/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:03:24,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:03:24,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:03:24,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:03:24,758 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 04:03:24,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:03:24,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:03:24,784 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:03:24,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:03:24,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:03:24,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:03:24,786 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:03:24,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:03:24,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:03:24,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:03:24,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:03:24,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:03:24,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:03:24,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:03:24,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:03:24,789 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:03:25,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:03:25,025 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:03:25,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:03:25,027 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:03:25,028 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:03:25,029 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-06-05 04:03:25,029 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-06-05 04:03:25,051 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:03:25,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:03:25,053 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:03:25,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:03:25,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:03:25,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,071 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:03:25,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:03:25,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:03:25,073 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:03:25,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/1) ... [2021-06-05 04:03:25,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:03:25,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:03:25,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:03:25,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:03:25,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (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 04:03:25,140 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:03:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:03:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:03:25,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:03:25,141 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:03:25,141 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:03:25,141 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:03:25,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:03:25,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:03:25,142 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 04:03:25,300 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:03:25,300 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:03:25,301 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 04:03:25,301 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 04:03:25,302 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:03:25 BoogieIcfgContainer [2021-06-05 04:03:25,302 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:03:25,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:03:25,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:03:25,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:03:25,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:03:25" (1/2) ... [2021-06-05 04:03:25,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b10312 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:03:25, skipping insertion in model container [2021-06-05 04:03:25,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:03:25" (2/2) ... [2021-06-05 04:03:25,306 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-06-05 04:03:25,310 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:03:25,310 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:03:25,310 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:03:25,310 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:03:25,350 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:03:25,372 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:03:25,386 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:03:25,386 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:03:25,386 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:03:25,386 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:03:25,386 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:03:25,386 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:03:25,386 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:03:25,386 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:03:25,391 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 04:03:25,397 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 04:03:25,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,401 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:25,402 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:25,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:25,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-06-05 04:03:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:25,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386803059] [2021-06-05 04:03:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,519 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 04:03:25,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:25,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386803059] [2021-06-05 04:03:25,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386803059] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:25,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:25,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 04:03:25,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549768783] [2021-06-05 04:03:25,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:03:25,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:25,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:03:25,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:03:25,537 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 04:03:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:25,570 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-06-05 04:03:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:03:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 04:03:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:25,581 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:03:25,581 INFO L226 Difference]: Without dead ends: 19 [2021-06-05 04:03:25,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:03:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-06-05 04:03:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-06-05 04:03:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-06-05 04:03:25,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-06-05 04:03:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:25,602 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-06-05 04:03:25,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 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 04:03:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-06-05 04:03:25,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:25,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,602 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:25,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:03:25,603 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:25,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:25,603 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-06-05 04:03:25,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:25,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106667057] [2021-06-05 04:03:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:25,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106667057] [2021-06-05 04:03:25,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106667057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113326817] [2021-06-05 04:03:25,658 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 04:03:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:25,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-06-05 04:03:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:25,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113326817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:25,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:25,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-06-05 04:03:25,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082858763] [2021-06-05 04:03:25,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:03:25,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:03:25,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:03:25,771 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:25,810 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-06-05 04:03:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:03:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:25,811 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:03:25,812 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:03:25,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.5ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:03:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:03:25,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-06-05 04:03:25,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-06-05 04:03:25,823 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-06-05 04:03:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:25,823 INFO L482 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-06-05 04:03:25,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-06-05 04:03:25,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:25,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:25,825 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 04:03:26,045 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,046 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-06-05 04:03:26,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634795445] [2021-06-05 04:03:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,119 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 04:03:26,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634795445] [2021-06-05 04:03:26,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634795445] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:26,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:26,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:03:26,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959714780] [2021-06-05 04:03:26,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,124 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,152 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-06-05 04:03:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:03:26,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:03:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,157 INFO L225 Difference]: With dead ends: 22 [2021-06-05 04:03:26,157 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 04:03:26,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:03:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 04:03:26,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 04:03:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-06-05 04:03:26,162 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-06-05 04:03:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,162 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-06-05 04:03:26,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-06-05 04:03:26,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:03:26,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:03:26,163 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-06-05 04:03:26,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371380254] [2021-06-05 04:03:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,201 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 04:03:26,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371380254] [2021-06-05 04:03:26,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371380254] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:03:26,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:03:26,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:03:26,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999187498] [2021-06-05 04:03:26,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,204 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,220 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-06-05 04:03:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:03:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,221 INFO L225 Difference]: With dead ends: 20 [2021-06-05 04:03:26,221 INFO L226 Difference]: Without dead ends: 20 [2021-06-05 04:03:26,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-06-05 04:03:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-06-05 04:03:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-06-05 04:03:26,227 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-06-05 04:03:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,227 INFO L482 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-06-05 04:03:26,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,228 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-06-05 04:03:26,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:03:26,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:03:26,228 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-06-05 04:03:26,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248379592] [2021-06-05 04:03:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:26,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248379592] [2021-06-05 04:03:26,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248379592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465509319] [2021-06-05 04:03:26,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 04:03:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 04:03:26,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:26,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:26,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465509319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:26,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 04:03:26,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827797233] [2021-06-05 04:03:26,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:03:26,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:03:26,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,353 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,362 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-06-05 04:03:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:03:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:03:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,363 INFO L225 Difference]: With dead ends: 24 [2021-06-05 04:03:26,363 INFO L226 Difference]: Without dead ends: 24 [2021-06-05 04:03:26,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:03:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-06-05 04:03:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-06-05 04:03:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 04:03:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-06-05 04:03:26,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-06-05 04:03:26,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,366 INFO L482 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-06-05 04:03:26,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-06-05 04:03:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:03:26,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,366 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:26,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:26,581 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:26,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:26,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-06-05 04:03:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:26,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920358671] [2021-06-05 04:03:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:26,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:26,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920358671] [2021-06-05 04:03:26,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920358671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498181800] [2021-06-05 04:03:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:26,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:26,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:03:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:26,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:26,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:03:26,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:26,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:26,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:26,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:03:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:26,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498181800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:26,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:26,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 04:03:26,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448870043] [2021-06-05 04:03:26,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:26,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:26,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:26,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:26,748 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:26,779 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-06-05 04:03:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:03:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:26,780 INFO L225 Difference]: With dead ends: 54 [2021-06-05 04:03:26,780 INFO L226 Difference]: Without dead ends: 51 [2021-06-05 04:03:26,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-05 04:03:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-06-05 04:03:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 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 04:03:26,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-06-05 04:03:26,784 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-06-05 04:03:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:26,784 INFO L482 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-06-05 04:03:26,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-06-05 04:03:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:03:26,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:26,785 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,001 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-06-05 04:03:27,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480205615] [2021-06-05 04:03:27,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:27,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480205615] [2021-06-05 04:03:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480205615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568881086] [2021-06-05 04:03:27,026 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 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 04:03:27,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:03:27,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:27,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:27,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:03:27,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:03:27,109 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568881086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 04:03:27,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332927494] [2021-06-05 04:03:27,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:27,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:27,110 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,132 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-06-05 04:03:27,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:27,133 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:03:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,133 INFO L225 Difference]: With dead ends: 61 [2021-06-05 04:03:27,133 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:03:27,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:27,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:03:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-06-05 04:03:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-06-05 04:03:27,137 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-06-05 04:03:27,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:27,138 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-06-05 04:03:27,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-06-05 04:03:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:03:27,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,138 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,353 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-06-05 04:03:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710075720] [2021-06-05 04:03:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:27,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710075720] [2021-06-05 04:03:27,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710075720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151550604] [2021-06-05 04:03:27,373 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 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 04:03:27,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:27,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-06-05 04:03:27,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:27,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:27,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-06-05 04:03:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151550604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-06-05 04:03:27,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269280971] [2021-06-05 04:03:27,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:27,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:27,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:27,449 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,478 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-06-05 04:03:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 04:03:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,479 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:03:27,479 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:03:27,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:03:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-06-05 04:03:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 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 04:03:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-06-05 04:03:27,483 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-06-05 04:03:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:27,483 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-06-05 04:03:27,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-06-05 04:03:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:27,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,484 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:27,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,701 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:27,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:27,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-06-05 04:03:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:27,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141606407] [2021-06-05 04:03:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:27,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141606407] [2021-06-05 04:03:27,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141606407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117254829] [2021-06-05 04:03:27,736 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:27,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:27,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:27,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117254829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:27,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:27,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:03:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577628878] [2021-06-05 04:03:27,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:27,819 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:27,881 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-06-05 04:03:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:27,883 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:03:27,883 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:03:27,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:27,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:03:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-06-05 04:03:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-06-05 04:03:27,901 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-06-05 04:03:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:27,901 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-06-05 04:03:27,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-06-05 04:03:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:27,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:27,904 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:28,112 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-06-05 04:03:28,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892157519] [2021-06-05 04:03:28,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892157519] [2021-06-05 04:03:28,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892157519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220992888] [2021-06-05 04:03:28,149 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 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 04:03:28,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:03:28,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:28,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220992888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:03:28,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577226597] [2021-06-05 04:03:28,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:28,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:28,212 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,296 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 04:03:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:28,297 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:03:28,297 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:03:28,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:03:28,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-06-05 04:03:28,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-06-05 04:03:28,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-06-05 04:03:28,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:28,302 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-06-05 04:03:28,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,303 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-06-05 04:03:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:28,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:28,303 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 04:03:28,504 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-06-05 04:03:28,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156567356] [2021-06-05 04:03:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156567356] [2021-06-05 04:03:28,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156567356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845101656] [2021-06-05 04:03:28,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845101656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:28,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132994706] [2021-06-05 04:03:28,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:28,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:28,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:28,596 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,656 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-06-05 04:03:28,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:28,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:28,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:28,657 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:03:28,657 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 04:03:28,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 04:03:28,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-06-05 04:03:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 04:03:28,659 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 04:03:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:28,659 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 04:03:28,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 04:03:28,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:28,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:28,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:28,865 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 04:03:28,865 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:28,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:28,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-06-05 04:03:28,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:28,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132169393] [2021-06-05 04:03:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:28,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132169393] [2021-06-05 04:03:28,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132169393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992650883] [2021-06-05 04:03:28,906 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 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 04:03:28,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:28,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:28,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992650883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:28,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:28,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:28,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213633168] [2021-06-05 04:03:28,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:28,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:28,970 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:28,999 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-06-05 04:03:29,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:03:29,000 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:29,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,001 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:03:29,001 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:03:29,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 19.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:29,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:03:29,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-06-05 04:03:29,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-06-05 04:03:29,003 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-06-05 04:03:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-06-05 04:03:29,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-06-05 04:03:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:29,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:29,004 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:29,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:29,213 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-06-05 04:03:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:29,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837940614] [2021-06-05 04:03:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:29,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837940614] [2021-06-05 04:03:29,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837940614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798216514] [2021-06-05 04:03:29,241 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 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 04:03:29,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:29,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:29,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:29,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798216514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:29,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:29,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311316194] [2021-06-05 04:03:29,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:29,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:29,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:29,313 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:29,337 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 04:03:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:03:29,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,339 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:03:29,339 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:03:29,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:03:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-06-05 04:03:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-06-05 04:03:29,342 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-06-05 04:03:29,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:29,342 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-06-05 04:03:29,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,343 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-06-05 04:03:29,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:29,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:29,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:29,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:29,553 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:29,553 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-06-05 04:03:29,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:29,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159498756] [2021-06-05 04:03:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:29,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159498756] [2021-06-05 04:03:29,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159498756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998022693] [2021-06-05 04:03:29,578 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 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 04:03:29,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:29,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:29,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:29,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998022693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:29,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:29,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179692805] [2021-06-05 04:03:29,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:29,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:29,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:29,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:29,626 INFO L87 Difference]: Start difference. First operand 60 states and 143 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:29,678 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-06-05 04:03:29,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:29,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:29,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:29,679 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:03:29,679 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:03:29,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:03:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-06-05 04:03:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-06-05 04:03:29,681 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-06-05 04:03:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:29,682 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-06-05 04:03:29,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-06-05 04:03:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:29,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:29,682 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:29,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 04:03:29,888 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-06-05 04:03:29,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:29,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218118006] [2021-06-05 04:03:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218118006] [2021-06-05 04:03:29,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218118006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95890231] [2021-06-05 04:03:29,918 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 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 04:03:29,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:29,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:29,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:29,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:29,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95890231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:29,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:29,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:29,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604280840] [2021-06-05 04:03:29,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:29,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:29,963 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,021 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-06-05 04:03:30,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,022 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:03:30,022 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:03:30,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:03:30,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-06-05 04:03:30,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 04:03:30,029 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 04:03:30,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,029 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 04:03:30,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 04:03:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:30,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 04:03:30,237 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-06-05 04:03:30,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163715610] [2021-06-05 04:03:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163715610] [2021-06-05 04:03:30,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163715610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551354563] [2021-06-05 04:03:30,264 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 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 04:03:30,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:03:30,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:30,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:30,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551354563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:30,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-05 04:03:30,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528900553] [2021-06-05 04:03:30,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:03:30,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:30,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:03:30,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:03:30,321 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,358 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-06-05 04:03:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:03:30,359 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,359 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:03:30,359 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:03:30,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:03:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-06-05 04:03:30,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-06-05 04:03:30,361 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-06-05 04:03:30,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,361 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-06-05 04:03:30,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,361 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-06-05 04:03:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:30,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,362 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 04:03:30,575 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,575 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-06-05 04:03:30,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116589301] [2021-06-05 04:03:30,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116589301] [2021-06-05 04:03:30,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116589301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903620385] [2021-06-05 04:03:30,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 04:03:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903620385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:30,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:03:30,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247774660] [2021-06-05 04:03:30,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:30,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:30,670 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:30,719 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-06-05 04:03:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:30,719 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:03:30,719 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:03:30,720 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:30,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:03:30,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-06-05 04:03:30,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 04:03:30,721 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 04:03:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:30,722 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 04:03:30,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 04:03:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:30,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:30,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:30,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:30,933 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:30,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:30,933 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-06-05 04:03:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:30,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967814032] [2021-06-05 04:03:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:30,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967814032] [2021-06-05 04:03:30,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967814032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130950273] [2021-06-05 04:03:30,969 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 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 04:03:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:30,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130950273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-05 04:03:31,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153660841] [2021-06-05 04:03:31,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:31,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:31,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:31,025 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:31,083 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 04:03:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:31,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:31,087 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:03:31,087 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:03:31,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:31,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:03:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-06-05 04:03:31,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-06-05 04:03:31,091 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-06-05 04:03:31,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,091 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-06-05 04:03:31,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,091 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-06-05 04:03:31,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:31,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,091 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 04:03:31,305 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-06-05 04:03:31,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636609737] [2021-06-05 04:03:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636609737] [2021-06-05 04:03:31,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636609737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736233573] [2021-06-05 04:03:31,346 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 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 04:03:31,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:31,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736233573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 04:03:31,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116783582] [2021-06-05 04:03:31,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:31,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:31,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:31,406 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:31,436 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-06-05 04:03:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:31,437 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:03:31,438 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 04:03:31,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 25.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:31,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 04:03:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-06-05 04:03:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-06-05 04:03:31,440 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-06-05 04:03:31,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,440 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-06-05 04:03:31,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,440 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-06-05 04:03:31,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:31,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,441 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:31,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:31,649 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:31,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:31,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-06-05 04:03:31,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:31,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757864849] [2021-06-05 04:03:31,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757864849] [2021-06-05 04:03:31,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757864849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428890060] [2021-06-05 04:03:31,677 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 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 04:03:31,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:31,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:31,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:31,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428890060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:31,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:31,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 04:03:31,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879836494] [2021-06-05 04:03:31,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:31,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:31,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:31,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:31,730 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:31,791 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-06-05 04:03:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:31,792 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:03:31,792 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:03:31,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:03:31,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-06-05 04:03:31,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-06-05 04:03:31,794 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-06-05 04:03:31,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:31,794 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-06-05 04:03:31,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-06-05 04:03:31,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:31,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:31,795 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,009 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-06-05 04:03:32,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396211991] [2021-06-05 04:03:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396211991] [2021-06-05 04:03:32,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396211991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585717986] [2021-06-05 04:03:32,035 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 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 04:03:32,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:32,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:32,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:32,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585717986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 04:03:32,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613343155] [2021-06-05 04:03:32,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:32,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:32,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:32,085 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,144 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-06-05 04:03:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,145 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:03:32,145 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:03:32,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:03:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-06-05 04:03:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-06-05 04:03:32,147 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-06-05 04:03:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-06-05 04:03:32,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-06-05 04:03:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:32,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 04:03:32,364 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,364 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-06-05 04:03:32,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242038073] [2021-06-05 04:03:32,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242038073] [2021-06-05 04:03:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242038073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433673195] [2021-06-05 04:03:32,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:03:32,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:32,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:32,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433673195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-06-05 04:03:32,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939330777] [2021-06-05 04:03:32,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 04:03:32,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 04:03:32,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:03:32,458 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,505 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-06-05 04:03:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,506 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:03:32,506 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:03:32,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:32,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:03:32,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-06-05 04:03:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-06-05 04:03:32,508 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-06-05 04:03:32,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,508 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-06-05 04:03:32,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-06-05 04:03:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:32,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,508 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:32,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:32,717 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:32,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:32,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-06-05 04:03:32,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:32,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354418527] [2021-06-05 04:03:32,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:32,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354418527] [2021-06-05 04:03:32,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354418527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379602679] [2021-06-05 04:03:32,751 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 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 04:03:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:32,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379602679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:32,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:32,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 04:03:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20936765] [2021-06-05 04:03:32,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:32,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:32,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:32,808 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:32,874 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-06-05 04:03:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 13 [2021-06-05 04:03:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:32,875 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:03:32,875 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:03:32,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:32,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:03:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-06-05 04:03:32,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:32,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 04:03:32,877 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 04:03:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:32,877 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 04:03:32,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:32,877 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 04:03:32,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:32,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:32,878 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 04:03:33,089 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-06-05 04:03:33,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971404441] [2021-06-05 04:03:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971404441] [2021-06-05 04:03:33,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971404441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631657087] [2021-06-05 04:03:33,119 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 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 04:03:33,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:33,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:33,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631657087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:33,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 04:03:33,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918692910] [2021-06-05 04:03:33,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:33,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:33,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:33,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:33,177 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:33,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:33,256 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-06-05 04:03:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:33,257 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 13 [2021-06-05 04:03:33,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,257 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:03:33,257 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:03:33,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:03:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-06-05 04:03:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-06-05 04:03:33,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-06-05 04:03:33,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:33,259 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-06-05 04:03:33,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:33,259 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-06-05 04:03:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:33,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:33,260 INFO L521 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 04:03:33,475 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-06-05 04:03:33,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298221358] [2021-06-05 04:03:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298221358] [2021-06-05 04:03:33,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298221358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932352218] [2021-06-05 04:03:33,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:33,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:33,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:33,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:33,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:33,572 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 04:03:33,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932352218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:33,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 04:03:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860760465] [2021-06-05 04:03:33,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:33,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:33,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:33,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:33,573 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:33,633 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-06-05 04:03:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:33,634 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:03:33,634 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:03:33,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:33,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:03:33,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-06-05 04:03:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-06-05 04:03:33,636 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-06-05 04:03:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:33,636 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-06-05 04:03:33,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-06-05 04:03:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:03:33,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:33,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:33,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:33,845 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:33,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:33,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-06-05 04:03:33,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:33,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015182190] [2021-06-05 04:03:33,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:33,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015182190] [2021-06-05 04:03:33,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015182190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317495163] [2021-06-05 04:03:33,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:33,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:33,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:03:33,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:33,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317495163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:33,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:33,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 04:03:33,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117647669] [2021-06-05 04:03:33,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:33,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:33,940 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,047 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-06-05 04:03:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:34,048 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 04:03:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,048 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:03:34,048 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:03:34,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:03:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 04:03:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-06-05 04:03:34,050 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-06-05 04:03:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,050 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-06-05 04:03:34,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-06-05 04:03:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:03:34,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,051 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:34,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 04:03:34,265 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:34,265 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-06-05 04:03:34,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:34,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460622717] [2021-06-05 04:03:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:03:34,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460622717] [2021-06-05 04:03:34,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460622717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367306762] [2021-06-05 04:03:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:34,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:34,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:34,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:03:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367306762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:34,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-06-05 04:03:34,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451960212] [2021-06-05 04:03:34,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:34,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:34,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:34,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:34,352 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,393 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-06-05 04:03:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:34,393 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 04:03:34,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,394 INFO L225 Difference]: With dead ends: 227 [2021-06-05 04:03:34,394 INFO L226 Difference]: Without dead ends: 225 [2021-06-05 04:03:34,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-06-05 04:03:34,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-06-05 04:03:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 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 04:03:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-06-05 04:03:34,403 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-06-05 04:03:34,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,403 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-06-05 04:03:34,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-06-05 04:03:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:34,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,404 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:34,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:34,620 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-06-05 04:03:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:34,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449821634] [2021-06-05 04:03:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:34,647 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 04:03:34,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449821634] [2021-06-05 04:03:34,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449821634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785911636] [2021-06-05 04:03:34,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:34,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:03:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:34,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:34,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:03:34,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:34,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:34,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:34,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:03:34,852 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 04:03:34,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785911636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:34,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:34,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 04:03:34,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313436364] [2021-06-05 04:03:34,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:34,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:34,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:34,853 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:34,908 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-06-05 04:03:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:34,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:03:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:34,910 INFO L225 Difference]: With dead ends: 248 [2021-06-05 04:03:34,910 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 04:03:34,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 04:03:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-06-05 04:03:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 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 04:03:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-06-05 04:03:34,914 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-06-05 04:03:34,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:34,915 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-06-05 04:03:34,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:34,915 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-06-05 04:03:34,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:34,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:34,916 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:35,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 04:03:35,129 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:35,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:35,129 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-06-05 04:03:35,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:35,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912153498] [2021-06-05 04:03:35,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,152 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 04:03:35,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:35,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912153498] [2021-06-05 04:03:35,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912153498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499051918] [2021-06-05 04:03:35,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:35,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:35,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:35,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:03:35,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:35,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:35,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:35,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:03:35,317 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 04:03:35,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499051918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:35,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 04:03:35,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261824900] [2021-06-05 04:03:35,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:35,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:35,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:35,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:35,318 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:35,381 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-06-05 04:03:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:03:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:35,382 INFO L225 Difference]: With dead ends: 296 [2021-06-05 04:03:35,382 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 04:03:35,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 04:03:35,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-06-05 04:03:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 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 04:03:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-06-05 04:03:35,386 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-06-05 04:03:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,387 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-06-05 04:03:35,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-06-05 04:03:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:35,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,387 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:35,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 04:03:35,601 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-06-05 04:03:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:35,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230285525] [2021-06-05 04:03:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:35,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:35,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230285525] [2021-06-05 04:03:35,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230285525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141534254] [2021-06-05 04:03:35,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:35,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:35,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:35,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:35,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:35,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:35,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:03:35,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:35,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:35,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:35,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:03:35,778 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 04:03:35,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141534254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:35,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:35,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 04:03:35,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107312855] [2021-06-05 04:03:35,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:35,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:35,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:35,780 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:35,848 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-06-05 04:03:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:03:35,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:35,850 INFO L225 Difference]: With dead ends: 353 [2021-06-05 04:03:35,850 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 04:03:35,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 04:03:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-06-05 04:03:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 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 04:03:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-06-05 04:03:35,855 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-06-05 04:03:35,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:35,855 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-06-05 04:03:35,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:35,855 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-06-05 04:03:35,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:35,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:35,856 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:36,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 04:03:36,073 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:36,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:36,073 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-06-05 04:03:36,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:36,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123110068] [2021-06-05 04:03:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:36,095 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 04:03:36,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:36,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123110068] [2021-06-05 04:03:36,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123110068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648895419] [2021-06-05 04:03:36,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:36,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:36,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:36,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:03:36,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:36,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:36,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:36,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:03:36,224 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 04:03:36,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648895419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:36,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 04:03:36,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177296689] [2021-06-05 04:03:36,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:36,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:36,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:36,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:36,225 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:36,313 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-06-05 04:03:36,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:36,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:03:36,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:36,315 INFO L225 Difference]: With dead ends: 397 [2021-06-05 04:03:36,315 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 04:03:36,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:36,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 04:03:36,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-06-05 04:03:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 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 04:03:36,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-06-05 04:03:36,321 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-06-05 04:03:36,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:36,321 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-06-05 04:03:36,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,321 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-06-05 04:03:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:03:36,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:36,322 INFO L521 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:36,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,535 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:36,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-06-05 04:03:36,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:36,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259487978] [2021-06-05 04:03:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:36,557 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 04:03:36,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259487978] [2021-06-05 04:03:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259487978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734801465] [2021-06-05 04:03:36,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:36,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:36,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:36,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 04:03:36,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:36,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-06-05 04:03:36,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:36,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:36,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:36,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-06-05 04:03:36,711 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 04:03:36,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734801465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:36,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:36,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-06-05 04:03:36,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776551400] [2021-06-05 04:03:36,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:36,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:36,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:36,713 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:36,797 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-06-05 04:03:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 04:03:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:36,799 INFO L225 Difference]: With dead ends: 427 [2021-06-05 04:03:36,799 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 04:03:36,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 04:03:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-06-05 04:03:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 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 04:03:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-06-05 04:03:36,809 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-06-05 04:03:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:36,810 INFO L482 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-06-05 04:03:36,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-06-05 04:03:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:36,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:36,811 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 04:03:37,025 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-06-05 04:03:37,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522319220] [2021-06-05 04:03:37,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522319220] [2021-06-05 04:03:37,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522319220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151074040] [2021-06-05 04:03:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:37,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:03:37,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:37,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151074040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:03:37,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432788057] [2021-06-05 04:03:37,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:37,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:37,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:37,127 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,236 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-06-05 04:03:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:37,238 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:03:37,238 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 04:03:37,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 04:03:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-06-05 04:03:37,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 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 04:03:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-06-05 04:03:37,248 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-06-05 04:03:37,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,248 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-06-05 04:03:37,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,248 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-06-05 04:03:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:37,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,249 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,464 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-06-05 04:03:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309462246] [2021-06-05 04:03:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309462246] [2021-06-05 04:03:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309462246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101835859] [2021-06-05 04:03:37,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:03:37,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101835859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856845183] [2021-06-05 04:03:37,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:37,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:37,562 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,598 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-06-05 04:03:37,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:37,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:37,600 INFO L225 Difference]: With dead ends: 490 [2021-06-05 04:03:37,600 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:03:37,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:37,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:03:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-06-05 04:03:37,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 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 04:03:37,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-06-05 04:03:37,607 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-06-05 04:03:37,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,607 INFO L482 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-06-05 04:03:37,607 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,607 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-06-05 04:03:37,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:37,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,608 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:37,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 04:03:37,824 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-06-05 04:03:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:37,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395775617] [2021-06-05 04:03:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:37,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395775617] [2021-06-05 04:03:37,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395775617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42335418] [2021-06-05 04:03:37,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:37,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:37,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42335418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:37,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:37,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:37,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162302579] [2021-06-05 04:03:37,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:37,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:37,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:37,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:37,907 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:37,982 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-06-05 04:03:37,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:37,982 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:37,984 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:03:37,984 INFO L226 Difference]: Without dead ends: 464 [2021-06-05 04:03:37,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-06-05 04:03:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-06-05 04:03:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 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 04:03:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-06-05 04:03:37,991 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-06-05 04:03:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:37,991 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-06-05 04:03:37,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-06-05 04:03:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:37,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:37,992 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-06-05 04:03:38,208 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-06-05 04:03:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920383631] [2021-06-05 04:03:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920383631] [2021-06-05 04:03:38,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920383631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187894554] [2021-06-05 04:03:38,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:38,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:38,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:38,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187894554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:38,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088576673] [2021-06-05 04:03:38,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:38,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:38,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:38,301 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:38,338 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-06-05 04:03:38,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:38,338 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,340 INFO L225 Difference]: With dead ends: 501 [2021-06-05 04:03:38,340 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 04:03:38,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 04:03:38,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-06-05 04:03:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 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 04:03:38,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-06-05 04:03:38,347 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-06-05 04:03:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:38,347 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-06-05 04:03:38,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-06-05 04:03:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:38,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,348 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,561 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,561 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-06-05 04:03:38,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119040716] [2021-06-05 04:03:38,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119040716] [2021-06-05 04:03:38,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119040716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703973161] [2021-06-05 04:03:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:38,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:38,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:38,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:38,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:38,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703973161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:38,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:03:38,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106727837] [2021-06-05 04:03:38,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:38,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:38,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:38,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:38,677 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:38,733 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-06-05 04:03:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:38,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:38,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:38,735 INFO L225 Difference]: With dead ends: 535 [2021-06-05 04:03:38,735 INFO L226 Difference]: Without dead ends: 535 [2021-06-05 04:03:38,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:38,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-05 04:03:38,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-06-05 04:03:38,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 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 04:03:38,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-06-05 04:03:38,742 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-06-05 04:03:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:38,742 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-06-05 04:03:38,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-06-05 04:03:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:38,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:38,743 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:38,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-05 04:03:38,953 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-06-05 04:03:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:38,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044884971] [2021-06-05 04:03:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:38,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:38,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044884971] [2021-06-05 04:03:38,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044884971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:38,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569248538] [2021-06-05 04:03:38,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:39,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:39,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:39,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569248538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:39,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:39,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742027975] [2021-06-05 04:03:39,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:39,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:39,027 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,086 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-06-05 04:03:39,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:39,086 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:39,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,088 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:03:39,088 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 04:03:39,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:39,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 04:03:39,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-06-05 04:03:39,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 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 04:03:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-06-05 04:03:39,095 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-06-05 04:03:39,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:39,096 INFO L482 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-06-05 04:03:39,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-06-05 04:03:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:39,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:39,096 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:39,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:39,312 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:39,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-06-05 04:03:39,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:39,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072612694] [2021-06-05 04:03:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:39,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:39,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:39,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072612694] [2021-06-05 04:03:39,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072612694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961193906] [2021-06-05 04:03:39,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:39,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:39,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:39,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:39,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:39,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961193906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:39,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:39,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512124924] [2021-06-05 04:03:39,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:39,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:39,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:39,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:39,395 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,433 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-06-05 04:03:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:39,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:39,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,435 INFO L225 Difference]: With dead ends: 447 [2021-06-05 04:03:39,435 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 04:03:39,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:39,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 04:03:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-06-05 04:03:39,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 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 04:03:39,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-06-05 04:03:39,443 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-06-05 04:03:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:39,443 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-06-05 04:03:39,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-06-05 04:03:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:39,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:39,444 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:39,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-06-05 04:03:39,657 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-06-05 04:03:39,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:39,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668078606] [2021-06-05 04:03:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:39,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668078606] [2021-06-05 04:03:39,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668078606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598750361] [2021-06-05 04:03:39,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:39,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:39,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:39,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598750361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:39,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:39,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:39,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015294169] [2021-06-05 04:03:39,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:39,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:39,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:39,741 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:39,801 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-06-05 04:03:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:39,802 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:39,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:39,803 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:03:39,803 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:03:39,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:39,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:03:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-06-05 04:03:39,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 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 04:03:39,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-06-05 04:03:39,810 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-06-05 04:03:39,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:39,810 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-06-05 04:03:39,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:39,810 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-06-05 04:03:39,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:39,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:39,811 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:40,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 04:03:40,026 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:40,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:40,027 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-06-05 04:03:40,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:40,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507132678] [2021-06-05 04:03:40,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507132678] [2021-06-05 04:03:40,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507132678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475172990] [2021-06-05 04:03:40,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:40,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475172990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:40,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248851150] [2021-06-05 04:03:40,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:40,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:40,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:40,113 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:40,188 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-06-05 04:03:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:40,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,190 INFO L225 Difference]: With dead ends: 536 [2021-06-05 04:03:40,190 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 04:03:40,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 04:03:40,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-06-05 04:03:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 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 04:03:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-06-05 04:03:40,196 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-06-05 04:03:40,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,196 INFO L482 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-06-05 04:03:40,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,196 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-06-05 04:03:40,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:40,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,197 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:40,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:40,413 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-06-05 04:03:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:40,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152531402] [2021-06-05 04:03:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152531402] [2021-06-05 04:03:40,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152531402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745152267] [2021-06-05 04:03:40,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:40,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:40,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:40,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:40,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745152267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:40,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434434679] [2021-06-05 04:03:40,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:40,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:40,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:40,490 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:40,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:40,584 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-06-05 04:03:40,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:40,584 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 16 [2021-06-05 04:03:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,586 INFO L225 Difference]: With dead ends: 493 [2021-06-05 04:03:40,586 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:03:40,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:40,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:03:40,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-06-05 04:03:40,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-06-05 04:03:40,593 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-06-05 04:03:40,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,593 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-06-05 04:03:40,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 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 04:03:40,593 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-06-05 04:03:40,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:40,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,594 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:40,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 04:03:40,809 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:40,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:40,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-06-05 04:03:40,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:40,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001950104] [2021-06-05 04:03:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:40,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001950104] [2021-06-05 04:03:40,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001950104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367996500] [2021-06-05 04:03:40,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:40,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:40,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:40,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:40,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367996500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:40,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450967991] [2021-06-05 04:03:40,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:40,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:40,893 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:40,961 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-06-05 04:03:40,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:40,963 INFO L225 Difference]: With dead ends: 566 [2021-06-05 04:03:40,963 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 04:03:40,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 04:03:40,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-06-05 04:03:40,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 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 04:03:40,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-06-05 04:03:40,970 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-06-05 04:03:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:40,971 INFO L482 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-06-05 04:03:40,971 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-06-05 04:03:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:40,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:40,971 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,188 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-06-05 04:03:41,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287075304] [2021-06-05 04:03:41,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287075304] [2021-06-05 04:03:41,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287075304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295727941] [2021-06-05 04:03:41,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:41,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:41,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295727941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:41,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994951497] [2021-06-05 04:03:41,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:41,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:41,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:41,267 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:41,329 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-06-05 04:03:41,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:41,329 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:41,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:41,331 INFO L225 Difference]: With dead ends: 471 [2021-06-05 04:03:41,331 INFO L226 Difference]: Without dead ends: 467 [2021-06-05 04:03:41,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-06-05 04:03:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-06-05 04:03:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 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 04:03:41,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-06-05 04:03:41,337 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-06-05 04:03:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,337 INFO L482 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-06-05 04:03:41,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,337 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-06-05 04:03:41,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:41,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,337 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 04:03:41,553 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,553 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-06-05 04:03:41,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112691779] [2021-06-05 04:03:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112691779] [2021-06-05 04:03:41,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112691779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845357109] [2021-06-05 04:03:41,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:41,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:41,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845357109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:41,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447024474] [2021-06-05 04:03:41,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:41,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:41,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:41,641 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:41,678 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-06-05 04:03:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:41,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:41,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:41,679 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:03:41,679 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 04:03:41,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:41,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 04:03:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-06-05 04:03:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 04:03:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-06-05 04:03:41,685 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-06-05 04:03:41,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:41,685 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-06-05 04:03:41,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-06-05 04:03:41,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:41,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:41,686 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:41,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,901 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:41,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:41,901 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-06-05 04:03:41,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986967513] [2021-06-05 04:03:41,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:41,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986967513] [2021-06-05 04:03:41,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986967513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226960518] [2021-06-05 04:03:41,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:41,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:41,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:41,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:41,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:41,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:41,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226960518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:41,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:41,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:03:41,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667885054] [2021-06-05 04:03:41,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:41,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:41,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:41,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:41,992 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:42,034 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-06-05 04:03:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:42,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:42,035 INFO L225 Difference]: With dead ends: 456 [2021-06-05 04:03:42,035 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 04:03:42,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 04:03:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-06-05 04:03:42,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 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 04:03:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-06-05 04:03:42,040 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-06-05 04:03:42,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:42,041 INFO L482 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-06-05 04:03:42,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-06-05 04:03:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:42,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:42,041 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:42,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:42,261 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-06-05 04:03:42,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:42,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922961190] [2021-06-05 04:03:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922961190] [2021-06-05 04:03:42,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922961190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89421225] [2021-06-05 04:03:42,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:42,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89421225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:42,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:03:42,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711085530] [2021-06-05 04:03:42,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:42,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:42,357 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:42,434 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-06-05 04:03:42,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:03:42,434 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:42,435 INFO L225 Difference]: With dead ends: 466 [2021-06-05 04:03:42,435 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 04:03:42,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:42,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 04:03:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-06-05 04:03:42,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 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 04:03:42,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-06-05 04:03:42,440 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-06-05 04:03:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:42,440 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-06-05 04:03:42,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-06-05 04:03:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:42,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:42,441 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:42,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:42,655 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:42,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-06-05 04:03:42,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:42,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591084863] [2021-06-05 04:03:42,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591084863] [2021-06-05 04:03:42,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591084863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739346113] [2021-06-05 04:03:42,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:42,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:42,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:42,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:42,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:42,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739346113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:42,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:42,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 04:03:42,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584458543] [2021-06-05 04:03:42,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:42,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:42,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:42,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:42,767 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:42,876 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-06-05 04:03:42,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:42,876 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:42,878 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:03:42,878 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 04:03:42,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 04:03:42,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-06-05 04:03:42,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 04:03:42,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-06-05 04:03:42,884 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-06-05 04:03:42,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:42,884 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-06-05 04:03:42,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-06-05 04:03:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:42,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:42,885 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:43,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:43,101 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:43,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:43,101 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-06-05 04:03:43,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:43,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709446714] [2021-06-05 04:03:43,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:43,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:43,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709446714] [2021-06-05 04:03:43,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709446714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175843210] [2021-06-05 04:03:43,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:43,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:43,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:43,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:43,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175843210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:43,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:03:43,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037504162] [2021-06-05 04:03:43,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:43,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:43,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:43,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:43,203 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:43,321 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-06-05 04:03:43,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:43,321 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:43,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:43,322 INFO L225 Difference]: With dead ends: 489 [2021-06-05 04:03:43,322 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 04:03:43,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 04:03:43,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-06-05 04:03:43,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 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 04:03:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-06-05 04:03:43,328 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-06-05 04:03:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:43,328 INFO L482 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-06-05 04:03:43,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-06-05 04:03:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:43,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:43,329 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:43,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 04:03:43,545 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:43,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:43,545 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-06-05 04:03:43,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:43,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241708904] [2021-06-05 04:03:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:43,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:43,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:43,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241708904] [2021-06-05 04:03:43,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241708904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831298043] [2021-06-05 04:03:43,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:43,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:43,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:43,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:43,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831298043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:43,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:43,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:03:43,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332444610] [2021-06-05 04:03:43,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:43,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:43,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:43,642 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:43,789 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-06-05 04:03:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:43,790 INFO L225 Difference]: With dead ends: 523 [2021-06-05 04:03:43,790 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 04:03:43,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:03:43,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 04:03:43,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-06-05 04:03:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 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 04:03:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-06-05 04:03:43,797 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-06-05 04:03:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:43,797 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-06-05 04:03:43,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-06-05 04:03:43,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:43,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:43,798 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,014 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,014 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-06-05 04:03:44,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47241536] [2021-06-05 04:03:44,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47241536] [2021-06-05 04:03:44,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47241536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261381018] [2021-06-05 04:03:44,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:03:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261381018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 04:03:44,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593383101] [2021-06-05 04:03:44,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:44,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:44,114 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:44,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:44,211 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-06-05 04:03:44,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:44,212 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:44,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:44,213 INFO L225 Difference]: With dead ends: 454 [2021-06-05 04:03:44,213 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 04:03:44,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:44,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 04:03:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-06-05 04:03:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 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 04:03:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-06-05 04:03:44,219 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-06-05 04:03:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:44,219 INFO L482 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-06-05 04:03:44,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-06-05 04:03:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:44,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:44,220 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,429 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-06-05 04:03:44,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201857253] [2021-06-05 04:03:44,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201857253] [2021-06-05 04:03:44,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201857253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473017922] [2021-06-05 04:03:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:44,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:44,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:44,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473017922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-06-05 04:03:44,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619961816] [2021-06-05 04:03:44,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:44,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:44,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:44,532 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:44,605 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-06-05 04:03:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:44,605 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:44,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:44,606 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:03:44,606 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:03:44,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:03:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-06-05 04:03:44,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 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 04:03:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-06-05 04:03:44,611 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-06-05 04:03:44,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:44,612 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-06-05 04:03:44,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-06-05 04:03:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:44,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:44,614 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:44,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 04:03:44,830 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-06-05 04:03:44,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:44,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868546752] [2021-06-05 04:03:44,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868546752] [2021-06-05 04:03:44,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868546752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247599341] [2021-06-05 04:03:44,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:44,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:44,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:44,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247599341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:44,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:44,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 04:03:44,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107392684] [2021-06-05 04:03:44,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:44,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:44,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:44,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:44,942 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:45,026 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-06-05 04:03:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:45,026 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:45,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:45,028 INFO L225 Difference]: With dead ends: 482 [2021-06-05 04:03:45,028 INFO L226 Difference]: Without dead ends: 482 [2021-06-05 04:03:45,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-06-05 04:03:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-06-05 04:03:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 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 04:03:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-06-05 04:03:45,034 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-06-05 04:03:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:45,034 INFO L482 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-06-05 04:03:45,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-06-05 04:03:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:45,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:45,035 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:45,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:45,245 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:45,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-06-05 04:03:45,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:45,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703081023] [2021-06-05 04:03:45,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:45,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:45,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703081023] [2021-06-05 04:03:45,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703081023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230273507] [2021-06-05 04:03:45,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:45,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:45,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:45,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:45,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:45,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:45,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230273507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:45,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-06-05 04:03:45,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406172709] [2021-06-05 04:03:45,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:45,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:45,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:45,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:45,358 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:45,449 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-06-05 04:03:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:03:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:45,451 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:03:45,451 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:03:45,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:03:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-06-05 04:03:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-06-05 04:03:45,458 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-06-05 04:03:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:45,458 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-06-05 04:03:45,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-06-05 04:03:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:45,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:45,459 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:45,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 04:03:45,665 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:45,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:45,665 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-06-05 04:03:45,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:45,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503537448] [2021-06-05 04:03:45,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:45,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:45,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503537448] [2021-06-05 04:03:45,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503537448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705314618] [2021-06-05 04:03:45,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:45,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:45,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:45,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:45,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:45,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705314618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:45,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:45,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:03:45,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67622427] [2021-06-05 04:03:45,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:45,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:45,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:45,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:45,779 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:45,894 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-06-05 04:03:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:45,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:45,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:45,896 INFO L225 Difference]: With dead ends: 486 [2021-06-05 04:03:45,896 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:03:45,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:03:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-06-05 04:03:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 04:03:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-06-05 04:03:45,901 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-06-05 04:03:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:45,901 INFO L482 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-06-05 04:03:45,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:45,902 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-06-05 04:03:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:03:45,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:45,902 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:46,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-05 04:03:46,103 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:46,103 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-06-05 04:03:46,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:46,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157179461] [2021-06-05 04:03:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:46,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:46,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:46,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157179461] [2021-06-05 04:03:46,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157179461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660747080] [2021-06-05 04:03:46,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:46,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:46,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660747080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:46,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:03:46,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792640516] [2021-06-05 04:03:46,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:03:46,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:03:46,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:46,238 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:46,415 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-06-05 04:03:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:03:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 04:03:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:46,417 INFO L225 Difference]: With dead ends: 533 [2021-06-05 04:03:46,417 INFO L226 Difference]: Without dead ends: 533 [2021-06-05 04:03:46,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:03:46,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-06-05 04:03:46,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-06-05 04:03:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 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 04:03:46,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-06-05 04:03:46,423 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-06-05 04:03:46,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:46,423 INFO L482 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-06-05 04:03:46,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:46,423 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-06-05 04:03:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:46,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:46,424 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:46,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 04:03:46,624 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:46,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:46,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-06-05 04:03:46,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:46,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535113373] [2021-06-05 04:03:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:46,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535113373] [2021-06-05 04:03:46,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535113373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343625379] [2021-06-05 04:03:46,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:46,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:46,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:46,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:46,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:46,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343625379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:46,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:46,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 04:03:46,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459203280] [2021-06-05 04:03:46,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:46,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:46,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:46,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:46,744 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:03:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:46,848 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-06-05 04:03:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:46,850 INFO L225 Difference]: With dead ends: 523 [2021-06-05 04:03:46,850 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 04:03:46,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:03:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 04:03:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-06-05 04:03:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 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 04:03:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-06-05 04:03:46,862 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-06-05 04:03:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:46,862 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-06-05 04:03:46,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:03:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-06-05 04:03:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:46,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:46,862 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:47,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-05 04:03:47,065 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:47,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:47,065 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-06-05 04:03:47,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:47,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299739925] [2021-06-05 04:03:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299739925] [2021-06-05 04:03:47,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299739925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926496468] [2021-06-05 04:03:47,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:47,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:47,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:47,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926496468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:47,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235429124] [2021-06-05 04:03:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:47,152 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:47,214 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-06-05 04:03:47,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:47,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:47,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:47,215 INFO L225 Difference]: With dead ends: 436 [2021-06-05 04:03:47,215 INFO L226 Difference]: Without dead ends: 434 [2021-06-05 04:03:47,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-06-05 04:03:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-06-05 04:03:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 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 04:03:47,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-06-05 04:03:47,220 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-06-05 04:03:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,220 INFO L482 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-06-05 04:03:47,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,220 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-06-05 04:03:47,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:47,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,221 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:47,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 04:03:47,422 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:47,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:47,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-06-05 04:03:47,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493262795] [2021-06-05 04:03:47,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:47,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493262795] [2021-06-05 04:03:47,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493262795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89862905] [2021-06-05 04:03:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:47,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:47,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89862905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:47,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-05 04:03:47,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066300573] [2021-06-05 04:03:47,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:03:47,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:47,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:03:47,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:03:47,510 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:47,547 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-06-05 04:03:47,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:47,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:47,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:47,561 INFO L225 Difference]: With dead ends: 505 [2021-06-05 04:03:47,561 INFO L226 Difference]: Without dead ends: 503 [2021-06-05 04:03:47,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-06-05 04:03:47,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-06-05 04:03:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 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 04:03:47,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-06-05 04:03:47,566 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-06-05 04:03:47,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,566 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-06-05 04:03:47,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-06-05 04:03:47,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:47,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,567 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:47,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 04:03:47,773 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:47,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-06-05 04:03:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:47,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453176361] [2021-06-05 04:03:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:47,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:47,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453176361] [2021-06-05 04:03:47,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453176361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723664935] [2021-06-05 04:03:47,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:47,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:47,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:47,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:47,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:47,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723664935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:47,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:47,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:47,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313885843] [2021-06-05 04:03:47,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:47,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:47,864 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 04:03:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:47,916 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-06-05 04:03:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:47,917 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:47,918 INFO L225 Difference]: With dead ends: 516 [2021-06-05 04:03:47,918 INFO L226 Difference]: Without dead ends: 515 [2021-06-05 04:03:47,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:47,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-06-05 04:03:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-06-05 04:03:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 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 04:03:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-06-05 04:03:47,923 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-06-05 04:03:47,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:47,923 INFO L482 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-06-05 04:03:47,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 04:03:47,923 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-06-05 04:03:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:47,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:47,924 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:48,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,149 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:48,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:48,149 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-06-05 04:03:48,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:48,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686535638] [2021-06-05 04:03:48,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:48,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686535638] [2021-06-05 04:03:48,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686535638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370692295] [2021-06-05 04:03:48,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:48,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:48,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370692295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:48,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:48,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574765198] [2021-06-05 04:03:48,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:48,234 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:48,306 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-06-05 04:03:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:48,308 INFO L225 Difference]: With dead ends: 503 [2021-06-05 04:03:48,308 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 04:03:48,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 04:03:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-06-05 04:03:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 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 04:03:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-06-05 04:03:48,313 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-06-05 04:03:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:48,313 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-06-05 04:03:48,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-06-05 04:03:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:48,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:48,313 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:48,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 04:03:48,518 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:48,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-06-05 04:03:48,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:48,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69214667] [2021-06-05 04:03:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:48,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69214667] [2021-06-05 04:03:48,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69214667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413060000] [2021-06-05 04:03:48,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:48,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:48,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:48,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:48,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413060000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:48,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:03:48,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047651514] [2021-06-05 04:03:48,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:48,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:48,613 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:48,702 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-06-05 04:03:48,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:48,702 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:48,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:48,703 INFO L225 Difference]: With dead ends: 478 [2021-06-05 04:03:48,703 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 04:03:48,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 04:03:48,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-06-05 04:03:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 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 04:03:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-06-05 04:03:48,709 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-06-05 04:03:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:48,709 INFO L482 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-06-05 04:03:48,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-06-05 04:03:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:48,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:48,710 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:48,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,925 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:48,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:48,925 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-06-05 04:03:48,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:48,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281621991] [2021-06-05 04:03:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:48,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:48,953 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:48,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281621991] [2021-06-05 04:03:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281621991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102063719] [2021-06-05 04:03:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:48,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:48,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,006 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:49,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102063719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:49,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446407246] [2021-06-05 04:03:49,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:49,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:49,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:49,007 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:03:49,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,044 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-06-05 04:03:49,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:03:49,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:49,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:49,045 INFO L225 Difference]: With dead ends: 508 [2021-06-05 04:03:49,045 INFO L226 Difference]: Without dead ends: 506 [2021-06-05 04:03:49,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:49,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-06-05 04:03:49,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-06-05 04:03:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 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 04:03:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-06-05 04:03:49,052 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-06-05 04:03:49,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,052 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-06-05 04:03:49,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:03:49,053 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-06-05 04:03:49,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:49,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,053 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:49,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-05 04:03:49,261 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-06-05 04:03:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:49,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190556187] [2021-06-05 04:03:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:49,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:49,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190556187] [2021-06-05 04:03:49,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190556187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952612105] [2021-06-05 04:03:49,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:49,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:49,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:49,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952612105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:49,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342775816] [2021-06-05 04:03:49,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:49,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:49,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:49,347 INFO L87 Difference]: Start difference. First operand 409 states and 1141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,414 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-06-05 04:03:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:49,415 INFO L225 Difference]: With dead ends: 497 [2021-06-05 04:03:49,415 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 04:03:49,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 04:03:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-06-05 04:03:49,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 04:03:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-06-05 04:03:49,421 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-06-05 04:03:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,422 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-06-05 04:03:49,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-06-05 04:03:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:49,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,422 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:49,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:49,637 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:49,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:49,637 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-06-05 04:03:49,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:49,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466727180] [2021-06-05 04:03:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:49,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466727180] [2021-06-05 04:03:49,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466727180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012480743] [2021-06-05 04:03:49,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:49,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:49,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012480743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:49,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:49,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 04:03:49,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364794513] [2021-06-05 04:03:49,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:49,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:49,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:49,732 INFO L87 Difference]: Start difference. First operand 403 states and 1116 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:49,830 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-06-05 04:03:49,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:49,830 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:49,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:49,831 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:03:49,831 INFO L226 Difference]: Without dead ends: 492 [2021-06-05 04:03:49,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:49,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-06-05 04:03:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-06-05 04:03:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 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 04:03:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-06-05 04:03:49,836 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-06-05 04:03:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-06-05 04:03:49,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-06-05 04:03:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:49,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:49,836 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,053 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,053 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-06-05 04:03:50,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467272146] [2021-06-05 04:03:50,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467272146] [2021-06-05 04:03:50,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467272146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126239478] [2021-06-05 04:03:50,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126239478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 04:03:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108801659] [2021-06-05 04:03:50,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:50,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:50,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:50,138 INFO L87 Difference]: Start difference. First operand 403 states and 1108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:50,221 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-06-05 04:03:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:50,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:50,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,222 INFO L225 Difference]: With dead ends: 492 [2021-06-05 04:03:50,222 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 04:03:50,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 04:03:50,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-06-05 04:03:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 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 04:03:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-06-05 04:03:50,227 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-06-05 04:03:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:50,227 INFO L482 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-06-05 04:03:50,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-06-05 04:03:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:50,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:50,227 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,428 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,428 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-06-05 04:03:50,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25653906] [2021-06-05 04:03:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25653906] [2021-06-05 04:03:50,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25653906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579054100] [2021-06-05 04:03:50,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:50,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:50,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579054100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:50,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408396988] [2021-06-05 04:03:50,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:50,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:50,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:50,513 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:50,570 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-06-05 04:03:50,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:03:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,571 INFO L225 Difference]: With dead ends: 476 [2021-06-05 04:03:50,572 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 04:03:50,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 04:03:50,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-06-05 04:03:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 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 04:03:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-06-05 04:03:50,576 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-06-05 04:03:50,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:50,577 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-06-05 04:03:50,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,577 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-06-05 04:03:50,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:50,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:50,577 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:50,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-05 04:03:50,785 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-06-05 04:03:50,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:50,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037988894] [2021-06-05 04:03:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:50,826 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:50,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037988894] [2021-06-05 04:03:50,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037988894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582880919] [2021-06-05 04:03:50,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:50,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:50,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:50,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:50,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582880919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:50,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:50,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-06-05 04:03:50,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83081473] [2021-06-05 04:03:50,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:50,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:50,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:50,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:50,870 INFO L87 Difference]: Start difference. First operand 405 states and 1110 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:50,946 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-06-05 04:03:50,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:50,947 INFO L225 Difference]: With dead ends: 496 [2021-06-05 04:03:50,947 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 04:03:50,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 04:03:50,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-06-05 04:03:50,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 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 04:03:50,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-06-05 04:03:50,952 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-06-05 04:03:50,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:50,952 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-06-05 04:03:50,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-06-05 04:03:50,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:50,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:50,953 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:51,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 04:03:51,156 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:51,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:51,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-06-05 04:03:51,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:51,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798508874] [2021-06-05 04:03:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798508874] [2021-06-05 04:03:51,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798508874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388296938] [2021-06-05 04:03:51,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:51,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:51,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:51,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:51,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388296938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-06-05 04:03:51,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385950949] [2021-06-05 04:03:51,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:51,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:51,239 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:03:51,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:51,278 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-06-05 04:03:51,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:03:51,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:51,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:51,279 INFO L225 Difference]: With dead ends: 538 [2021-06-05 04:03:51,279 INFO L226 Difference]: Without dead ends: 538 [2021-06-05 04:03:51,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:51,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-06-05 04:03:51,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-06-05 04:03:51,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 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 04:03:51,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-06-05 04:03:51,284 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-06-05 04:03:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:51,284 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-06-05 04:03:51,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 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 04:03:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-06-05 04:03:51,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:51,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:51,285 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:51,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-05 04:03:51,485 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:51,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-06-05 04:03:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:51,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922333520] [2021-06-05 04:03:51,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:51,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922333520] [2021-06-05 04:03:51,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922333520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740044373] [2021-06-05 04:03:51,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:51,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:51,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:51,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:51,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740044373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:03:51,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69977330] [2021-06-05 04:03:51,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:03:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:03:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:03:51,565 INFO L87 Difference]: Start difference. First operand 410 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:51,645 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-06-05 04:03:51,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:03:51,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:51,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:51,646 INFO L225 Difference]: With dead ends: 512 [2021-06-05 04:03:51,646 INFO L226 Difference]: Without dead ends: 510 [2021-06-05 04:03:51,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-06-05 04:03:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-06-05 04:03:51,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 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 04:03:51,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-06-05 04:03:51,651 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-06-05 04:03:51,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:51,651 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-06-05 04:03:51,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-06-05 04:03:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:51,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:51,651 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:51,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:51,866 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:51,866 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-06-05 04:03:51,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:51,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677547340] [2021-06-05 04:03:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:51,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677547340] [2021-06-05 04:03:51,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677547340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698175726] [2021-06-05 04:03:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:51,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:51,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:51,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:51,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698175726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:51,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:51,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-06-05 04:03:51,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359146063] [2021-06-05 04:03:51,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:03:51,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:51,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:03:51,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:03:51,950 INFO L87 Difference]: Start difference. First operand 410 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,029 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-06-05 04:03:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:03:52,030 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,030 INFO L225 Difference]: With dead ends: 518 [2021-06-05 04:03:52,030 INFO L226 Difference]: Without dead ends: 514 [2021-06-05 04:03:52,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:52,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-06-05 04:03:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-06-05 04:03:52,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 states have internal predecessors, (1111), 0 states have call successors, (0), 0 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 04:03:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-06-05 04:03:52,035 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-06-05 04:03:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,035 INFO L482 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-06-05 04:03:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-06-05 04:03:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:52,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,036 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:52,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-05 04:03:52,249 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-06-05 04:03:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:52,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399772774] [2021-06-05 04:03:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:52,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399772774] [2021-06-05 04:03:52,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399772774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122285805] [2021-06-05 04:03:52,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:52,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:52,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:52,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:52,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122285805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:52,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:03:52,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377228073] [2021-06-05 04:03:52,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:52,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:52,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:52,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:52,349 INFO L87 Difference]: Start difference. First operand 410 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,461 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-06-05 04:03:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:52,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:52,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,462 INFO L225 Difference]: With dead ends: 523 [2021-06-05 04:03:52,462 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 04:03:52,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:52,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 04:03:52,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-06-05 04:03:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 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 04:03:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-06-05 04:03:52,467 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-06-05 04:03:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,467 INFO L482 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-06-05 04:03:52,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-06-05 04:03:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:52,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,468 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:52,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:52,684 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-06-05 04:03:52,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:52,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328234969] [2021-06-05 04:03:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328234969] [2021-06-05 04:03:52,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328234969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137185719] [2021-06-05 04:03:52,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:52,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:03:52,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:52,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:52,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:52,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137185719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:52,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:52,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:03:52,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301357915] [2021-06-05 04:03:52,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:52,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:52,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:52,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:52,791 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:52,889 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-06-05 04:03:52,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:52,890 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:52,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:52,890 INFO L225 Difference]: With dead ends: 574 [2021-06-05 04:03:52,890 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 04:03:52,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 04:03:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-06-05 04:03:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 states have internal predecessors, (1123), 0 states have call successors, (0), 0 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 04:03:52,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-06-05 04:03:52,896 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-06-05 04:03:52,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:52,896 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-06-05 04:03:52,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-06-05 04:03:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:52,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:52,897 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-05 04:03:53,097 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,098 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-06-05 04:03:53,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524514333] [2021-06-05 04:03:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524514333] [2021-06-05 04:03:53,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524514333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793940313] [2021-06-05 04:03:53,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:53,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:53,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793940313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:53,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:03:53,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958536695] [2021-06-05 04:03:53,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:53,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:53,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:53,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:53,195 INFO L87 Difference]: Start difference. First operand 420 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:53,285 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-06-05 04:03:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:53,285 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:53,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:53,286 INFO L225 Difference]: With dead ends: 565 [2021-06-05 04:03:53,286 INFO L226 Difference]: Without dead ends: 565 [2021-06-05 04:03:53,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:03:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-06-05 04:03:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-06-05 04:03:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 04:03:53,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-06-05 04:03:53,305 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-06-05 04:03:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:53,305 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-06-05 04:03:53,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-06-05 04:03:53,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:53,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:53,306 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,521 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-06-05 04:03:53,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503389186] [2021-06-05 04:03:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503389186] [2021-06-05 04:03:53,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503389186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766716831] [2021-06-05 04:03:53,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:53,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:53,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766716831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:53,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:03:53,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480361132] [2021-06-05 04:03:53,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:53,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:53,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:53,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:53,630 INFO L87 Difference]: Start difference. First operand 444 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:53,724 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-06-05 04:03:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:53,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:53,725 INFO L225 Difference]: With dead ends: 566 [2021-06-05 04:03:53,725 INFO L226 Difference]: Without dead ends: 558 [2021-06-05 04:03:53,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:03:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-06-05 04:03:53,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-06-05 04:03:53,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 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 04:03:53,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-06-05 04:03:53,730 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-06-05 04:03:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:53,730 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-06-05 04:03:53,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:53,730 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-06-05 04:03:53,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:53,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:53,731 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:53,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:53,945 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-06-05 04:03:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:53,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362521310] [2021-06-05 04:03:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:53,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362521310] [2021-06-05 04:03:53,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362521310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:53,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845611873] [2021-06-05 04:03:53,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:54,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:03:54,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:54,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845611873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-06-05 04:03:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897574887] [2021-06-05 04:03:54,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:54,045 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:03:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:54,100 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-06-05 04:03:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:03:54,100 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:54,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,101 INFO L225 Difference]: With dead ends: 642 [2021-06-05 04:03:54,101 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 04:03:54,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:54,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 04:03:54,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-06-05 04:03:54,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 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 04:03:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-06-05 04:03:54,106 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-06-05 04:03:54,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:54,106 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-06-05 04:03:54,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:03:54,106 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-06-05 04:03:54,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:54,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:54,107 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:54,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:54,307 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:54,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:54,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-06-05 04:03:54,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:54,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932294767] [2021-06-05 04:03:54,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:54,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932294767] [2021-06-05 04:03:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932294767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777075593] [2021-06-05 04:03:54,352 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:54,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:54,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777075593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-06-05 04:03:54,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306862011] [2021-06-05 04:03:54,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:03:54,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:03:54,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:03:54,410 INFO L87 Difference]: Start difference. First operand 497 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:54,483 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-06-05 04:03:54,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:54,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,484 INFO L225 Difference]: With dead ends: 618 [2021-06-05 04:03:54,484 INFO L226 Difference]: Without dead ends: 616 [2021-06-05 04:03:54,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:03:54,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-06-05 04:03:54,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-06-05 04:03:54,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 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 04:03:54,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-06-05 04:03:54,490 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-06-05 04:03:54,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:54,490 INFO L482 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-06-05 04:03:54,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,490 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-06-05 04:03:54,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:54,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:54,491 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:54,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-05 04:03:54,705 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-06-05 04:03:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:54,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255284598] [2021-06-05 04:03:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:54,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255284598] [2021-06-05 04:03:54,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255284598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870270994] [2021-06-05 04:03:54,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:54,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:54,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:54,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:54,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:54,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870270994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:54,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:54,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-06-05 04:03:54,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963508870] [2021-06-05 04:03:54,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:54,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:54,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:54,807 INFO L87 Difference]: Start difference. First operand 497 states and 1381 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:54,891 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-06-05 04:03:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:54,892 INFO L225 Difference]: With dead ends: 624 [2021-06-05 04:03:54,892 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 04:03:54,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:54,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 04:03:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-06-05 04:03:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 states have internal predecessors, (1396), 0 states have call successors, (0), 0 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 04:03:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-06-05 04:03:54,897 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-06-05 04:03:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:54,898 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-06-05 04:03:54,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:54,898 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-06-05 04:03:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:54,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:54,899 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,107 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-06-05 04:03:55,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525131948] [2021-06-05 04:03:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:55,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525131948] [2021-06-05 04:03:55,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525131948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272931484] [2021-06-05 04:03:55,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:03:55,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:55,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 04:03:55,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:55,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272931484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:55,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-06-05 04:03:55,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427110686] [2021-06-05 04:03:55,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:03:55,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:55,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:03:55,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:03:55,225 INFO L87 Difference]: Start difference. First operand 502 states and 1396 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:55,313 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-06-05 04:03:55,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:55,313 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:55,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:55,314 INFO L225 Difference]: With dead ends: 723 [2021-06-05 04:03:55,314 INFO L226 Difference]: Without dead ends: 717 [2021-06-05 04:03:55,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:03:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-06-05 04:03:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-06-05 04:03:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 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 04:03:55,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-06-05 04:03:55,320 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-06-05 04:03:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:55,320 INFO L482 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-06-05 04:03:55,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-06-05 04:03:55,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:55,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:55,321 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-05 04:03:55,536 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-06-05 04:03:55,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776767256] [2021-06-05 04:03:55,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:55,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776767256] [2021-06-05 04:03:55,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776767256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36371464] [2021-06-05 04:03:55,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:55,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:55,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:55,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:55,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:55,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36371464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:55,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:55,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-06-05 04:03:55,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911107544] [2021-06-05 04:03:55,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:03:55,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:55,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:03:55,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:03:55,647 INFO L87 Difference]: Start difference. First operand 502 states and 1394 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:55,741 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-06-05 04:03:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:03:55,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:55,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:55,743 INFO L225 Difference]: With dead ends: 736 [2021-06-05 04:03:55,743 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 04:03:55,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:03:55,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 04:03:55,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 04:03:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 04:03:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-06-05 04:03:55,748 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-06-05 04:03:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:55,748 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-06-05 04:03:55,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-06-05 04:03:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:03:55,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:55,749 INFO L521 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:55,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 04:03:55,965 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:55,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:55,966 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-06-05 04:03:55,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:55,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405813687] [2021-06-05 04:03:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:56,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405813687] [2021-06-05 04:03:56,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405813687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322187556] [2021-06-05 04:03:56,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:56,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:03:56,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 04:03:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:56,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:56,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322187556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:56,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-06-05 04:03:56,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702221732] [2021-06-05 04:03:56,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:03:56,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:56,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:03:56,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:03:56,089 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,181 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-06-05 04:03:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:03:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 04:03:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:56,183 INFO L225 Difference]: With dead ends: 575 [2021-06-05 04:03:56,183 INFO L226 Difference]: Without dead ends: 570 [2021-06-05 04:03:56,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:03:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-06-05 04:03:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-06-05 04:03:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 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 04:03:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-06-05 04:03:56,188 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-06-05 04:03:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,189 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-06-05 04:03:56,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-06-05 04:03:56,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:56,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,190 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:56,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:56,401 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:56,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:56,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-06-05 04:03:56,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:56,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92720339] [2021-06-05 04:03:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:56,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92720339] [2021-06-05 04:03:56,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92720339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695071714] [2021-06-05 04:03:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:56,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:03:56,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:56,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:56,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:56,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:03:56,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:56,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:56,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:56,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:56,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695071714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:56,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:56,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:03:56,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106660210] [2021-06-05 04:03:56,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:56,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:56,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:56,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:56,720 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:56,833 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-06-05 04:03:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:56,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:03:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:56,835 INFO L225 Difference]: With dead ends: 610 [2021-06-05 04:03:56,835 INFO L226 Difference]: Without dead ends: 607 [2021-06-05 04:03:56,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-06-05 04:03:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-06-05 04:03:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 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 04:03:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-06-05 04:03:56,840 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-06-05 04:03:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:56,840 INFO L482 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-06-05 04:03:56,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:56,840 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-06-05 04:03:56,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:56,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:56,841 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:57,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,061 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:57,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:57,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-06-05 04:03:57,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:57,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659696242] [2021-06-05 04:03:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:57,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:57,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659696242] [2021-06-05 04:03:57,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659696242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578047049] [2021-06-05 04:03:57,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:03:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:57,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,270 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:03:57,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:57,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:57,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:57,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:57,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578047049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:57,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:03:57,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905825799] [2021-06-05 04:03:57,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:57,461 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:57,553 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-06-05 04:03:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:03:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:57,554 INFO L225 Difference]: With dead ends: 674 [2021-06-05 04:03:57,554 INFO L226 Difference]: Without dead ends: 671 [2021-06-05 04:03:57,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-06-05 04:03:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-06-05 04:03:57,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 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 04:03:57,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-06-05 04:03:57,560 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-06-05 04:03:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:57,560 INFO L482 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-06-05 04:03:57,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-06-05 04:03:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:57,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:57,561 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:57,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,777 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-06-05 04:03:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:57,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793152435] [2021-06-05 04:03:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793152435] [2021-06-05 04:03:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793152435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201745770] [2021-06-05 04:03:57,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:57,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:03:57,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:57,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:57,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:57,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:57,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:03:58,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:58,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:58,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:58,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:58,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201745770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:58,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:03:58,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083525327] [2021-06-05 04:03:58,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:58,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:58,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:58,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:58,319 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:58,423 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-06-05 04:03:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:03:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:58,425 INFO L225 Difference]: With dead ends: 731 [2021-06-05 04:03:58,425 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 04:03:58,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 04:03:58,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-06-05 04:03:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 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 04:03:58,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-06-05 04:03:58,432 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-06-05 04:03:58,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:58,432 INFO L482 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-06-05 04:03:58,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:58,432 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-06-05 04:03:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:58,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:58,433 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:58,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:03:58,649 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:58,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:58,649 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-06-05 04:03:58,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:58,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877171740] [2021-06-05 04:03:58,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:03:58,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877171740] [2021-06-05 04:03:58,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877171740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:58,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315191693] [2021-06-05 04:03:58,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:58,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:03:58,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:58,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:58,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:58,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:58,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:03:59,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:59,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:59,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:59,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315191693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:59,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:03:59,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956705808] [2021-06-05 04:03:59,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:59,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:59,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:59,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:59,120 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:59,268 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-06-05 04:03:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:03:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:59,270 INFO L225 Difference]: With dead ends: 778 [2021-06-05 04:03:59,270 INFO L226 Difference]: Without dead ends: 775 [2021-06-05 04:03:59,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-06-05 04:03:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-06-05 04:03:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 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 04:03:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-06-05 04:03:59,281 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-06-05 04:03:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:59,282 INFO L482 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-06-05 04:03:59,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,282 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-06-05 04:03:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:59,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:59,283 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:03:59,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-05 04:03:59,498 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:03:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:03:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-06-05 04:03:59,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:03:59,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442122060] [2021-06-05 04:03:59,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:03:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:03:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:03:59,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:03:59,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442122060] [2021-06-05 04:03:59,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442122060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90110826] [2021-06-05 04:03:59,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:03:59,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:03:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:03:59,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:03:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:03:59,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:59,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:03:59,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:03:59,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:03:59,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:03:59,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:03:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:03:59,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90110826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:03:59,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:03:59,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:03:59,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56789778] [2021-06-05 04:03:59,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:03:59,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:03:59,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:03:59,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:59,800 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:03:59,914 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-06-05 04:03:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:03:59,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:03:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:03:59,916 INFO L225 Difference]: With dead ends: 823 [2021-06-05 04:03:59,916 INFO L226 Difference]: Without dead ends: 820 [2021-06-05 04:03:59,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:03:59,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-06-05 04:03:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-06-05 04:03:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 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 04:03:59,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-06-05 04:03:59,924 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-06-05 04:03:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:03:59,924 INFO L482 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-06-05 04:03:59,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:03:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-06-05 04:03:59,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:03:59,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:03:59,925 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:00,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:00,141 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:00,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-06-05 04:04:00,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:00,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71866589] [2021-06-05 04:04:00,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:00,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:00,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71866589] [2021-06-05 04:04:00,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71866589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733587242] [2021-06-05 04:04:00,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:00,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:00,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:00,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:00,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:00,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:00,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:04:00,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:04:00,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:00,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:04:00,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:04:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:00,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733587242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:00,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:04:00,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474859298] [2021-06-05 04:04:00,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:00,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:00,490 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:00,632 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-06-05 04:04:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:04:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:00,634 INFO L225 Difference]: With dead ends: 908 [2021-06-05 04:04:00,634 INFO L226 Difference]: Without dead ends: 905 [2021-06-05 04:04:00,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-06-05 04:04:00,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-06-05 04:04:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 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 04:04:00,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-06-05 04:04:00,643 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-06-05 04:04:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:00,643 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-06-05 04:04:00,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-06-05 04:04:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 04:04:00,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:00,644 INFO L521 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:00,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-05 04:04:00,860 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:00,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:00,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-06-05 04:04:00,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:00,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038172696] [2021-06-05 04:04:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:00,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:00,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038172696] [2021-06-05 04:04:00,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038172696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:00,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516966590] [2021-06-05 04:04:00,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:00,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:00,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:00,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:04:00,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:01,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:01,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-06-05 04:04:01,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:04:01,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:01,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:04:01,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-06-05 04:04:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516966590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:01,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 04:04:01,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099321511] [2021-06-05 04:04:01,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:01,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:01,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:01,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:01,223 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:01,349 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-06-05 04:04:01,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:01,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 04:04:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:01,351 INFO L225 Difference]: With dead ends: 974 [2021-06-05 04:04:01,351 INFO L226 Difference]: Without dead ends: 971 [2021-06-05 04:04:01,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-06-05 04:04:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-06-05 04:04:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 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 04:04:01,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-06-05 04:04:01,361 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-06-05 04:04:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:01,361 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-06-05 04:04:01,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,361 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-06-05 04:04:01,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:01,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:01,362 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:01,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:01,562 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-06-05 04:04:01,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:01,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068404120] [2021-06-05 04:04:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:01,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068404120] [2021-06-05 04:04:01,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068404120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962620535] [2021-06-05 04:04:01,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:01,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:01,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:01,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962620535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:01,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:01,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:01,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485652359] [2021-06-05 04:04:01,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:01,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:01,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:01,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:01,697 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:01,818 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-06-05 04:04:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:01,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:01,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:01,822 INFO L225 Difference]: With dead ends: 993 [2021-06-05 04:04:01,822 INFO L226 Difference]: Without dead ends: 993 [2021-06-05 04:04:01,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:01,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-06-05 04:04:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-06-05 04:04:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 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 04:04:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-06-05 04:04:01,831 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-06-05 04:04:01,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:01,831 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-06-05 04:04:01,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:01,831 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-06-05 04:04:01,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:01,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:01,832 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 04:04:02,048 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-06-05 04:04:02,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412401932] [2021-06-05 04:04:02,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412401932] [2021-06-05 04:04:02,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412401932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84405826] [2021-06-05 04:04:02,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:02,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:02,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:02,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84405826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:02,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:02,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251052101] [2021-06-05 04:04:02,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:02,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:02,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:02,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:02,158 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:02,332 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-06-05 04:04:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:04:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:02,333 INFO L225 Difference]: With dead ends: 1076 [2021-06-05 04:04:02,333 INFO L226 Difference]: Without dead ends: 1067 [2021-06-05 04:04:02,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-06-05 04:04:02,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-06-05 04:04:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 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 04:04:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-06-05 04:04:02,343 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-06-05 04:04:02,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:02,344 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-06-05 04:04:02,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,344 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-06-05 04:04:02,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:02,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:02,345 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2021-06-05 04:04:02,545 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,546 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-06-05 04:04:02,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410411169] [2021-06-05 04:04:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410411169] [2021-06-05 04:04:02,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410411169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574522756] [2021-06-05 04:04:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:02,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:02,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:02,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574522756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:02,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:02,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049072282] [2021-06-05 04:04:02,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:02,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:02,644 INFO L87 Difference]: Start difference. First operand 886 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:02,735 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-06-05 04:04:02,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:02,735 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:02,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:02,736 INFO L225 Difference]: With dead ends: 917 [2021-06-05 04:04:02,736 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 04:04:02,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 04:04:02,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-06-05 04:04:02,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 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 04:04:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-06-05 04:04:02,745 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-06-05 04:04:02,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:02,745 INFO L482 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-06-05 04:04:02,745 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:02,745 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-06-05 04:04:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:02,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:02,746 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:02,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:02,961 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:02,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:02,961 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-06-05 04:04:02,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:02,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6738640] [2021-06-05 04:04:02,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:02,997 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:02,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6738640] [2021-06-05 04:04:02,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6738640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:02,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793701772] [2021-06-05 04:04:02,998 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:03,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:03,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:03,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:03,066 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793701772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:03,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:03,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435235309] [2021-06-05 04:04:03,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:03,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:03,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:03,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:03,067 INFO L87 Difference]: Start difference. First operand 886 states and 2648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,107 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-06-05 04:04:03,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:03,108 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:03,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,109 INFO L225 Difference]: With dead ends: 1091 [2021-06-05 04:04:03,109 INFO L226 Difference]: Without dead ends: 1091 [2021-06-05 04:04:03,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-06-05 04:04:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-06-05 04:04:03,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 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 04:04:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-06-05 04:04:03,119 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-06-05 04:04:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:03,119 INFO L482 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-06-05 04:04:03,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-06-05 04:04:03,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:03,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:03,120 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:03,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable530,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:03,336 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:03,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:03,336 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-06-05 04:04:03,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:03,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575413388] [2021-06-05 04:04:03,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:03,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:03,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:03,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575413388] [2021-06-05 04:04:03,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575413388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364705195] [2021-06-05 04:04:03,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:03,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:03,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:03,430 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364705195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:03,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:03,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565211236] [2021-06-05 04:04:03,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:03,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:03,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:03,431 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,502 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-06-05 04:04:03,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:03,503 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,504 INFO L225 Difference]: With dead ends: 1088 [2021-06-05 04:04:03,504 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 04:04:03,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 04:04:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-06-05 04:04:03,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 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 04:04:03,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-06-05 04:04:03,514 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-06-05 04:04:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:03,514 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-06-05 04:04:03,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-06-05 04:04:03,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:03,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:03,515 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:03,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 04:04:03,729 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:03,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-06-05 04:04:03,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:03,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301007580] [2021-06-05 04:04:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:03,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:03,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301007580] [2021-06-05 04:04:03,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301007580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754010697] [2021-06-05 04:04:03,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:03,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:04:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:03,819 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:03,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754010697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:03,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:03,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:03,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341893312] [2021-06-05 04:04:03,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:03,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:03,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:03,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:03,820 INFO L87 Difference]: Start difference. First operand 899 states and 2680 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:03,913 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-06-05 04:04:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:03,915 INFO L225 Difference]: With dead ends: 1083 [2021-06-05 04:04:03,915 INFO L226 Difference]: Without dead ends: 1081 [2021-06-05 04:04:03,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-06-05 04:04:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-06-05 04:04:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 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 04:04:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-06-05 04:04:03,925 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-06-05 04:04:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:03,926 INFO L482 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-06-05 04:04:03,926 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:03,926 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-06-05 04:04:03,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:03,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:03,927 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 04:04:04,127 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-06-05 04:04:04,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486777758] [2021-06-05 04:04:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486777758] [2021-06-05 04:04:04,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486777758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440451072] [2021-06-05 04:04:04,169 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440451072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:04,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:04,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376104002] [2021-06-05 04:04:04,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:04,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:04,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:04,218 INFO L87 Difference]: Start difference. First operand 907 states and 2707 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:04,317 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-06-05 04:04:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:04,317 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:04,318 INFO L225 Difference]: With dead ends: 1039 [2021-06-05 04:04:04,318 INFO L226 Difference]: Without dead ends: 1037 [2021-06-05 04:04:04,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 64.2ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:04,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-06-05 04:04:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-06-05 04:04:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 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 04:04:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-06-05 04:04:04,327 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-06-05 04:04:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,327 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-06-05 04:04:04,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-06-05 04:04:04,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:04,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,329 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,529 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-06-05 04:04:04,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665498591] [2021-06-05 04:04:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665498591] [2021-06-05 04:04:04,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665498591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276533984] [2021-06-05 04:04:04,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:04,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:04,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276533984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:04,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:04,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304445140] [2021-06-05 04:04:04,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:04,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:04,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:04,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:04,630 INFO L87 Difference]: Start difference. First operand 884 states and 2627 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:04,668 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-06-05 04:04:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:04,669 INFO L225 Difference]: With dead ends: 1108 [2021-06-05 04:04:04,669 INFO L226 Difference]: Without dead ends: 1108 [2021-06-05 04:04:04,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:04,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-06-05 04:04:04,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-06-05 04:04:04,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 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 04:04:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-06-05 04:04:04,680 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-06-05 04:04:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:04,680 INFO L482 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-06-05 04:04:04,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:04,680 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-06-05 04:04:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:04,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:04,681 INFO L521 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:04,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable534 [2021-06-05 04:04:04,901 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:04,901 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-06-05 04:04:04,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:04,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165104022] [2021-06-05 04:04:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:04,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:04,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165104022] [2021-06-05 04:04:04,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165104022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:04,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258372874] [2021-06-05 04:04:04,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:04,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:04,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:04:04,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:04:05,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258372874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:05,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-06-05 04:04:05,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688127505] [2021-06-05 04:04:05,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:04:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:04:05,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:05,049 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 04:04:05,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:05,546 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-06-05 04:04:05,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 04:04:05,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 19 [2021-06-05 04:04:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:05,548 INFO L225 Difference]: With dead ends: 2007 [2021-06-05 04:04:05,548 INFO L226 Difference]: Without dead ends: 1998 [2021-06-05 04:04:05,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 387.4ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 04:04:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-06-05 04:04:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-06-05 04:04:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 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 04:04:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-06-05 04:04:05,564 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-06-05 04:04:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:05,564 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-06-05 04:04:05,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 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 04:04:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-06-05 04:04:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:05,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:05,566 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:05,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable535,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:05,766 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-06-05 04:04:05,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:05,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989540195] [2021-06-05 04:04:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989540195] [2021-06-05 04:04:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989540195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694717707] [2021-06-05 04:04:05,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:05,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:05,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:05,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:05,878 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:05,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694717707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:05,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:05,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:04:05,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088670174] [2021-06-05 04:04:05,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:05,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:05,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:05,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:05,879 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:05,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:05,934 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-06-05 04:04:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:05,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:05,936 INFO L225 Difference]: With dead ends: 1816 [2021-06-05 04:04:05,936 INFO L226 Difference]: Without dead ends: 1816 [2021-06-05 04:04:05,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-06-05 04:04:05,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-06-05 04:04:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 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 04:04:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-06-05 04:04:05,953 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-06-05 04:04:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:05,953 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-06-05 04:04:05,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-06-05 04:04:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:05,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:05,954 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:06,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 04:04:06,165 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:06,165 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-06-05 04:04:06,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:06,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564089449] [2021-06-05 04:04:06,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:06,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564089449] [2021-06-05 04:04:06,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564089449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491688957] [2021-06-05 04:04:06,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:06,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:06,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:06,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:06,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491688957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:06,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:06,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892489173] [2021-06-05 04:04:06,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:06,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:06,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:06,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:06,256 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:06,348 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-06-05 04:04:06,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:06,350 INFO L225 Difference]: With dead ends: 1590 [2021-06-05 04:04:06,350 INFO L226 Difference]: Without dead ends: 1588 [2021-06-05 04:04:06,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:06,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-06-05 04:04:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-06-05 04:04:06,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 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 04:04:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-06-05 04:04:06,365 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-06-05 04:04:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:06,365 INFO L482 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-06-05 04:04:06,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-06-05 04:04:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:06,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:06,367 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:06,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 04:04:06,569 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:06,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:06,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-06-05 04:04:06,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:06,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539513819] [2021-06-05 04:04:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:06,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:06,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539513819] [2021-06-05 04:04:06,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539513819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035743965] [2021-06-05 04:04:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:06,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:06,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:06,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:06,676 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:06,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035743965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:06,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:06,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582336227] [2021-06-05 04:04:06,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:06,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:06,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:06,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:06,677 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:06,719 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-06-05 04:04:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:06,719 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:06,720 INFO L225 Difference]: With dead ends: 1582 [2021-06-05 04:04:06,720 INFO L226 Difference]: Without dead ends: 1582 [2021-06-05 04:04:06,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:06,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-06-05 04:04:06,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-06-05 04:04:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 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 04:04:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-06-05 04:04:06,734 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-06-05 04:04:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:06,734 INFO L482 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-06-05 04:04:06,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-06-05 04:04:06,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:06,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:06,736 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:06,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:06,949 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:06,949 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-06-05 04:04:06,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:06,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062908289] [2021-06-05 04:04:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:06,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062908289] [2021-06-05 04:04:06,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062908289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:06,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222933206] [2021-06-05 04:04:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222933206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:07,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282102909] [2021-06-05 04:04:07,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:07,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:07,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:07,042 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:07,109 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-06-05 04:04:07,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:07,111 INFO L225 Difference]: With dead ends: 1713 [2021-06-05 04:04:07,111 INFO L226 Difference]: Without dead ends: 1713 [2021-06-05 04:04:07,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-06-05 04:04:07,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-06-05 04:04:07,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 states have internal predecessors, (3953), 0 states have call successors, (0), 0 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 04:04:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-06-05 04:04:07,130 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-06-05 04:04:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,130 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-06-05 04:04:07,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-06-05 04:04:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:07,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,132 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,332 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-06-05 04:04:07,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58832733] [2021-06-05 04:04:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58832733] [2021-06-05 04:04:07,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58832733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681522008] [2021-06-05 04:04:07,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:07,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:07,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681522008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:07,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318259405] [2021-06-05 04:04:07,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:07,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:07,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:07,427 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:07,525 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-06-05 04:04:07,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:07,526 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:07,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:07,528 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 04:04:07,528 INFO L226 Difference]: Without dead ends: 2155 [2021-06-05 04:04:07,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 67.5ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-06-05 04:04:07,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-06-05 04:04:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 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 04:04:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-06-05 04:04:07,549 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-06-05 04:04:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,549 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-06-05 04:04:07,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-06-05 04:04:07,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:07,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,551 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:07,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 04:04:07,761 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:07,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:07,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-06-05 04:04:07,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:07,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063843220] [2021-06-05 04:04:07,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:07,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:07,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:07,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063843220] [2021-06-05 04:04:07,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063843220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575105447] [2021-06-05 04:04:07,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:07,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:07,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:07,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:07,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:07,843 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:04:07,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575105447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:07,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:07,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-05 04:04:07,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231869309] [2021-06-05 04:04:07,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:04:07,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:07,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:04:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:04:07,844 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:07,927 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-06-05 04:04:07,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:07,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:07,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:07,929 INFO L225 Difference]: With dead ends: 1877 [2021-06-05 04:04:07,929 INFO L226 Difference]: Without dead ends: 1873 [2021-06-05 04:04:07,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:07,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-06-05 04:04:07,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-06-05 04:04:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 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 04:04:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-06-05 04:04:07,948 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-06-05 04:04:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:07,948 INFO L482 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-06-05 04:04:07,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-06-05 04:04:07,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:07,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:07,950 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:08,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 04:04:08,165 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:08,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:08,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-06-05 04:04:08,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:08,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694498011] [2021-06-05 04:04:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:08,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694498011] [2021-06-05 04:04:08,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694498011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488913939] [2021-06-05 04:04:08,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:08,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:08,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:08,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488913939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:08,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:08,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935304356] [2021-06-05 04:04:08,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:08,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:08,268 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:08,347 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-06-05 04:04:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:08,348 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:08,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:08,350 INFO L225 Difference]: With dead ends: 2270 [2021-06-05 04:04:08,350 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 04:04:08,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:08,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 04:04:08,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-06-05 04:04:08,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 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 04:04:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-06-05 04:04:08,367 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-06-05 04:04:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:08,368 INFO L482 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-06-05 04:04:08,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-06-05 04:04:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:08,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:08,369 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:08,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-06-05 04:04:08,570 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:08,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-06-05 04:04:08,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:08,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083550719] [2021-06-05 04:04:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:08,612 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:08,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:08,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083550719] [2021-06-05 04:04:08,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083550719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219316207] [2021-06-05 04:04:08,613 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:08,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:08,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219316207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:08,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:08,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:08,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078391940] [2021-06-05 04:04:08,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:08,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:08,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:08,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:08,663 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:08,752 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-06-05 04:04:08,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:08,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:08,753 INFO L225 Difference]: With dead ends: 1616 [2021-06-05 04:04:08,753 INFO L226 Difference]: Without dead ends: 1612 [2021-06-05 04:04:08,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-05 04:04:08,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-06-05 04:04:08,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 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 04:04:08,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-06-05 04:04:08,768 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-06-05 04:04:08,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:08,768 INFO L482 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-06-05 04:04:08,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:08,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-06-05 04:04:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:08,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:08,770 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:08,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-06-05 04:04:08,970 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:08,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:08,970 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-06-05 04:04:08,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:08,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350187752] [2021-06-05 04:04:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350187752] [2021-06-05 04:04:09,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350187752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3067908] [2021-06-05 04:04:09,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:09,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:09,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:09,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:09,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3067908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:09,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:09,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167848180] [2021-06-05 04:04:09,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:09,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:09,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:09,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:09,067 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,116 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-06-05 04:04:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:09,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,118 INFO L225 Difference]: With dead ends: 1671 [2021-06-05 04:04:09,118 INFO L226 Difference]: Without dead ends: 1671 [2021-06-05 04:04:09,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-06-05 04:04:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-06-05 04:04:09,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 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 04:04:09,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-06-05 04:04:09,131 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-06-05 04:04:09,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,132 INFO L482 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-06-05 04:04:09,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-06-05 04:04:09,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:09,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:09,133 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:09,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable544 [2021-06-05 04:04:09,349 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:09,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:09,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-06-05 04:04:09,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:09,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041549005] [2021-06-05 04:04:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:09,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041549005] [2021-06-05 04:04:09,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041549005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309141001] [2021-06-05 04:04:09,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:09,443 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:09,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309141001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:09,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:04:09,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742032436] [2021-06-05 04:04:09,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:09,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:09,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:09,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:09,444 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,495 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-06-05 04:04:09,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:09,495 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:09,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,496 INFO L225 Difference]: With dead ends: 1578 [2021-06-05 04:04:09,496 INFO L226 Difference]: Without dead ends: 1578 [2021-06-05 04:04:09,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-06-05 04:04:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-06-05 04:04:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 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 04:04:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-06-05 04:04:09,509 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-06-05 04:04:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,510 INFO L482 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-06-05 04:04:09,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-06-05 04:04:09,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:09,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:09,511 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:09,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 04:04:09,711 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-06-05 04:04:09,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:09,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194409999] [2021-06-05 04:04:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194409999] [2021-06-05 04:04:09,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194409999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849116342] [2021-06-05 04:04:09,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:09,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:09,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:09,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:09,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:09,820 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:09,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849116342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:09,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:09,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:09,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099717185] [2021-06-05 04:04:09,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:09,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:09,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:09,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:09,821 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:09,903 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-06-05 04:04:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:09,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:09,905 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 04:04:09,905 INFO L226 Difference]: Without dead ends: 1698 [2021-06-05 04:04:09,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-06-05 04:04:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-06-05 04:04:09,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 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 04:04:09,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-06-05 04:04:09,918 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-06-05 04:04:09,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:09,918 INFO L482 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-06-05 04:04:09,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:09,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-06-05 04:04:09,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:09,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:09,919 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:10,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-06-05 04:04:10,135 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:10,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:10,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-06-05 04:04:10,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:10,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868447414] [2021-06-05 04:04:10,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868447414] [2021-06-05 04:04:10,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868447414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743359594] [2021-06-05 04:04:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:10,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743359594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:10,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:10,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631934586] [2021-06-05 04:04:10,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:10,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:10,244 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:10,363 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-06-05 04:04:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:04:10,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:10,365 INFO L225 Difference]: With dead ends: 2138 [2021-06-05 04:04:10,365 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 04:04:10,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:10,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 04:04:10,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-06-05 04:04:10,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 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 04:04:10,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-06-05 04:04:10,382 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-06-05 04:04:10,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:10,382 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-06-05 04:04:10,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-06-05 04:04:10,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:10,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,384 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:10,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,584 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-06-05 04:04:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:10,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439166358] [2021-06-05 04:04:10,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:10,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439166358] [2021-06-05 04:04:10,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439166358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797315724] [2021-06-05 04:04:10,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:10,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:10,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:10,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:10,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797315724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:10,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:10,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:10,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170039067] [2021-06-05 04:04:10,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:10,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:10,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:10,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:10,687 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:10,800 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-06-05 04:04:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:10,802 INFO L225 Difference]: With dead ends: 1994 [2021-06-05 04:04:10,802 INFO L226 Difference]: Without dead ends: 1994 [2021-06-05 04:04:10,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-06-05 04:04:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-06-05 04:04:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 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 04:04:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-06-05 04:04:10,816 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-06-05 04:04:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:10,816 INFO L482 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-06-05 04:04:10,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-06-05 04:04:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:10,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:10,817 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:11,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,018 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-06-05 04:04:11,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:11,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940161106] [2021-06-05 04:04:11,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940161106] [2021-06-05 04:04:11,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940161106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790767826] [2021-06-05 04:04:11,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:11,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:11,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:11,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790767826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:11,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445892600] [2021-06-05 04:04:11,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:11,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:11,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:11,105 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,203 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-06-05 04:04:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:11,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:11,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:11,205 INFO L225 Difference]: With dead ends: 1394 [2021-06-05 04:04:11,205 INFO L226 Difference]: Without dead ends: 1390 [2021-06-05 04:04:11,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-06-05 04:04:11,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-06-05 04:04:11,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 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 04:04:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-06-05 04:04:11,217 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-06-05 04:04:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:11,217 INFO L482 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-06-05 04:04:11,217 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,217 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-06-05 04:04:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:11,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:11,218 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:11,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,434 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-06-05 04:04:11,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:11,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878200766] [2021-06-05 04:04:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:11,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:11,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878200766] [2021-06-05 04:04:11,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878200766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719058378] [2021-06-05 04:04:11,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:04:11,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:11,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:11,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:11,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719058378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066696389] [2021-06-05 04:04:11,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:11,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:11,525 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,576 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-06-05 04:04:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:11,576 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:11,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:11,577 INFO L225 Difference]: With dead ends: 1453 [2021-06-05 04:04:11,577 INFO L226 Difference]: Without dead ends: 1453 [2021-06-05 04:04:11,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:11,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-06-05 04:04:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-06-05 04:04:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 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 04:04:11,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-06-05 04:04:11,590 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-06-05 04:04:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:11,590 INFO L482 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-06-05 04:04:11,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-06-05 04:04:11,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:11,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:11,591 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:11,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,807 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:11,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:11,807 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-06-05 04:04:11,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:11,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595854380] [2021-06-05 04:04:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595854380] [2021-06-05 04:04:11,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595854380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381965680] [2021-06-05 04:04:11,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:11,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:11,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:11,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381965680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:11,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:11,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:11,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449869314] [2021-06-05 04:04:11,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:11,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:11,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:11,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:11,909 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:11,968 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-06-05 04:04:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:11,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:11,970 INFO L225 Difference]: With dead ends: 1449 [2021-06-05 04:04:11,970 INFO L226 Difference]: Without dead ends: 1449 [2021-06-05 04:04:11,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:11,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-06-05 04:04:11,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-06-05 04:04:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 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 04:04:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-06-05 04:04:11,982 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-06-05 04:04:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:11,982 INFO L482 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-06-05 04:04:11,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-06-05 04:04:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:11,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:11,983 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:12,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 04:04:12,184 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:12,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-06-05 04:04:12,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:12,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871521374] [2021-06-05 04:04:12,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:12,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:12,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871521374] [2021-06-05 04:04:12,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871521374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007498808] [2021-06-05 04:04:12,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:12,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:12,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:12,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:12,277 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:12,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007498808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:12,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:12,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449871921] [2021-06-05 04:04:12,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:12,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:12,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:12,278 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:12,325 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-06-05 04:04:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:04:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,327 INFO L225 Difference]: With dead ends: 1670 [2021-06-05 04:04:12,327 INFO L226 Difference]: Without dead ends: 1670 [2021-06-05 04:04:12,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:12,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-06-05 04:04:12,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-06-05 04:04:12,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 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 04:04:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-06-05 04:04:12,346 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-06-05 04:04:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:12,346 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-06-05 04:04:12,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-06-05 04:04:12,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:12,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:12,348 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:12,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 04:04:12,548 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:12,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-06-05 04:04:12,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:12,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16856893] [2021-06-05 04:04:12,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:12,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:12,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:12,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16856893] [2021-06-05 04:04:12,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16856893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892257069] [2021-06-05 04:04:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:12,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:12,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:12,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:12,650 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:12,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892257069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:12,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:12,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:12,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492597290] [2021-06-05 04:04:12,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:12,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:12,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:12,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:12,651 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:12,746 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-06-05 04:04:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:12,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:12,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:12,748 INFO L225 Difference]: With dead ends: 1718 [2021-06-05 04:04:12,748 INFO L226 Difference]: Without dead ends: 1718 [2021-06-05 04:04:12,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:12,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-06-05 04:04:12,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-06-05 04:04:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 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 04:04:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-06-05 04:04:12,763 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-06-05 04:04:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:12,763 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-06-05 04:04:12,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-06-05 04:04:12,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:12,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:12,764 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:12,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2021-06-05 04:04:12,965 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:12,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:12,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-06-05 04:04:12,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:12,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501732408] [2021-06-05 04:04:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:13,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501732408] [2021-06-05 04:04:13,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501732408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136199457] [2021-06-05 04:04:13,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:13,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:13,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:13,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136199457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:13,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:13,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061050818] [2021-06-05 04:04:13,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:13,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:13,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:13,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:13,072 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:13,219 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-06-05 04:04:13,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:13,220 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:13,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:13,222 INFO L225 Difference]: With dead ends: 1961 [2021-06-05 04:04:13,222 INFO L226 Difference]: Without dead ends: 1961 [2021-06-05 04:04:13,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:13,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-06-05 04:04:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-06-05 04:04:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 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 04:04:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-06-05 04:04:13,239 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-06-05 04:04:13,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:13,239 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-06-05 04:04:13,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-06-05 04:04:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:13,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:13,241 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:13,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 04:04:13,453 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:13,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-06-05 04:04:13,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:13,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297299288] [2021-06-05 04:04:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297299288] [2021-06-05 04:04:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297299288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634521546] [2021-06-05 04:04:13,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:13,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:13,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:13,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634521546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:13,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:13,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662071885] [2021-06-05 04:04:13,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:13,540 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:13,664 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-06-05 04:04:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:13,664 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:13,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:13,666 INFO L225 Difference]: With dead ends: 1862 [2021-06-05 04:04:13,666 INFO L226 Difference]: Without dead ends: 1856 [2021-06-05 04:04:13,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-06-05 04:04:13,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-06-05 04:04:13,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 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 04:04:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-06-05 04:04:13,683 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-06-05 04:04:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:13,683 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-06-05 04:04:13,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-06-05 04:04:13,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:13,685 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:13,685 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:13,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:13,886 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:13,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:13,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-06-05 04:04:13,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:13,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15258853] [2021-06-05 04:04:13,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:13,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:13,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15258853] [2021-06-05 04:04:13,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15258853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087469368] [2021-06-05 04:04:13,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:13,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:13,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087469368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:13,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:13,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:13,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998383741] [2021-06-05 04:04:13,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:13,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:13,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:13,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:13,992 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:14,040 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-06-05 04:04:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:04:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:14,043 INFO L225 Difference]: With dead ends: 1907 [2021-06-05 04:04:14,043 INFO L226 Difference]: Without dead ends: 1907 [2021-06-05 04:04:14,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 48.9ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:14,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-06-05 04:04:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-06-05 04:04:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 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 04:04:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-06-05 04:04:14,059 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-06-05 04:04:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:14,059 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-06-05 04:04:14,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-06-05 04:04:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:14,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:14,061 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:14,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-06-05 04:04:14,262 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:14,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:14,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-06-05 04:04:14,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:14,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458497532] [2021-06-05 04:04:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:14,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458497532] [2021-06-05 04:04:14,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458497532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643045930] [2021-06-05 04:04:14,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643045930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:14,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407281134] [2021-06-05 04:04:14,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:14,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:14,360 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:14,450 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-06-05 04:04:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:14,452 INFO L225 Difference]: With dead ends: 1965 [2021-06-05 04:04:14,452 INFO L226 Difference]: Without dead ends: 1965 [2021-06-05 04:04:14,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:14,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-06-05 04:04:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-06-05 04:04:14,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 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 04:04:14,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-06-05 04:04:14,467 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-06-05 04:04:14,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:14,467 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-06-05 04:04:14,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,467 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-06-05 04:04:14,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:14,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:14,468 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:14,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,669 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:14,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:14,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-06-05 04:04:14,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:14,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258298763] [2021-06-05 04:04:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:14,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:14,718 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258298763] [2021-06-05 04:04:14,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258298763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333136231] [2021-06-05 04:04:14,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:14,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:14,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:14,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:14,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333136231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:14,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:14,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:14,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390223063] [2021-06-05 04:04:14,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:14,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:14,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:14,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:14,777 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:14,920 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-06-05 04:04:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:14,920 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:14,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:14,922 INFO L225 Difference]: With dead ends: 1975 [2021-06-05 04:04:14,922 INFO L226 Difference]: Without dead ends: 1975 [2021-06-05 04:04:14,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-06-05 04:04:14,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-06-05 04:04:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 states have internal predecessors, (4015), 0 states have call successors, (0), 0 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 04:04:14,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-06-05 04:04:14,936 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-06-05 04:04:14,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:14,936 INFO L482 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-06-05 04:04:14,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-06-05 04:04:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:14,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:14,938 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:15,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 04:04:15,145 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-06-05 04:04:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:15,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173931982] [2021-06-05 04:04:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:15,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:15,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173931982] [2021-06-05 04:04:15,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173931982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086029303] [2021-06-05 04:04:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:15,229 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:15,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086029303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:15,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:15,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497024569] [2021-06-05 04:04:15,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:15,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:15,230 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,335 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-06-05 04:04:15,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:15,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:15,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:15,337 INFO L225 Difference]: With dead ends: 1517 [2021-06-05 04:04:15,337 INFO L226 Difference]: Without dead ends: 1513 [2021-06-05 04:04:15,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-06-05 04:04:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-06-05 04:04:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 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 04:04:15,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-06-05 04:04:15,351 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-06-05 04:04:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:15,351 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-06-05 04:04:15,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-06-05 04:04:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:15,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:15,353 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:15,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-06-05 04:04:15,553 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:15,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-06-05 04:04:15,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:15,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454063283] [2021-06-05 04:04:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:15,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454063283] [2021-06-05 04:04:15,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454063283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437962098] [2021-06-05 04:04:15,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:15,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:15,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:15,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:15,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437962098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:15,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:15,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:15,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145195024] [2021-06-05 04:04:15,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:15,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:15,664 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:15,803 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-06-05 04:04:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:15,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:15,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:15,805 INFO L225 Difference]: With dead ends: 1622 [2021-06-05 04:04:15,805 INFO L226 Difference]: Without dead ends: 1622 [2021-06-05 04:04:15,805 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:15,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-06-05 04:04:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-06-05 04:04:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 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 04:04:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-06-05 04:04:15,818 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-06-05 04:04:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:15,819 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-06-05 04:04:15,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-06-05 04:04:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:15,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:15,820 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,036 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-06-05 04:04:16,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649883654] [2021-06-05 04:04:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649883654] [2021-06-05 04:04:16,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649883654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956975721] [2021-06-05 04:04:16,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:16,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:16,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956975721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:16,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868431171] [2021-06-05 04:04:16,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:16,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:16,121 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:16,208 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-06-05 04:04:16,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:16,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:16,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,209 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 04:04:16,209 INFO L226 Difference]: Without dead ends: 1372 [2021-06-05 04:04:16,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:16,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-06-05 04:04:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-06-05 04:04:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 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 04:04:16,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-06-05 04:04:16,222 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-06-05 04:04:16,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,222 INFO L482 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-06-05 04:04:16,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-06-05 04:04:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:16,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,223 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,437 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-06-05 04:04:16,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394961946] [2021-06-05 04:04:16,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,473 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394961946] [2021-06-05 04:04:16,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394961946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433520259] [2021-06-05 04:04:16,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:16,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:16,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433520259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:16,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256508701] [2021-06-05 04:04:16,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:16,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:16,526 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:16,592 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-06-05 04:04:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,594 INFO L225 Difference]: With dead ends: 1459 [2021-06-05 04:04:16,594 INFO L226 Difference]: Without dead ends: 1459 [2021-06-05 04:04:16,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:16,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-06-05 04:04:16,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-06-05 04:04:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-06-05 04:04:16,606 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-06-05 04:04:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:16,606 INFO L482 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-06-05 04:04:16,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-06-05 04:04:16,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:16,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:16,608 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:16,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 04:04:16,808 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:16,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:16,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-06-05 04:04:16,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:16,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148189008] [2021-06-05 04:04:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:16,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148189008] [2021-06-05 04:04:16,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148189008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112685897] [2021-06-05 04:04:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:16,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:16,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:16,902 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:16,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112685897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:16,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:16,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:04:16,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445912702] [2021-06-05 04:04:16,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:16,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:16,903 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:16,993 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-06-05 04:04:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:16,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:16,994 INFO L225 Difference]: With dead ends: 1479 [2021-06-05 04:04:16,994 INFO L226 Difference]: Without dead ends: 1479 [2021-06-05 04:04:16,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:16,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-06-05 04:04:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-06-05 04:04:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 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 04:04:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-06-05 04:04:17,007 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-06-05 04:04:17,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,007 INFO L482 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-06-05 04:04:17,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-06-05 04:04:17,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:17,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:17,008 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:17,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:17,210 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:17,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:17,210 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-06-05 04:04:17,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:17,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178081349] [2021-06-05 04:04:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:17,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:17,256 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:17,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:17,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178081349] [2021-06-05 04:04:17,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178081349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750953055] [2021-06-05 04:04:17,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:17,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:17,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:17,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:17,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750953055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:17,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:17,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414083351] [2021-06-05 04:04:17,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:17,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:17,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:17,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:17,314 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:17,389 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-06-05 04:04:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:17,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:17,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:17,391 INFO L225 Difference]: With dead ends: 1443 [2021-06-05 04:04:17,391 INFO L226 Difference]: Without dead ends: 1443 [2021-06-05 04:04:17,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 72.9ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:17,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-06-05 04:04:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-06-05 04:04:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 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 04:04:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-06-05 04:04:17,403 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-06-05 04:04:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,403 INFO L482 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-06-05 04:04:17,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-06-05 04:04:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:17,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:17,404 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:17,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 04:04:17,614 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:17,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:17,614 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-06-05 04:04:17,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:17,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552310513] [2021-06-05 04:04:17,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:17,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552310513] [2021-06-05 04:04:17,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552310513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186740925] [2021-06-05 04:04:17,654 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:17,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:17,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:17,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:17,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:17,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186740925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:17,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:17,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:17,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896667345] [2021-06-05 04:04:17,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:17,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:17,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:17,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:17,723 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:17,785 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-06-05 04:04:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:17,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:17,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:17,787 INFO L225 Difference]: With dead ends: 1646 [2021-06-05 04:04:17,787 INFO L226 Difference]: Without dead ends: 1646 [2021-06-05 04:04:17,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:17,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-06-05 04:04:17,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-06-05 04:04:17,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 04:04:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 04:04:17,801 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 04:04:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:17,801 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 04:04:17,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 04:04:17,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:17,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:17,802 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:18,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-05 04:04:18,004 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:18,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:18,004 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-06-05 04:04:18,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:18,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476552881] [2021-06-05 04:04:18,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:18,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476552881] [2021-06-05 04:04:18,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476552881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756253556] [2021-06-05 04:04:18,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:18,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:18,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:18,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:18,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756253556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:18,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102725306] [2021-06-05 04:04:18,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:18,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:18,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:18,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:18,127 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:18,253 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-06-05 04:04:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,255 INFO L225 Difference]: With dead ends: 1661 [2021-06-05 04:04:18,255 INFO L226 Difference]: Without dead ends: 1661 [2021-06-05 04:04:18,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 102.3ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:18,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-06-05 04:04:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-06-05 04:04:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 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 04:04:18,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-06-05 04:04:18,270 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-06-05 04:04:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:18,270 INFO L482 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-06-05 04:04:18,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-06-05 04:04:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:18,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:18,271 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:18,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-06-05 04:04:18,487 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:18,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-06-05 04:04:18,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:18,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238942062] [2021-06-05 04:04:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:18,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238942062] [2021-06-05 04:04:18,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238942062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302719198] [2021-06-05 04:04:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:18,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:18,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:18,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:18,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302719198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:18,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:18,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:18,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324280869] [2021-06-05 04:04:18,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:18,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:18,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:18,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:18,600 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:18,786 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-06-05 04:04:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:18,786 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:18,788 INFO L225 Difference]: With dead ends: 1853 [2021-06-05 04:04:18,788 INFO L226 Difference]: Without dead ends: 1853 [2021-06-05 04:04:18,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-06-05 04:04:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-06-05 04:04:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 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 04:04:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-06-05 04:04:18,804 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-06-05 04:04:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:18,804 INFO L482 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-06-05 04:04:18,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:18,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-06-05 04:04:18,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:18,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:18,806 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:19,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,019 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-06-05 04:04:19,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:19,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527691196] [2021-06-05 04:04:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:19,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527691196] [2021-06-05 04:04:19,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527691196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353486642] [2021-06-05 04:04:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:19,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:19,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353486642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:04:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204104574] [2021-06-05 04:04:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:19,143 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:19,316 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-06-05 04:04:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:04:19,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:19,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:19,318 INFO L225 Difference]: With dead ends: 1749 [2021-06-05 04:04:19,318 INFO L226 Difference]: Without dead ends: 1743 [2021-06-05 04:04:19,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-06-05 04:04:19,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-06-05 04:04:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 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 04:04:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-06-05 04:04:19,333 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-06-05 04:04:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:19,334 INFO L482 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-06-05 04:04:19,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-06-05 04:04:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:19,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:19,335 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:19,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 04:04:19,542 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:19,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-06-05 04:04:19,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:19,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341054304] [2021-06-05 04:04:19,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:19,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:19,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341054304] [2021-06-05 04:04:19,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341054304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654002344] [2021-06-05 04:04:19,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:19,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:19,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:19,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654002344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:19,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:19,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-05 04:04:19,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474902956] [2021-06-05 04:04:19,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:19,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:19,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:19,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:19,662 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:19,788 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-06-05 04:04:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:04:19,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:19,790 INFO L225 Difference]: With dead ends: 1732 [2021-06-05 04:04:19,790 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 04:04:19,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 04:04:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-06-05 04:04:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 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 04:04:19,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-06-05 04:04:19,805 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-06-05 04:04:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:19,805 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-06-05 04:04:19,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-06-05 04:04:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:19,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:19,807 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:20,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 04:04:20,009 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-06-05 04:04:20,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:20,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515295626] [2021-06-05 04:04:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515295626] [2021-06-05 04:04:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515295626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856494824] [2021-06-05 04:04:20,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:20,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:20,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:20,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:20,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856494824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:20,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 04:04:20,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183640310] [2021-06-05 04:04:20,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:20,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:20,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:20,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:20,155 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:20,365 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-06-05 04:04:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:20,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:20,367 INFO L225 Difference]: With dead ends: 1746 [2021-06-05 04:04:20,367 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 04:04:20,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 188.8ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:04:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 04:04:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-06-05 04:04:20,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 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 04:04:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-06-05 04:04:20,382 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-06-05 04:04:20,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:20,382 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-06-05 04:04:20,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-06-05 04:04:20,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:20,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:20,383 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:20,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:20,584 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-06-05 04:04:20,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:20,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422717712] [2021-06-05 04:04:20,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:20,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422717712] [2021-06-05 04:04:20,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422717712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512330168] [2021-06-05 04:04:20,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:20,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:20,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:20,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:20,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512330168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:20,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:20,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-05 04:04:20,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954525126] [2021-06-05 04:04:20,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:20,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:20,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:20,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:20,730 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:20,978 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-06-05 04:04:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:04:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:20,980 INFO L225 Difference]: With dead ends: 1884 [2021-06-05 04:04:20,980 INFO L226 Difference]: Without dead ends: 1884 [2021-06-05 04:04:20,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:04:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-06-05 04:04:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-06-05 04:04:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 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 04:04:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-06-05 04:04:20,994 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-06-05 04:04:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:20,995 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-06-05 04:04:20,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-06-05 04:04:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:20,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:20,996 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:21,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:21,196 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:21,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:21,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-06-05 04:04:21,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:21,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348970476] [2021-06-05 04:04:21,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348970476] [2021-06-05 04:04:21,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348970476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432600333] [2021-06-05 04:04:21,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:21,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:21,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:21,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:21,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432600333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:21,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-06-05 04:04:21,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688757340] [2021-06-05 04:04:21,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:21,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:21,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:21,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:21,307 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:21,445 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-06-05 04:04:21,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:21,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:21,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:21,446 INFO L225 Difference]: With dead ends: 1607 [2021-06-05 04:04:21,446 INFO L226 Difference]: Without dead ends: 1603 [2021-06-05 04:04:21,447 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:21,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-06-05 04:04:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-06-05 04:04:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 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 04:04:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-06-05 04:04:21,461 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-06-05 04:04:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:21,461 INFO L482 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-06-05 04:04:21,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-06-05 04:04:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:21,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:21,462 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:21,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:21,677 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-06-05 04:04:21,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:21,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112293704] [2021-06-05 04:04:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112293704] [2021-06-05 04:04:21,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112293704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308325743] [2021-06-05 04:04:21,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:21,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:21,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:21,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:21,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:21,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308325743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:21,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:21,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 04:04:21,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646860224] [2021-06-05 04:04:21,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:21,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:21,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:21,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:21,819 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,034 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-06-05 04:04:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:22,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:22,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:22,036 INFO L225 Difference]: With dead ends: 1883 [2021-06-05 04:04:22,036 INFO L226 Difference]: Without dead ends: 1883 [2021-06-05 04:04:22,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:04:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-06-05 04:04:22,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-06-05 04:04:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 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 04:04:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-06-05 04:04:22,053 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-06-05 04:04:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,053 INFO L482 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-06-05 04:04:22,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-06-05 04:04:22,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:22,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,054 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 04:04:22,260 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-06-05 04:04:22,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585510584] [2021-06-05 04:04:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:22,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585510584] [2021-06-05 04:04:22,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585510584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678198194] [2021-06-05 04:04:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:22,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:22,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678198194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 04:04:22,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522507209] [2021-06-05 04:04:22,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:22,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:22,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:22,376 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,486 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-06-05 04:04:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:22,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:22,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:22,487 INFO L225 Difference]: With dead ends: 1804 [2021-06-05 04:04:22,487 INFO L226 Difference]: Without dead ends: 1802 [2021-06-05 04:04:22,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-06-05 04:04:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-06-05 04:04:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 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 04:04:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-06-05 04:04:22,504 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-06-05 04:04:22,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,504 INFO L482 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-06-05 04:04:22,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-06-05 04:04:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:22,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,506 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:22,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-06-05 04:04:22,706 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:22,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-06-05 04:04:22,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:22,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128605403] [2021-06-05 04:04:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:22,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:22,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128605403] [2021-06-05 04:04:22,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128605403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455331083] [2021-06-05 04:04:22,766 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:22,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455331083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-06-05 04:04:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726939231] [2021-06-05 04:04:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:22,824 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:22,940 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-06-05 04:04:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:22,942 INFO L225 Difference]: With dead ends: 1866 [2021-06-05 04:04:22,942 INFO L226 Difference]: Without dead ends: 1866 [2021-06-05 04:04:22,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:22,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-06-05 04:04:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-06-05 04:04:22,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 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 04:04:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-06-05 04:04:22,958 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-06-05 04:04:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:22,959 INFO L482 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-06-05 04:04:22,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-06-05 04:04:22,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:22,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:22,960 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 04:04:23,161 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-06-05 04:04:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577052659] [2021-06-05 04:04:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:23,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:23,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577052659] [2021-06-05 04:04:23,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577052659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663900798] [2021-06-05 04:04:23,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:23,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:23,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:23,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663900798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:23,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 04:04:23,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977000442] [2021-06-05 04:04:23,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:23,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:23,285 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:23,422 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-06-05 04:04:23,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:23,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:23,424 INFO L225 Difference]: With dead ends: 1913 [2021-06-05 04:04:23,424 INFO L226 Difference]: Without dead ends: 1913 [2021-06-05 04:04:23,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-05 04:04:23,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-06-05 04:04:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 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 04:04:23,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-06-05 04:04:23,440 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-06-05 04:04:23,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:23,440 INFO L482 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-06-05 04:04:23,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-06-05 04:04:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:23,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:23,442 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:23,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 04:04:23,657 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:23,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:23,657 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-06-05 04:04:23,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:23,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641585993] [2021-06-05 04:04:23,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:23,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641585993] [2021-06-05 04:04:23,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641585993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335176334] [2021-06-05 04:04:23,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:23,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:23,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335176334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:23,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:23,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-06-05 04:04:23,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797464717] [2021-06-05 04:04:23,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:23,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:23,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:23,785 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:23,961 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-06-05 04:04:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:23,964 INFO L225 Difference]: With dead ends: 2111 [2021-06-05 04:04:23,964 INFO L226 Difference]: Without dead ends: 2111 [2021-06-05 04:04:23,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-06-05 04:04:23,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-06-05 04:04:23,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 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 04:04:23,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-06-05 04:04:23,984 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-06-05 04:04:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:23,984 INFO L482 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-06-05 04:04:23,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:23,984 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-06-05 04:04:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:23,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:23,985 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:24,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:24,186 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-06-05 04:04:24,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:24,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308199592] [2021-06-05 04:04:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308199592] [2021-06-05 04:04:24,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308199592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998060161] [2021-06-05 04:04:24,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:24,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:24,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:24,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998060161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:24,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 04:04:24,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512902854] [2021-06-05 04:04:24,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:24,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:24,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:24,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:24,326 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:24,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:24,496 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-06-05 04:04:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:24,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:24,498 INFO L225 Difference]: With dead ends: 2071 [2021-06-05 04:04:24,498 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 04:04:24,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:04:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 04:04:24,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-06-05 04:04:24,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 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 04:04:24,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-06-05 04:04:24,516 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-06-05 04:04:24,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:24,516 INFO L482 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-06-05 04:04:24,516 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:24,516 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-06-05 04:04:24,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:24,517 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:24,518 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:24,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-06-05 04:04:24,718 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-06-05 04:04:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:24,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504960830] [2021-06-05 04:04:24,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:24,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:24,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:24,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504960830] [2021-06-05 04:04:24,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504960830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819288284] [2021-06-05 04:04:24,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:24,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:24,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:24,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:24,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:24,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819288284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:24,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:24,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-06-05 04:04:24,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908136255] [2021-06-05 04:04:24,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:24,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:24,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:24,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:24,851 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:25,009 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-06-05 04:04:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:25,011 INFO L225 Difference]: With dead ends: 2136 [2021-06-05 04:04:25,011 INFO L226 Difference]: Without dead ends: 2136 [2021-06-05 04:04:25,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 158.9ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-06-05 04:04:25,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-06-05 04:04:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 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 04:04:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-06-05 04:04:25,030 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-06-05 04:04:25,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:25,030 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-06-05 04:04:25,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-06-05 04:04:25,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:25,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:25,032 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:25,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 04:04:25,232 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:25,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:25,232 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-06-05 04:04:25,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:25,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665154177] [2021-06-05 04:04:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665154177] [2021-06-05 04:04:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665154177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340838240] [2021-06-05 04:04:25,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:25,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:25,381 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340838240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:25,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 04:04:25,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667772667] [2021-06-05 04:04:25,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:25,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:25,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:25,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:25,382 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:25,557 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-06-05 04:04:25,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:25,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:25,559 INFO L225 Difference]: With dead ends: 2171 [2021-06-05 04:04:25,559 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 04:04:25,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:04:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 04:04:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-06-05 04:04:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 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 04:04:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-06-05 04:04:25,578 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-06-05 04:04:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:25,578 INFO L482 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-06-05 04:04:25,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-06-05 04:04:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 04:04:25,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:25,580 INFO L521 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:25,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,780 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:25,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:25,780 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-06-05 04:04:25,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:25,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127472635] [2021-06-05 04:04:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:25,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127472635] [2021-06-05 04:04:25,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127472635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088278149] [2021-06-05 04:04:25,862 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:25,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:25,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:25,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088278149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:25,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:25,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 04:04:25,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965179015] [2021-06-05 04:04:25,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:25,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:25,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:25,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:25,946 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:26,212 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-06-05 04:04:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:04:26,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 04:04:26,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:26,215 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 04:04:26,215 INFO L226 Difference]: Without dead ends: 2447 [2021-06-05 04:04:26,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:04:26,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-05 04:04:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-06-05 04:04:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 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 04:04:26,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-06-05 04:04:26,234 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-06-05 04:04:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:26,235 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-06-05 04:04:26,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-06-05 04:04:26,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:26,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:26,236 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:26,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,437 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:26,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:26,437 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-06-05 04:04:26,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:26,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959615659] [2021-06-05 04:04:26,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:26,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:26,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:26,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959615659] [2021-06-05 04:04:26,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959615659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918500980] [2021-06-05 04:04:26,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:26,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:26,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:26,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:26,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918500980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:26,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 04:04:26,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176791215] [2021-06-05 04:04:26,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:26,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:26,546 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:26,665 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-06-05 04:04:26,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:26,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:26,667 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 04:04:26,667 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 04:04:26,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 98.5ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:26,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 04:04:26,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-06-05 04:04:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 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 04:04:26,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-06-05 04:04:26,685 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-06-05 04:04:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:26,685 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-06-05 04:04:26,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:26,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-06-05 04:04:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:26,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:26,687 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:26,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,887 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-06-05 04:04:26,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:26,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187328432] [2021-06-05 04:04:26,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:26,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:26,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187328432] [2021-06-05 04:04:26,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187328432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840757404] [2021-06-05 04:04:26,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:26,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:04:26,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:26,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:26,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:26,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840757404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:26,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:26,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:26,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803958659] [2021-06-05 04:04:26,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:26,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:26,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:26,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:26,990 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:27,051 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-06-05 04:04:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:27,053 INFO L225 Difference]: With dead ends: 2256 [2021-06-05 04:04:27,053 INFO L226 Difference]: Without dead ends: 2254 [2021-06-05 04:04:27,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-06-05 04:04:27,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-06-05 04:04:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 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 04:04:27,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-06-05 04:04:27,073 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-06-05 04:04:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,073 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-06-05 04:04:27,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-06-05 04:04:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:27,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,075 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:27,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable583 [2021-06-05 04:04:27,276 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-06-05 04:04:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:27,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814516891] [2021-06-05 04:04:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:27,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814516891] [2021-06-05 04:04:27,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814516891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779392443] [2021-06-05 04:04:27,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:27,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:27,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:27,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:27,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779392443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:27,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:27,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488707034] [2021-06-05 04:04:27,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:27,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:27,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:27,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:27,378 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:27,463 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-06-05 04:04:27,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:27,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:27,465 INFO L225 Difference]: With dead ends: 2285 [2021-06-05 04:04:27,465 INFO L226 Difference]: Without dead ends: 2284 [2021-06-05 04:04:27,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-06-05 04:04:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-06-05 04:04:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 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 04:04:27,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-06-05 04:04:27,485 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-06-05 04:04:27,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,485 INFO L482 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-06-05 04:04:27,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-06-05 04:04:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:27,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,495 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:27,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 04:04:27,697 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:27,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-06-05 04:04:27,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:27,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544923816] [2021-06-05 04:04:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:27,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:27,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544923816] [2021-06-05 04:04:27,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544923816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130960232] [2021-06-05 04:04:27,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:27,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:27,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:27,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:27,796 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:27,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130960232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:27,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:27,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:27,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601735882] [2021-06-05 04:04:27,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:27,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:27,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:27,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:27,797 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:27,926 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-06-05 04:04:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:27,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:27,928 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 04:04:27,928 INFO L226 Difference]: Without dead ends: 2220 [2021-06-05 04:04:27,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:27,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-06-05 04:04:27,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-06-05 04:04:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 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 04:04:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-06-05 04:04:27,948 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-06-05 04:04:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:27,948 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-06-05 04:04:27,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-06-05 04:04:27,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:27,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:27,950 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:28,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-05 04:04:28,150 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-06-05 04:04:28,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:28,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122205467] [2021-06-05 04:04:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122205467] [2021-06-05 04:04:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122205467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273143222] [2021-06-05 04:04:28,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:28,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:04:28,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:28,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:28,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:28,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273143222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:28,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:28,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769350585] [2021-06-05 04:04:28,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:28,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:28,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:28,258 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:28,393 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-06-05 04:04:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:28,395 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 04:04:28,395 INFO L226 Difference]: Without dead ends: 2216 [2021-06-05 04:04:28,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:28,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-06-05 04:04:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-06-05 04:04:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 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 04:04:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-06-05 04:04:28,415 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-06-05 04:04:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:28,415 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-06-05 04:04:28,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-06-05 04:04:28,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:28,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:28,417 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:28,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-05 04:04:28,618 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-06-05 04:04:28,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:28,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091605690] [2021-06-05 04:04:28,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:28,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091605690] [2021-06-05 04:04:28,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091605690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94069288] [2021-06-05 04:04:28,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:28,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:28,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:28,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94069288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:28,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:28,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 04:04:28,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044080491] [2021-06-05 04:04:28,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:28,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:28,726 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:28,837 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-06-05 04:04:28,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:28,837 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:28,839 INFO L225 Difference]: With dead ends: 2259 [2021-06-05 04:04:28,839 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 04:04:28,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 91.7ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:28,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 04:04:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-06-05 04:04:28,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 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 04:04:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-06-05 04:04:28,858 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-06-05 04:04:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:28,858 INFO L482 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-06-05 04:04:28,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:28,858 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-06-05 04:04:28,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:28,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:28,860 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:29,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-05 04:04:29,073 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-06-05 04:04:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:29,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551706578] [2021-06-05 04:04:29,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:29,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:29,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551706578] [2021-06-05 04:04:29,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551706578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132871534] [2021-06-05 04:04:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:04:29,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:29,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:29,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132871534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:29,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 04:04:29,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948840044] [2021-06-05 04:04:29,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:29,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:29,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:29,174 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,314 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-06-05 04:04:29,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:29,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:29,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,316 INFO L225 Difference]: With dead ends: 2223 [2021-06-05 04:04:29,316 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 04:04:29,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 04:04:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-06-05 04:04:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 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 04:04:29,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-06-05 04:04:29,334 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-06-05 04:04:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:29,334 INFO L482 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-06-05 04:04:29,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-06-05 04:04:29,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:29,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:29,336 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:29,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,537 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-06-05 04:04:29,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:29,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736449942] [2021-06-05 04:04:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:29,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736449942] [2021-06-05 04:04:29,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736449942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263398977] [2021-06-05 04:04:29,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:29,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263398977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:29,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:29,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514475487] [2021-06-05 04:04:29,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:29,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:29,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:29,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:29,636 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:29,690 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-06-05 04:04:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:29,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:29,692 INFO L225 Difference]: With dead ends: 2236 [2021-06-05 04:04:29,692 INFO L226 Difference]: Without dead ends: 2236 [2021-06-05 04:04:29,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-06-05 04:04:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-06-05 04:04:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 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 04:04:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-06-05 04:04:29,712 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-06-05 04:04:29,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:29,712 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-06-05 04:04:29,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:29,712 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-06-05 04:04:29,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:29,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:29,714 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:29,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-05 04:04:29,914 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:29,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-06-05 04:04:29,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:29,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200280448] [2021-06-05 04:04:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:29,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:29,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200280448] [2021-06-05 04:04:29,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200280448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:29,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619081508] [2021-06-05 04:04:29,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:29,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,003 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:30,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619081508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407766302] [2021-06-05 04:04:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:30,004 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:30,076 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-06-05 04:04:30,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:30,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:30,078 INFO L225 Difference]: With dead ends: 2263 [2021-06-05 04:04:30,078 INFO L226 Difference]: Without dead ends: 2262 [2021-06-05 04:04:30,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-06-05 04:04:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-06-05 04:04:30,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 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 04:04:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-06-05 04:04:30,098 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-06-05 04:04:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,098 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-06-05 04:04:30,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-06-05 04:04:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:30,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,100 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:30,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-05 04:04:30,302 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:30,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:30,302 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-06-05 04:04:30,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:30,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5972344] [2021-06-05 04:04:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:30,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5972344] [2021-06-05 04:04:30,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5972344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023694103] [2021-06-05 04:04:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:30,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:30,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023694103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-06-05 04:04:30,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990908156] [2021-06-05 04:04:30,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:30,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:30,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:30,394 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:30,497 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-06-05 04:04:30,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:30,498 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:30,500 INFO L225 Difference]: With dead ends: 2229 [2021-06-05 04:04:30,500 INFO L226 Difference]: Without dead ends: 2225 [2021-06-05 04:04:30,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:04:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-06-05 04:04:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-06-05 04:04:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 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 04:04:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-06-05 04:04:30,519 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-06-05 04:04:30,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,519 INFO L482 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-06-05 04:04:30,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-06-05 04:04:30,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:30,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,521 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:30,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,721 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-06-05 04:04:30,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:30,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686574445] [2021-06-05 04:04:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:30,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:30,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686574445] [2021-06-05 04:04:30,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686574445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686501932] [2021-06-05 04:04:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:30,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:30,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:30,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:30,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686501932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:30,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:30,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-05 04:04:30,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050599721] [2021-06-05 04:04:30,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:30,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:30,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:30,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:30,822 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:30,945 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-06-05 04:04:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:30,947 INFO L225 Difference]: With dead ends: 2217 [2021-06-05 04:04:30,947 INFO L226 Difference]: Without dead ends: 2211 [2021-06-05 04:04:30,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-06-05 04:04:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-06-05 04:04:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 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 04:04:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-06-05 04:04:30,967 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-06-05 04:04:30,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:30,967 INFO L482 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-06-05 04:04:30,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-06-05 04:04:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:30,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:30,969 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:31,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,169 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:31,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:31,169 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-06-05 04:04:31,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:31,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264285823] [2021-06-05 04:04:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:31,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:31,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:31,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264285823] [2021-06-05 04:04:31,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264285823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329574269] [2021-06-05 04:04:31,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:31,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329574269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:31,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:04:31,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422644248] [2021-06-05 04:04:31,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:31,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:31,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:31,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:31,282 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:31,412 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-06-05 04:04:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:31,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:31,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:31,414 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 04:04:31,414 INFO L226 Difference]: Without dead ends: 2207 [2021-06-05 04:04:31,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-05 04:04:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-06-05 04:04:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 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 04:04:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-06-05 04:04:31,433 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-06-05 04:04:31,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:31,433 INFO L482 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-06-05 04:04:31,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-06-05 04:04:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:31,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:31,435 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:31,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,636 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:31,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:31,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-06-05 04:04:31,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:31,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911824183] [2021-06-05 04:04:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:31,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:31,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911824183] [2021-06-05 04:04:31,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911824183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915831959] [2021-06-05 04:04:31,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:31,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:31,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915831959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:31,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:31,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:04:31,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393955921] [2021-06-05 04:04:31,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:31,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:31,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:31,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:31,756 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:31,895 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-06-05 04:04:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:31,896 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:31,897 INFO L225 Difference]: With dead ends: 2421 [2021-06-05 04:04:31,898 INFO L226 Difference]: Without dead ends: 2413 [2021-06-05 04:04:31,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-06-05 04:04:31,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-06-05 04:04:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 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 04:04:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-06-05 04:04:31,917 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-06-05 04:04:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:31,918 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-06-05 04:04:31,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-06-05 04:04:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:31,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:31,919 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:32,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:32,120 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:32,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:32,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-06-05 04:04:32,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:32,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011171510] [2021-06-05 04:04:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:32,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011171510] [2021-06-05 04:04:32,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011171510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629984234] [2021-06-05 04:04:32,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:32,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:32,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:32,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629984234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:32,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:04:32,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298955911] [2021-06-05 04:04:32,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:32,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:32,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:32,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:32,228 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:32,349 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-06-05 04:04:32,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:32,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:32,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:32,351 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 04:04:32,351 INFO L226 Difference]: Without dead ends: 2240 [2021-06-05 04:04:32,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:32,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-06-05 04:04:32,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-06-05 04:04:32,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 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 04:04:32,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-06-05 04:04:32,376 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-06-05 04:04:32,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:32,376 INFO L482 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-06-05 04:04:32,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-06-05 04:04:32,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:32,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:32,377 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:32,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-05 04:04:32,578 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:32,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:32,578 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-06-05 04:04:32,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:32,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585265415] [2021-06-05 04:04:32,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:32,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:32,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585265415] [2021-06-05 04:04:32,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585265415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564675581] [2021-06-05 04:04:32,615 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:32,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:32,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:32,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:32,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:32,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:32,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564675581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:32,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-05 04:04:32,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303387407] [2021-06-05 04:04:32,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:04:32,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:32,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:04:32,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:04:32,670 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:32,714 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-06-05 04:04:32,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:32,715 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:32,717 INFO L225 Difference]: With dead ends: 2261 [2021-06-05 04:04:32,717 INFO L226 Difference]: Without dead ends: 2259 [2021-06-05 04:04:32,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:32,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-06-05 04:04:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-06-05 04:04:32,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 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 04:04:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-06-05 04:04:32,737 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-06-05 04:04:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:32,737 INFO L482 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-06-05 04:04:32,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-06-05 04:04:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:32,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:32,739 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:32,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable596,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:32,939 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-06-05 04:04:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:32,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747910302] [2021-06-05 04:04:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:32,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747910302] [2021-06-05 04:04:32,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747910302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:32,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189255162] [2021-06-05 04:04:32,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:04:33,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:33,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:33,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189255162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432063611] [2021-06-05 04:04:33,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:33,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:33,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:33,044 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,094 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-06-05 04:04:33,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:04:33,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:33,096 INFO L225 Difference]: With dead ends: 2242 [2021-06-05 04:04:33,096 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 04:04:33,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 04:04:33,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-06-05 04:04:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 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 04:04:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-06-05 04:04:33,116 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-06-05 04:04:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:33,116 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-06-05 04:04:33,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-06-05 04:04:33,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:33,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:33,118 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 04:04:33,318 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-06-05 04:04:33,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192356995] [2021-06-05 04:04:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:33,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192356995] [2021-06-05 04:04:33,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192356995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430107314] [2021-06-05 04:04:33,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:33,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:33,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430107314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:33,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678054923] [2021-06-05 04:04:33,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:33,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:33,413 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,511 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-06-05 04:04:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:33,513 INFO L225 Difference]: With dead ends: 2234 [2021-06-05 04:04:33,514 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 04:04:33,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:33,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 04:04:33,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-06-05 04:04:33,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 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 04:04:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-06-05 04:04:33,539 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-06-05 04:04:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:33,540 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-06-05 04:04:33,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-06-05 04:04:33,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:33,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:33,541 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:33,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 04:04:33,742 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:33,742 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-06-05 04:04:33,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:33,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529908178] [2021-06-05 04:04:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:33,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:33,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529908178] [2021-06-05 04:04:33,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529908178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490632931] [2021-06-05 04:04:33,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:33,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490632931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:33,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:33,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 04:04:33,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046090026] [2021-06-05 04:04:33,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:33,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:33,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:33,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:33,839 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:33,950 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-06-05 04:04:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:33,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:33,952 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 04:04:33,952 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 04:04:33,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:33,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 04:04:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-06-05 04:04:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 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 04:04:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-06-05 04:04:33,972 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-06-05 04:04:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:33,972 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-06-05 04:04:33,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-06-05 04:04:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:33,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:33,974 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:34,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-05 04:04:34,174 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-06-05 04:04:34,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:34,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477305555] [2021-06-05 04:04:34,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:34,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477305555] [2021-06-05 04:04:34,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477305555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552385101] [2021-06-05 04:04:34,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:34,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:34,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:34,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:34,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552385101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:34,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-06-05 04:04:34,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350924608] [2021-06-05 04:04:34,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:34,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:34,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:34,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:34,276 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:34,383 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-06-05 04:04:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:34,385 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 04:04:34,385 INFO L226 Difference]: Without dead ends: 2685 [2021-06-05 04:04:34,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:34,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-06-05 04:04:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-06-05 04:04:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 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 04:04:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-06-05 04:04:34,405 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-06-05 04:04:34,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:34,405 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-06-05 04:04:34,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-06-05 04:04:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:34,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:34,406 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:34,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:34,607 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-06-05 04:04:34,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:34,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521120425] [2021-06-05 04:04:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:34,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521120425] [2021-06-05 04:04:34,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521120425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903145123] [2021-06-05 04:04:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:34,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:34,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:34,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903145123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:34,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:34,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:04:34,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351750149] [2021-06-05 04:04:34,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:34,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:34,727 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:34,852 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-06-05 04:04:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:34,855 INFO L225 Difference]: With dead ends: 2703 [2021-06-05 04:04:34,855 INFO L226 Difference]: Without dead ends: 2695 [2021-06-05 04:04:34,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:34,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-06-05 04:04:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-06-05 04:04:34,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 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 04:04:34,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-06-05 04:04:34,876 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-06-05 04:04:34,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:34,876 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-06-05 04:04:34,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-06-05 04:04:34,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:34,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:34,878 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:35,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 04:04:35,078 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:35,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:35,078 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-06-05 04:04:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:35,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416610059] [2021-06-05 04:04:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:35,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:35,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416610059] [2021-06-05 04:04:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416610059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146530747] [2021-06-05 04:04:35,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:35,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:35,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:35,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146530747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:35,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 04:04:35,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898229834] [2021-06-05 04:04:35,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:35,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:35,198 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:35,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:35,335 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-06-05 04:04:35,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:35,336 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:35,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,338 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 04:04:35,338 INFO L226 Difference]: Without dead ends: 2442 [2021-06-05 04:04:35,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-06-05 04:04:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-06-05 04:04:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 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 04:04:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-06-05 04:04:35,357 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-06-05 04:04:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:35,357 INFO L482 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-06-05 04:04:35,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-06-05 04:04:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:35,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:35,359 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:35,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:35,559 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:35,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:35,560 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-06-05 04:04:35,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:35,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000506745] [2021-06-05 04:04:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:35,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000506745] [2021-06-05 04:04:35,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000506745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052044748] [2021-06-05 04:04:35,612 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:35,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:35,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:35,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:35,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052044748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:35,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:35,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-06-05 04:04:35,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304262142] [2021-06-05 04:04:35,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:35,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:35,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:35,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:35,684 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:04:35,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:35,789 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-06-05 04:04:35,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:04:35,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:35,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:35,791 INFO L225 Difference]: With dead ends: 2203 [2021-06-05 04:04:35,791 INFO L226 Difference]: Without dead ends: 2199 [2021-06-05 04:04:35,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:35,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-06-05 04:04:35,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-06-05 04:04:35,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 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 04:04:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-06-05 04:04:35,810 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-06-05 04:04:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:35,810 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-06-05 04:04:35,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:04:35,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-06-05 04:04:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:35,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:35,812 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:36,012 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-06-05 04:04:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483762538] [2021-06-05 04:04:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:36,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:36,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483762538] [2021-06-05 04:04:36,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483762538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:36,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097665612] [2021-06-05 04:04:36,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:36,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:36,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:36,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:36,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097665612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:36,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:36,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:04:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233463492] [2021-06-05 04:04:36,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:36,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:36,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:36,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:36,127 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:36,237 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-06-05 04:04:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:36,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:36,240 INFO L225 Difference]: With dead ends: 2240 [2021-06-05 04:04:36,240 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 04:04:36,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 04:04:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-06-05 04:04:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 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 04:04:36,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-06-05 04:04:36,261 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-06-05 04:04:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:36,261 INFO L482 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-06-05 04:04:36,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-06-05 04:04:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:36,263 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:36,263 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:36,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 04:04:36,469 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-06-05 04:04:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:36,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695356480] [2021-06-05 04:04:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:36,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:36,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:36,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695356480] [2021-06-05 04:04:36,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695356480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:36,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55990102] [2021-06-05 04:04:36,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:36,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:36,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:36,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55990102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:36,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:36,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 04:04:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686298481] [2021-06-05 04:04:36,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:36,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:36,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:36,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:36,573 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:36,707 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-06-05 04:04:36,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:36,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:36,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:36,709 INFO L225 Difference]: With dead ends: 2239 [2021-06-05 04:04:36,709 INFO L226 Difference]: Without dead ends: 2231 [2021-06-05 04:04:36,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:36,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-06-05 04:04:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-06-05 04:04:36,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 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 04:04:36,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-06-05 04:04:36,729 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-06-05 04:04:36,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:36,729 INFO L482 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-06-05 04:04:36,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:36,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-06-05 04:04:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:36,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:36,731 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:36,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:36,945 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:36,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:36,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-06-05 04:04:36,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:36,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914663215] [2021-06-05 04:04:36,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:36,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:37,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:37,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:37,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914663215] [2021-06-05 04:04:37,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914663215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265024849] [2021-06-05 04:04:37,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:37,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:37,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:37,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:37,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265024849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:37,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 04:04:37,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362982963] [2021-06-05 04:04:37,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:37,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:37,070 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:37,206 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-06-05 04:04:37,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:37,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:37,208 INFO L225 Difference]: With dead ends: 2477 [2021-06-05 04:04:37,208 INFO L226 Difference]: Without dead ends: 2467 [2021-06-05 04:04:37,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-06-05 04:04:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-06-05 04:04:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 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 04:04:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-06-05 04:04:37,227 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-06-05 04:04:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:37,227 INFO L482 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-06-05 04:04:37,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-06-05 04:04:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:37,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:37,229 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:37,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,429 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-06-05 04:04:37,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:37,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498544158] [2021-06-05 04:04:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:37,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:37,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:37,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498544158] [2021-06-05 04:04:37,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498544158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905569896] [2021-06-05 04:04:37,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:37,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905569896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:37,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:37,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132248524] [2021-06-05 04:04:37,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:37,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:37,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:37,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:37,529 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:37,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:37,600 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-06-05 04:04:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:04:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:37,602 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 04:04:37,602 INFO L226 Difference]: Without dead ends: 2228 [2021-06-05 04:04:37,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-06-05 04:04:37,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-06-05 04:04:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 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 04:04:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-06-05 04:04:37,621 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-06-05 04:04:37,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:37,621 INFO L482 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-06-05 04:04:37,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-06-05 04:04:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:37,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:37,623 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:37,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,824 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-06-05 04:04:37,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:37,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740767840] [2021-06-05 04:04:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:37,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740767840] [2021-06-05 04:04:37,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740767840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052116711] [2021-06-05 04:04:37,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:37,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:37,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:37,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:37,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:37,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:37,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052116711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:37,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:37,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:04:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395720713] [2021-06-05 04:04:37,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:37,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:37,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:37,941 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:38,080 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-06-05 04:04:38,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:38,083 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 04:04:38,083 INFO L226 Difference]: Without dead ends: 2218 [2021-06-05 04:04:38,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:04:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-06-05 04:04:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-06-05 04:04:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 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 04:04:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-06-05 04:04:38,102 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-06-05 04:04:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:38,102 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-06-05 04:04:38,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-06-05 04:04:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:38,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:38,104 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:38,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:38,304 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:38,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-06-05 04:04:38,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:38,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509502380] [2021-06-05 04:04:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:38,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:38,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509502380] [2021-06-05 04:04:38,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509502380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:38,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727927253] [2021-06-05 04:04:38,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:38,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:38,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:38,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727927253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:38,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:38,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-06-05 04:04:38,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929316305] [2021-06-05 04:04:38,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:38,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:38,407 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:38,462 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-06-05 04:04:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:04:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:38,464 INFO L225 Difference]: With dead ends: 2251 [2021-06-05 04:04:38,464 INFO L226 Difference]: Without dead ends: 2251 [2021-06-05 04:04:38,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:38,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-06-05 04:04:38,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-06-05 04:04:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 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 04:04:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-06-05 04:04:38,483 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-06-05 04:04:38,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:38,484 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-06-05 04:04:38,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-06-05 04:04:38,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:38,485 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:38,485 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:38,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:38,686 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:38,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:38,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-06-05 04:04:38,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:38,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573544761] [2021-06-05 04:04:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:38,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573544761] [2021-06-05 04:04:38,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573544761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:38,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186373212] [2021-06-05 04:04:38,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:38,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:04:38,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:38,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:38,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:38,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186373212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:38,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:38,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:04:38,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668887259] [2021-06-05 04:04:38,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:04:38,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:38,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:04:38,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:04:38,788 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:38,882 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-06-05 04:04:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:04:38,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:38,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:38,884 INFO L225 Difference]: With dead ends: 2206 [2021-06-05 04:04:38,884 INFO L226 Difference]: Without dead ends: 2204 [2021-06-05 04:04:38,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-06-05 04:04:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-06-05 04:04:38,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 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 04:04:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-06-05 04:04:38,903 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-06-05 04:04:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:38,903 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-06-05 04:04:38,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:38,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-06-05 04:04:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:38,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:38,905 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:39,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,105 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:39,106 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-06-05 04:04:39,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:39,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002308535] [2021-06-05 04:04:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:39,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002308535] [2021-06-05 04:04:39,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002308535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741441193] [2021-06-05 04:04:39,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:39,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:39,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:39,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741441193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:39,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-06-05 04:04:39,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467067640] [2021-06-05 04:04:39,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:04:39,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:39,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:04:39,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:04:39,210 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:39,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:39,320 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-06-05 04:04:39,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:04:39,320 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:39,322 INFO L225 Difference]: With dead ends: 2212 [2021-06-05 04:04:39,322 INFO L226 Difference]: Without dead ends: 2208 [2021-06-05 04:04:39,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:04:39,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-06-05 04:04:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-06-05 04:04:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 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 04:04:39,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-06-05 04:04:39,341 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-06-05 04:04:39,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:39,341 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-06-05 04:04:39,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-06-05 04:04:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:39,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:39,343 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:39,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 04:04:39,544 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-06-05 04:04:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:39,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474615779] [2021-06-05 04:04:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:39,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:39,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474615779] [2021-06-05 04:04:39,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474615779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135735644] [2021-06-05 04:04:39,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:39,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:39,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:39,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:39,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:39,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135735644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:39,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:39,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:04:39,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911850382] [2021-06-05 04:04:39,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:39,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:39,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:39,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:39,658 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:39,778 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-06-05 04:04:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:39,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:39,780 INFO L225 Difference]: With dead ends: 2220 [2021-06-05 04:04:39,780 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 04:04:39,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:39,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 04:04:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-06-05 04:04:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 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 04:04:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-06-05 04:04:39,799 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-06-05 04:04:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:39,799 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-06-05 04:04:39,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-06-05 04:04:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:39,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:39,801 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:40,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,001 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-06-05 04:04:40,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:40,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492930395] [2021-06-05 04:04:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:40,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:40,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492930395] [2021-06-05 04:04:40,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492930395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845836725] [2021-06-05 04:04:40,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:40,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:40,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:40,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845836725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:40,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:04:40,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778093427] [2021-06-05 04:04:40,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:04:40,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:40,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:04:40,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:04:40,109 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:40,237 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-06-05 04:04:40,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:40,238 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:40,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:40,240 INFO L225 Difference]: With dead ends: 2831 [2021-06-05 04:04:40,240 INFO L226 Difference]: Without dead ends: 2823 [2021-06-05 04:04:40,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-06-05 04:04:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-06-05 04:04:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 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 04:04:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-06-05 04:04:40,261 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-06-05 04:04:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:40,261 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-06-05 04:04:40,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-06-05 04:04:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:40,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:40,262 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:40,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 04:04:40,463 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:40,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-06-05 04:04:40,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:40,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447464811] [2021-06-05 04:04:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:40,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:40,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:40,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447464811] [2021-06-05 04:04:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447464811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231160949] [2021-06-05 04:04:40,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:40,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:40,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:40,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231160949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:40,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:40,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:04:40,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027706977] [2021-06-05 04:04:40,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:40,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:40,584 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:40,734 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-06-05 04:04:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:40,736 INFO L225 Difference]: With dead ends: 2850 [2021-06-05 04:04:40,736 INFO L226 Difference]: Without dead ends: 2840 [2021-06-05 04:04:40,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:40,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-06-05 04:04:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-06-05 04:04:40,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 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 04:04:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-06-05 04:04:40,757 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-06-05 04:04:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:40,757 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-06-05 04:04:40,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-06-05 04:04:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:40,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:40,759 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:40,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:40,959 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:40,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:40,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-06-05 04:04:40,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:40,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799673856] [2021-06-05 04:04:40,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:41,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799673856] [2021-06-05 04:04:41,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799673856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857767060] [2021-06-05 04:04:41,022 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:41,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:41,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:41,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:41,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:41,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857767060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:41,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:04:41,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645195959] [2021-06-05 04:04:41,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:41,079 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:41,254 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-06-05 04:04:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:41,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:41,257 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 04:04:41,257 INFO L226 Difference]: Without dead ends: 2612 [2021-06-05 04:04:41,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-06-05 04:04:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-06-05 04:04:41,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 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 04:04:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-06-05 04:04:41,277 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-06-05 04:04:41,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:41,277 INFO L482 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-06-05 04:04:41,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:41,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-06-05 04:04:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:41,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:41,279 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:41,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:41,479 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-06-05 04:04:41,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:41,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907813812] [2021-06-05 04:04:41,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:41,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:41,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907813812] [2021-06-05 04:04:41,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907813812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136661716] [2021-06-05 04:04:41,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:41,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:41,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:41,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136661716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:41,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:04:41,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750058541] [2021-06-05 04:04:41,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:41,600 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:41,711 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-06-05 04:04:41,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:41,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:41,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:41,713 INFO L225 Difference]: With dead ends: 2268 [2021-06-05 04:04:41,713 INFO L226 Difference]: Without dead ends: 2264 [2021-06-05 04:04:41,713 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-06-05 04:04:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-06-05 04:04:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.8134292565947243) internal successors, (5866), 2085 states have internal predecessors, (5866), 0 states have call successors, (0), 0 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 04:04:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-06-05 04:04:41,742 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-06-05 04:04:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:41,742 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-06-05 04:04:41,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:41,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-06-05 04:04:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:41,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:41,743 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:41,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 04:04:41,944 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:41,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-06-05 04:04:41,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:41,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40890968] [2021-06-05 04:04:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:41,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40890968] [2021-06-05 04:04:41,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40890968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:41,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118088849] [2021-06-05 04:04:41,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:42,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118088849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:42,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:42,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-06-05 04:04:42,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346141567] [2021-06-05 04:04:42,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:42,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:42,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:42,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:42,061 INFO L87 Difference]: Start difference. First operand 2086 states and 5866 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:04:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:42,198 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-06-05 04:04:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:04:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:42,201 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 04:04:42,201 INFO L226 Difference]: Without dead ends: 2340 [2021-06-05 04:04:42,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:42,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-06-05 04:04:42,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-06-05 04:04:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.809592326139089) internal successors, (5858), 2085 states have internal predecessors, (5858), 0 states have call successors, (0), 0 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 04:04:42,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-06-05 04:04:42,221 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-06-05 04:04:42,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:42,221 INFO L482 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-06-05 04:04:42,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:04:42,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-06-05 04:04:42,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:42,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:42,223 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:42,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:42,423 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:42,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:42,423 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-06-05 04:04:42,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:42,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433669760] [2021-06-05 04:04:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:42,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433669760] [2021-06-05 04:04:42,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433669760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:42,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606444655] [2021-06-05 04:04:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:42,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:42,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606444655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:42,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:42,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-06-05 04:04:42,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480373752] [2021-06-05 04:04:42,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:42,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:42,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:42,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:42,546 INFO L87 Difference]: Start difference. First operand 2086 states and 5858 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:42,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:42,678 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-06-05 04:04:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:42,678 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:42,680 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 04:04:42,680 INFO L226 Difference]: Without dead ends: 2356 [2021-06-05 04:04:42,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-06-05 04:04:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-06-05 04:04:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.8075273939971415) internal successors, (5893), 2099 states have internal predecessors, (5893), 0 states have call successors, (0), 0 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 04:04:42,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-06-05 04:04:42,700 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-06-05 04:04:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:42,700 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-06-05 04:04:42,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-06-05 04:04:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:42,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:42,702 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:42,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:42,917 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:42,918 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-06-05 04:04:42,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:42,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012599785] [2021-06-05 04:04:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:42,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012599785] [2021-06-05 04:04:42,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012599785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:42,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526292041] [2021-06-05 04:04:42,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:43,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:43,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:43,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:43,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:43,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526292041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:43,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:43,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 04:04:43,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396660506] [2021-06-05 04:04:43,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:43,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:43,055 INFO L87 Difference]: Start difference. First operand 2100 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:43,221 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-06-05 04:04:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:43,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:43,224 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 04:04:43,224 INFO L226 Difference]: Without dead ends: 2605 [2021-06-05 04:04:43,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-06-05 04:04:43,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-06-05 04:04:43,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.806574559313959) internal successors, (5891), 2099 states have internal predecessors, (5891), 0 states have call successors, (0), 0 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 04:04:43,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-06-05 04:04:43,245 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-06-05 04:04:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:43,245 INFO L482 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-06-05 04:04:43,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,245 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-06-05 04:04:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:43,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:43,246 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:43,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:43,447 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-06-05 04:04:43,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:43,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69419655] [2021-06-05 04:04:43,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:43,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:43,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69419655] [2021-06-05 04:04:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69419655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:43,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400367256] [2021-06-05 04:04:43,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:43,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:43,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:43,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:43,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:43,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400367256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:43,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:43,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-06-05 04:04:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189760699] [2021-06-05 04:04:43,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:43,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:43,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:43,569 INFO L87 Difference]: Start difference. First operand 2100 states and 5891 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:43,653 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-06-05 04:04:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:43,653 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:43,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:43,655 INFO L225 Difference]: With dead ends: 2417 [2021-06-05 04:04:43,655 INFO L226 Difference]: Without dead ends: 2417 [2021-06-05 04:04:43,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-05 04:04:43,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-06-05 04:04:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.827109266943292) internal successors, (6132), 2169 states have internal predecessors, (6132), 0 states have call successors, (0), 0 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 04:04:43,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-06-05 04:04:43,676 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-06-05 04:04:43,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:43,676 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-06-05 04:04:43,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-06-05 04:04:43,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:43,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:43,678 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:43,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-06-05 04:04:43,879 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-06-05 04:04:43,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:43,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952820930] [2021-06-05 04:04:43,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952820930] [2021-06-05 04:04:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952820930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859229141] [2021-06-05 04:04:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:43,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:04:43,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:43,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:43,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:44,014 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859229141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:44,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-05 04:04:44,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326786587] [2021-06-05 04:04:44,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:44,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:44,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:44,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:44,015 INFO L87 Difference]: Start difference. First operand 2170 states and 6132 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:44,173 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-06-05 04:04:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:44,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:44,176 INFO L225 Difference]: With dead ends: 2716 [2021-06-05 04:04:44,177 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 04:04:44,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:04:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 04:04:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-06-05 04:04:44,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.8261871830336562) internal successors, (6130), 2169 states have internal predecessors, (6130), 0 states have call successors, (0), 0 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 04:04:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-06-05 04:04:44,198 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-06-05 04:04:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:44,198 INFO L482 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-06-05 04:04:44,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-06-05 04:04:44,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:44,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:44,200 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:44,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-06-05 04:04:44,401 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-06-05 04:04:44,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:44,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960500863] [2021-06-05 04:04:44,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:44,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960500863] [2021-06-05 04:04:44,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960500863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045252314] [2021-06-05 04:04:44,462 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:04:44,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:44,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:44,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:44,539 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045252314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:44,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-06-05 04:04:44,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298306210] [2021-06-05 04:04:44,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:44,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:44,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:44,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:44,540 INFO L87 Difference]: Start difference. First operand 2170 states and 6130 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:04:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:44,610 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-06-05 04:04:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:04:44,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:44,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:44,613 INFO L225 Difference]: With dead ends: 2664 [2021-06-05 04:04:44,613 INFO L226 Difference]: Without dead ends: 2664 [2021-06-05 04:04:44,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-06-05 04:04:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-06-05 04:04:44,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8618090452261304) internal successors, (6834), 2388 states have internal predecessors, (6834), 0 states have call successors, (0), 0 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 04:04:44,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-06-05 04:04:44,638 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-06-05 04:04:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:44,638 INFO L482 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-06-05 04:04:44,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 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 04:04:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-06-05 04:04:44,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:44,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:44,640 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:44,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,856 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-06-05 04:04:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:44,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221624443] [2021-06-05 04:04:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:44,917 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:44,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:44,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221624443] [2021-06-05 04:04:44,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221624443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60334012] [2021-06-05 04:04:44,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:44,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:44,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60334012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:44,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:44,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-06-05 04:04:44,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204219466] [2021-06-05 04:04:44,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:44,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:44,980 INFO L87 Difference]: Start difference. First operand 2389 states and 6834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:45,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:45,045 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-06-05 04:04:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:04:45,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:45,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:45,049 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 04:04:45,049 INFO L226 Difference]: Without dead ends: 2613 [2021-06-05 04:04:45,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-06-05 04:04:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-06-05 04:04:45,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.860913280268119) internal successors, (6829), 2387 states have internal predecessors, (6829), 0 states have call successors, (0), 0 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 04:04:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-06-05 04:04:45,071 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-06-05 04:04:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:45,071 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-06-05 04:04:45,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:45,071 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-06-05 04:04:45,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:45,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:45,073 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:45,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-05 04:04:45,274 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:45,274 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-06-05 04:04:45,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:45,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242970135] [2021-06-05 04:04:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:45,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242970135] [2021-06-05 04:04:45,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242970135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:45,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742355187] [2021-06-05 04:04:45,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:45,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:45,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:45,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:45,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742355187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:45,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:45,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-06-05 04:04:45,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324976400] [2021-06-05 04:04:45,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:04:45,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:45,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:04:45,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:04:45,405 INFO L87 Difference]: Start difference. First operand 2388 states and 6829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:45,517 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-06-05 04:04:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:45,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:45,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:45,520 INFO L225 Difference]: With dead ends: 2617 [2021-06-05 04:04:45,520 INFO L226 Difference]: Without dead ends: 2615 [2021-06-05 04:04:45,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:04:45,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-06-05 04:04:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-06-05 04:04:45,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.8600754084625053) internal successors, (6827), 2387 states have internal predecessors, (6827), 0 states have call successors, (0), 0 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 04:04:45,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-06-05 04:04:45,543 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-06-05 04:04:45,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:45,543 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-06-05 04:04:45,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:45,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-06-05 04:04:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:45,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:45,545 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:45,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 04:04:45,745 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:45,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:45,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-06-05 04:04:45,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:45,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195679007] [2021-06-05 04:04:45,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:45,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:45,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195679007] [2021-06-05 04:04:45,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195679007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:45,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125282545] [2021-06-05 04:04:45,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:45,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:04:45,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:45,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:45,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125282545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:45,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:45,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-06-05 04:04:45,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446923879] [2021-06-05 04:04:45,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:45,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:45,874 INFO L87 Difference]: Start difference. First operand 2388 states and 6827 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:45,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:45,998 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-06-05 04:04:45,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:46,001 INFO L225 Difference]: With dead ends: 2623 [2021-06-05 04:04:46,001 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 04:04:46,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 04:04:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-06-05 04:04:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8613199665831246) internal successors, (6850), 2394 states have internal predecessors, (6850), 0 states have call successors, (0), 0 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 04:04:46,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-06-05 04:04:46,024 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-06-05 04:04:46,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:46,024 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-06-05 04:04:46,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-06-05 04:04:46,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:46,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:46,026 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:46,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-06-05 04:04:46,238 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:46,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:46,238 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-06-05 04:04:46,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:46,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665614357] [2021-06-05 04:04:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:46,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665614357] [2021-06-05 04:04:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665614357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862529622] [2021-06-05 04:04:46,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:46,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:46,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:04:46,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862529622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:46,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:46,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-06-05 04:04:46,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697273779] [2021-06-05 04:04:46,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:04:46,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:46,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:04:46,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:04:46,365 INFO L87 Difference]: Start difference. First operand 2395 states and 6850 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:46,514 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-06-05 04:04:46,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:46,518 INFO L225 Difference]: With dead ends: 3316 [2021-06-05 04:04:46,518 INFO L226 Difference]: Without dead ends: 3310 [2021-06-05 04:04:46,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:04:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-06-05 04:04:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-06-05 04:04:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8592314118629907) internal successors, (6845), 2394 states have internal predecessors, (6845), 0 states have call successors, (0), 0 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 04:04:46,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-06-05 04:04:46,544 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-06-05 04:04:46,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:46,544 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-06-05 04:04:46,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:46,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-06-05 04:04:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:46,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:46,546 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:46,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:46,762 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-06-05 04:04:46,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:46,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757302001] [2021-06-05 04:04:46,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:46,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757302001] [2021-06-05 04:04:46,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757302001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:46,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395080412] [2021-06-05 04:04:46,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:46,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:04:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:46,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:46,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395080412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:46,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:46,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 04:04:46,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058388330] [2021-06-05 04:04:46,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:46,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:46,906 INFO L87 Difference]: Start difference. First operand 2395 states and 6845 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:47,040 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-06-05 04:04:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:47,043 INFO L225 Difference]: With dead ends: 3332 [2021-06-05 04:04:47,043 INFO L226 Difference]: Without dead ends: 3324 [2021-06-05 04:04:47,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-06-05 04:04:47,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-06-05 04:04:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.85850622406639) internal successors, (6889), 2410 states have internal predecessors, (6889), 0 states have call successors, (0), 0 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 04:04:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-06-05 04:04:47,068 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-06-05 04:04:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:47,068 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-06-05 04:04:47,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,068 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-06-05 04:04:47,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:47,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:47,070 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:47,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:47,270 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-06-05 04:04:47,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:47,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820567192] [2021-06-05 04:04:47,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:47,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:47,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820567192] [2021-06-05 04:04:47,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820567192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072041993] [2021-06-05 04:04:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:47,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:04:47,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:47,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:04:47,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:47,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072041993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:47,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-06-05 04:04:47,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453263181] [2021-06-05 04:04:47,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:04:47,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:47,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:04:47,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:04:47,411 INFO L87 Difference]: Start difference. First operand 2411 states and 6889 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:47,566 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-06-05 04:04:47,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:47,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:47,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:47,569 INFO L225 Difference]: With dead ends: 3194 [2021-06-05 04:04:47,569 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 04:04:47,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:04:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 04:04:47,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-06-05 04:04:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.857676348547718) internal successors, (6887), 2410 states have internal predecessors, (6887), 0 states have call successors, (0), 0 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 04:04:47,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-06-05 04:04:47,595 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-06-05 04:04:47,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:47,595 INFO L482 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-06-05 04:04:47,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-06-05 04:04:47,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:47,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:47,597 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:47,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable628 [2021-06-05 04:04:47,797 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:47,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:47,797 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-06-05 04:04:47,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:47,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488292386] [2021-06-05 04:04:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:47,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:47,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488292386] [2021-06-05 04:04:47,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488292386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915440812] [2021-06-05 04:04:47,866 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:47,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:47,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915440812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:47,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:47,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-06-05 04:04:47,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782948660] [2021-06-05 04:04:47,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:04:47,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:04:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:04:47,951 INFO L87 Difference]: Start difference. First operand 2411 states and 6887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:48,110 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-06-05 04:04:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:04:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:48,113 INFO L225 Difference]: With dead ends: 3215 [2021-06-05 04:04:48,113 INFO L226 Difference]: Without dead ends: 3203 [2021-06-05 04:04:48,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 153.1ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:04:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-06-05 04:04:48,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-06-05 04:04:48,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.857201986754967) internal successors, (6903), 2416 states have internal predecessors, (6903), 0 states have call successors, (0), 0 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 04:04:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-06-05 04:04:48,139 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-06-05 04:04:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:48,139 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-06-05 04:04:48,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-06-05 04:04:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 04:04:48,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:48,141 INFO L521 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:48,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:48,358 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:48,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:48,358 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-06-05 04:04:48,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:48,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944756545] [2021-06-05 04:04:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:48,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:48,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944756545] [2021-06-05 04:04:48,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944756545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:48,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727918527] [2021-06-05 04:04:48,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:48,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:04:48,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:48,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 04:04:48,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:48,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727918527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:48,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:48,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-06-05 04:04:48,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857116347] [2021-06-05 04:04:48,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:04:48,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:48,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:04:48,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:04:48,524 INFO L87 Difference]: Start difference. First operand 2417 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:48,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:48,669 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-06-05 04:04:48,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:04:48,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 04:04:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:48,671 INFO L225 Difference]: With dead ends: 2609 [2021-06-05 04:04:48,671 INFO L226 Difference]: Without dead ends: 2602 [2021-06-05 04:04:48,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:04:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-06-05 04:04:48,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-06-05 04:04:48,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8567880794701987) internal successors, (6902), 2416 states have internal predecessors, (6902), 0 states have call successors, (0), 0 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 04:04:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-06-05 04:04:48,693 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-06-05 04:04:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:48,693 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-06-05 04:04:48,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:04:48,694 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-06-05 04:04:48,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:04:48,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:48,695 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:48,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 04:04:48,901 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:48,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:48,901 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-06-05 04:04:48,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:48,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790338076] [2021-06-05 04:04:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:48,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790338076] [2021-06-05 04:04:48,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790338076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:48,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875484419] [2021-06-05 04:04:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:48,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:04:48,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:48,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:04:48,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:49,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:49,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:04:50,176 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 04:04:50,344 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 373 [2021-06-05 04:04:50,535 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 384 [2021-06-05 04:04:50,847 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 477 [2021-06-05 04:04:51,550 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 232 [2021-06-05 04:04:51,738 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 357 [2021-06-05 04:04:51,946 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 261 [2021-06-05 04:04:52,987 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 495 DAG size of output: 289 [2021-06-05 04:04:53,122 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 290 [2021-06-05 04:04:53,331 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 647 DAG size of output: 412 [2021-06-05 04:04:53,666 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 552 [2021-06-05 04:04:54,228 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 04:04:54,783 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 709 [2021-06-05 04:04:55,391 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 1142 DAG size of output: 714 [2021-06-05 04:04:56,228 WARN L205 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 705 [2021-06-05 04:04:56,549 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 413 DAG size of output: 442 [2021-06-05 04:04:57,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-06-05 04:04:57,439 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 480 DAG size of output: 220 [2021-06-05 04:04:57,559 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 224 [2021-06-05 04:04:57,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:04:57,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:57,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:04:57,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:04:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:04:57,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875484419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:57,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:04:57,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:04:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525739205] [2021-06-05 04:04:57,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:04:57,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:04:57,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:04:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:57,788 INFO L87 Difference]: Start difference. First operand 2417 states and 6902 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:04:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:04:58,008 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-06-05 04:04:58,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:04:58,008 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:04:58,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:04:58,011 INFO L225 Difference]: With dead ends: 2595 [2021-06-05 04:04:58,011 INFO L226 Difference]: Without dead ends: 2592 [2021-06-05 04:04:58,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:04:58,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-06-05 04:04:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-06-05 04:04:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8589228295819935) internal successors, (7113), 2488 states have internal predecessors, (7113), 0 states have call successors, (0), 0 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 04:04:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-06-05 04:04:58,034 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-06-05 04:04:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:04:58,034 INFO L482 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-06-05 04:04:58,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:04:58,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-06-05 04:04:58,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:04:58,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:04:58,037 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:04:58,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-05 04:04:58,237 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:04:58,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:04:58,237 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-06-05 04:04:58,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:04:58,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684908500] [2021-06-05 04:04:58,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:04:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:04:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:04:58,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:04:58,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684908500] [2021-06-05 04:04:58,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684908500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:04:58,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244146646] [2021-06-05 04:04:58,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:04:58,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:04:58,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:04:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:04:58,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:04:58,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:04:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:00,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:00,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:00,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:00,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:00,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244146646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:00,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:00,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:00,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232980094] [2021-06-05 04:05:00,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:00,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:00,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:00,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:00,098 INFO L87 Difference]: Start difference. First operand 2489 states and 7113 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:00,286 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-06-05 04:05:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:00,286 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:00,288 INFO L225 Difference]: With dead ends: 2702 [2021-06-05 04:05:00,289 INFO L226 Difference]: Without dead ends: 2699 [2021-06-05 04:05:00,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:00,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-06-05 04:05:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-06-05 04:05:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 2.8696505692972125) internal successors, (7309), 2547 states have internal predecessors, (7309), 0 states have call successors, (0), 0 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 04:05:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-06-05 04:05:00,313 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-06-05 04:05:00,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:00,313 INFO L482 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-06-05 04:05:00,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:00,313 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-06-05 04:05:00,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:00,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:00,315 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:00,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1211 [2021-06-05 04:05:00,515 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:00,516 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-06-05 04:05:00,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:00,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979322985] [2021-06-05 04:05:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:00,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979322985] [2021-06-05 04:05:00,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979322985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:00,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668821163] [2021-06-05 04:05:00,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:00,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:00,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:00,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:02,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:02,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:02,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:02,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:02,012 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:02,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668821163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:02,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:02,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:02,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092329074] [2021-06-05 04:05:02,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:02,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:02,013 INFO L87 Difference]: Start difference. First operand 2548 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:02,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:02,171 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-06-05 04:05:02,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:02,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:02,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:02,174 INFO L225 Difference]: With dead ends: 2762 [2021-06-05 04:05:02,174 INFO L226 Difference]: Without dead ends: 2759 [2021-06-05 04:05:02,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:02,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-06-05 04:05:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-06-05 04:05:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 2.883640552995392) internal successors, (7509), 2604 states have internal predecessors, (7509), 0 states have call successors, (0), 0 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 04:05:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-06-05 04:05:02,199 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-06-05 04:05:02,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:02,199 INFO L482 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-06-05 04:05:02,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:02,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-06-05 04:05:02,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:02,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:02,202 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:02,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1386 [2021-06-05 04:05:02,402 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:02,402 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-06-05 04:05:02,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:02,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464185684] [2021-06-05 04:05:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:02,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464185684] [2021-06-05 04:05:02,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464185684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:02,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33817552] [2021-06-05 04:05:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:02,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:05:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:02,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:02,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:02,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:02,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:04,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:04,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:04,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:04,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:04,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33817552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:04,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:04,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:04,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592181731] [2021-06-05 04:05:04,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:04,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:04,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:04,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:04,318 INFO L87 Difference]: Start difference. First operand 2605 states and 7509 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:04,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:04,538 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-06-05 04:05:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:04,538 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:04,541 INFO L225 Difference]: With dead ends: 2824 [2021-06-05 04:05:04,541 INFO L226 Difference]: Without dead ends: 2821 [2021-06-05 04:05:04,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-06-05 04:05:04,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-06-05 04:05:04,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.900187617260788) internal successors, (7729), 2665 states have internal predecessors, (7729), 0 states have call successors, (0), 0 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 04:05:04,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-06-05 04:05:04,568 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-06-05 04:05:04,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:04,568 INFO L482 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-06-05 04:05:04,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:04,568 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-06-05 04:05:04,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:04,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:04,570 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:04,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1582,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:04,771 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:04,771 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-06-05 04:05:04,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:04,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113165252] [2021-06-05 04:05:04,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:04,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:04,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:04,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113165252] [2021-06-05 04:05:04,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113165252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:04,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541889472] [2021-06-05 04:05:04,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:04,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:04,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:05,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:05,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:06,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:06,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:06,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:06,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:06,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541889472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:06,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:06,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:06,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226020391] [2021-06-05 04:05:06,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:06,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:06,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:06,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:06,110 INFO L87 Difference]: Start difference. First operand 2666 states and 7729 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:06,272 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-06-05 04:05:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:06,276 INFO L225 Difference]: With dead ends: 2927 [2021-06-05 04:05:06,276 INFO L226 Difference]: Without dead ends: 2924 [2021-06-05 04:05:06,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-06-05 04:05:06,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-06-05 04:05:06,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.9219600725952812) internal successors, (8050), 2755 states have internal predecessors, (8050), 0 states have call successors, (0), 0 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 04:05:06,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-06-05 04:05:06,303 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-06-05 04:05:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:06,303 INFO L482 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-06-05 04:05:06,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-06-05 04:05:06,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:06,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:06,305 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:06,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1894 [2021-06-05 04:05:06,506 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:06,506 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-06-05 04:05:06,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:06,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688942816] [2021-06-05 04:05:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:06,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:06,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688942816] [2021-06-05 04:05:06,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688942816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:06,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796552099] [2021-06-05 04:05:06,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:06,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:06,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:06,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:06,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:06,824 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:06,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:07,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:07,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:07,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:07,730 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796552099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:07,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:07,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:07,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737338595] [2021-06-05 04:05:07,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:07,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:07,736 INFO L87 Difference]: Start difference. First operand 2756 states and 8050 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:08,027 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-06-05 04:05:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:08,030 INFO L225 Difference]: With dead ends: 3020 [2021-06-05 04:05:08,031 INFO L226 Difference]: Without dead ends: 3017 [2021-06-05 04:05:08,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-06-05 04:05:08,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-06-05 04:05:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9433895921237694) internal successors, (8371), 2844 states have internal predecessors, (8371), 0 states have call successors, (0), 0 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 04:05:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-06-05 04:05:08,058 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-06-05 04:05:08,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:08,058 INFO L482 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-06-05 04:05:08,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:08,058 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-06-05 04:05:08,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:08,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:08,061 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:08,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2060,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:08,262 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:08,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:08,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-06-05 04:05:08,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:08,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460882230] [2021-06-05 04:05:08,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:08,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460882230] [2021-06-05 04:05:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460882230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820101895] [2021-06-05 04:05:08,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:08,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:08,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:08,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:08,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:08,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:08,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:09,090 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 320 [2021-06-05 04:05:09,212 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 320 [2021-06-05 04:05:09,330 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 329 [2021-06-05 04:05:09,460 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 331 DAG size of output: 368 [2021-06-05 04:05:09,640 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 431 [2021-06-05 04:05:09,818 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 410 [2021-06-05 04:05:10,247 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 04:05:10,373 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 417 DAG size of output: 305 [2021-06-05 04:05:10,528 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 312 [2021-06-05 04:05:10,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:10,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:10,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:10,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:10,922 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:10,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820101895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:10,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:10,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:10,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457877477] [2021-06-05 04:05:10,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:10,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:10,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:10,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:10,923 INFO L87 Difference]: Start difference. First operand 2845 states and 8371 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:11,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:11,125 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-06-05 04:05:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:11,128 INFO L225 Difference]: With dead ends: 3164 [2021-06-05 04:05:11,128 INFO L226 Difference]: Without dead ends: 3161 [2021-06-05 04:05:11,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:11,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-06-05 04:05:11,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-06-05 04:05:11,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.965700965700966) internal successors, (8906), 3003 states have internal predecessors, (8906), 0 states have call successors, (0), 0 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 04:05:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-06-05 04:05:11,159 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-06-05 04:05:11,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:11,159 INFO L482 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-06-05 04:05:11,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-06-05 04:05:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:11,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:11,161 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:11,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2227 [2021-06-05 04:05:11,362 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:11,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:11,362 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-06-05 04:05:11,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:11,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152583817] [2021-06-05 04:05:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:11,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:11,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152583817] [2021-06-05 04:05:11,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152583817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:11,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736124640] [2021-06-05 04:05:11,409 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:11,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:11,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:11,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:11,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:11,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:11,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:12,700 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 04:05:12,817 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 244 [2021-06-05 04:05:12,947 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 249 [2021-06-05 04:05:13,087 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 333 [2021-06-05 04:05:13,293 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 302 [2021-06-05 04:05:13,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:13,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:13,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:13,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:13,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736124640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:13,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:13,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:13,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118236] [2021-06-05 04:05:13,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:13,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:13,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:13,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:13,881 INFO L87 Difference]: Start difference. First operand 3004 states and 8906 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:14,151 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-06-05 04:05:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:14,155 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 04:05:14,155 INFO L226 Difference]: Without dead ends: 3647 [2021-06-05 04:05:14,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-06-05 04:05:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-06-05 04:05:14,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 2.9773638968481375) internal successors, (10391), 3490 states have internal predecessors, (10391), 0 states have call successors, (0), 0 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 04:05:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-06-05 04:05:14,191 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-06-05 04:05:14,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:14,191 INFO L482 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-06-05 04:05:14,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:14,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-06-05 04:05:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 04:05:14,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:14,194 INFO L521 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:14,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2467 [2021-06-05 04:05:14,395 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:14,395 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-06-05 04:05:14,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:14,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001925289] [2021-06-05 04:05:14,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:14,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:14,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001925289] [2021-06-05 04:05:14,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001925289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:14,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699648627] [2021-06-05 04:05:14,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:14,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:14,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 04:05:14,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:14,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-06-05 04:05:15,853 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 225 [2021-06-05 04:05:16,027 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 04:05:16,175 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 291 [2021-06-05 04:05:16,345 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 298 [2021-06-05 04:05:16,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:05:16,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:05:16,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:05:16,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-06-05 04:05:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699648627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-06-05 04:05:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591919435] [2021-06-05 04:05:16,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:16,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:16,985 INFO L87 Difference]: Start difference. First operand 3491 states and 10391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:17,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:17,213 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-06-05 04:05:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 04:05:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:17,218 INFO L225 Difference]: With dead ends: 4057 [2021-06-05 04:05:17,218 INFO L226 Difference]: Without dead ends: 4054 [2021-06-05 04:05:17,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:17,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-06-05 04:05:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-06-05 04:05:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3905 states have (on average 2.9836107554417413) internal successors, (11651), 3905 states have internal predecessors, (11651), 0 states have call successors, (0), 0 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 04:05:17,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-06-05 04:05:17,260 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-06-05 04:05:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:17,260 INFO L482 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-06-05 04:05:17,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 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 04:05:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-06-05 04:05:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:17,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:17,264 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:17,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2674,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,464 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-06-05 04:05:17,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:17,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002195301] [2021-06-05 04:05:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:17,543 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002195301] [2021-06-05 04:05:17,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002195301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476497462] [2021-06-05 04:05:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:17,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:17,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:17,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:17,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:17,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476497462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:17,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:17,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:05:17,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854236808] [2021-06-05 04:05:17,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:05:17,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:17,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:05:17,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:17,611 INFO L87 Difference]: Start difference. First operand 3906 states and 11651 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:17,776 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-06-05 04:05:17,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:17,777 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:17,780 INFO L225 Difference]: With dead ends: 4087 [2021-06-05 04:05:17,780 INFO L226 Difference]: Without dead ends: 4087 [2021-06-05 04:05:17,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:05:17,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-06-05 04:05:17,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-06-05 04:05:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.982152095188826) internal successors, (11529), 3866 states have internal predecessors, (11529), 0 states have call successors, (0), 0 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 04:05:17,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-06-05 04:05:17,822 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-06-05 04:05:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:17,822 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-06-05 04:05:17,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-06-05 04:05:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:17,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:17,825 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:18,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2911 [2021-06-05 04:05:18,026 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:18,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:18,026 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-06-05 04:05:18,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:18,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224689769] [2021-06-05 04:05:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:18,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224689769] [2021-06-05 04:05:18,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224689769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:18,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59939434] [2021-06-05 04:05:18,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:18,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59939434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:18,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:18,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:05:18,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272899302] [2021-06-05 04:05:18,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:05:18,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:18,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:05:18,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:18,163 INFO L87 Difference]: Start difference. First operand 3867 states and 11529 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:18,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:18,390 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-06-05 04:05:18,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:05:18,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:18,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:18,394 INFO L225 Difference]: With dead ends: 4251 [2021-06-05 04:05:18,394 INFO L226 Difference]: Without dead ends: 4240 [2021-06-05 04:05:18,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:05:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-06-05 04:05:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-06-05 04:05:18,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978657752635639) internal successors, (11584), 3889 states have internal predecessors, (11584), 0 states have call successors, (0), 0 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 04:05:18,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-06-05 04:05:18,438 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-06-05 04:05:18,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:18,438 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-06-05 04:05:18,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:18,439 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-06-05 04:05:18,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:18,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:18,442 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:18,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2912,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:18,642 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:18,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:18,643 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-06-05 04:05:18,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:18,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960736699] [2021-06-05 04:05:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:18,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960736699] [2021-06-05 04:05:18,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960736699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:18,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879075066] [2021-06-05 04:05:18,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:18,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:18,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:18,752 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:18,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879075066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:18,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:18,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:18,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183986585] [2021-06-05 04:05:18,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:18,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:18,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:18,753 INFO L87 Difference]: Start difference. First operand 3890 states and 11584 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:18,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:18,882 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-06-05 04:05:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:18,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:18,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:18,887 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 04:05:18,887 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 04:05:18,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 04:05:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-06-05 04:05:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978143481614811) internal successors, (11582), 3889 states have internal predecessors, (11582), 0 states have call successors, (0), 0 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 04:05:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-06-05 04:05:18,925 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-06-05 04:05:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:18,925 INFO L482 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-06-05 04:05:18,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:18,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-06-05 04:05:18,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:18,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:18,928 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:19,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2913,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:19,129 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:19,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-06-05 04:05:19,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:19,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320707174] [2021-06-05 04:05:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:19,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320707174] [2021-06-05 04:05:19,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320707174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688112133] [2021-06-05 04:05:19,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:19,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:19,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:19,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:19,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688112133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:19,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:19,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541175357] [2021-06-05 04:05:19,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:19,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:19,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:19,246 INFO L87 Difference]: Start difference. First operand 3890 states and 11582 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:19,307 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-06-05 04:05:19,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:05:19,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:19,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:19,312 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 04:05:19,312 INFO L226 Difference]: Without dead ends: 4355 [2021-06-05 04:05:19,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-06-05 04:05:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-06-05 04:05:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.9733574754267975) internal successors, (11495), 3866 states have internal predecessors, (11495), 0 states have call successors, (0), 0 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 04:05:19,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-06-05 04:05:19,354 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-06-05 04:05:19,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:19,355 INFO L482 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-06-05 04:05:19,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-06-05 04:05:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:19,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:19,358 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:19,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2914,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:19,559 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-06-05 04:05:19,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:19,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709337715] [2021-06-05 04:05:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:19,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:19,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709337715] [2021-06-05 04:05:19,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709337715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409792074] [2021-06-05 04:05:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:19,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:19,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:19,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:19,669 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:19,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409792074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:19,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:19,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:19,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108086638] [2021-06-05 04:05:19,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:19,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:19,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:19,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:19,670 INFO L87 Difference]: Start difference. First operand 3867 states and 11495 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:19,784 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-06-05 04:05:19,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:19,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:19,788 INFO L225 Difference]: With dead ends: 4245 [2021-06-05 04:05:19,788 INFO L226 Difference]: Without dead ends: 4245 [2021-06-05 04:05:19,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-06-05 04:05:19,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-06-05 04:05:19,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 2.975172766828769) internal successors, (11624), 3907 states have internal predecessors, (11624), 0 states have call successors, (0), 0 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 04:05:19,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-06-05 04:05:19,828 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-06-05 04:05:19,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:19,828 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-06-05 04:05:19,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-06-05 04:05:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:19,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:19,831 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:20,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2915,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:20,032 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:20,032 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-06-05 04:05:20,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:20,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003230869] [2021-06-05 04:05:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:20,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:20,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:20,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003230869] [2021-06-05 04:05:20,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003230869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:20,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975679431] [2021-06-05 04:05:20,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:20,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:05:20,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:20,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:20,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:20,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975679431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:20,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:20,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:20,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987472594] [2021-06-05 04:05:20,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:20,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:20,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:20,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:20,138 INFO L87 Difference]: Start difference. First operand 3908 states and 11624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:20,269 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-06-05 04:05:20,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:20,273 INFO L225 Difference]: With dead ends: 4249 [2021-06-05 04:05:20,274 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 04:05:20,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 04:05:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-06-05 04:05:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 2.976257339800868) internal successors, (11658), 3917 states have internal predecessors, (11658), 0 states have call successors, (0), 0 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 04:05:20,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-06-05 04:05:20,314 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-06-05 04:05:20,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:20,314 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-06-05 04:05:20,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-06-05 04:05:20,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:20,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:20,317 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:20,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2916,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:20,518 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-06-05 04:05:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:20,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345702097] [2021-06-05 04:05:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:20,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345702097] [2021-06-05 04:05:20,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345702097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:20,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390964777] [2021-06-05 04:05:20,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:20,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:20,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390964777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:20,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:20,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:20,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392173196] [2021-06-05 04:05:20,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:20,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:20,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:20,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:20,624 INFO L87 Difference]: Start difference. First operand 3918 states and 11658 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:20,764 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-06-05 04:05:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:20,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:20,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:20,768 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 04:05:20,768 INFO L226 Difference]: Without dead ends: 4122 [2021-06-05 04:05:20,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 89.7ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-06-05 04:05:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-06-05 04:05:20,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9746088740702743) internal successors, (11598), 3899 states have internal predecessors, (11598), 0 states have call successors, (0), 0 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 04:05:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-06-05 04:05:20,809 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-06-05 04:05:20,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:20,809 INFO L482 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-06-05 04:05:20,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:20,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-06-05 04:05:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:20,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:20,813 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:21,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2917,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:21,029 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:21,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:21,029 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-06-05 04:05:21,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:21,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53925052] [2021-06-05 04:05:21,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:21,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53925052] [2021-06-05 04:05:21,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53925052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:21,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667580675] [2021-06-05 04:05:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:21,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:21,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667580675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:21,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:21,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:21,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98860514] [2021-06-05 04:05:21,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:21,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:21,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:21,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:21,140 INFO L87 Difference]: Start difference. First operand 3900 states and 11598 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:21,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:21,198 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-06-05 04:05:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:05:21,198 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:21,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:21,202 INFO L225 Difference]: With dead ends: 4352 [2021-06-05 04:05:21,202 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 04:05:21,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 04:05:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-06-05 04:05:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.9741224698949527) internal successors, (11608), 3903 states have internal predecessors, (11608), 0 states have call successors, (0), 0 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 04:05:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-06-05 04:05:21,244 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-06-05 04:05:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:21,244 INFO L482 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-06-05 04:05:21,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-06-05 04:05:21,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:21,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:21,248 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:21,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:21,448 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-06-05 04:05:21,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:21,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576383262] [2021-06-05 04:05:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:21,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576383262] [2021-06-05 04:05:21,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576383262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:21,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901873603] [2021-06-05 04:05:21,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:21,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:21,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:21,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:21,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901873603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:21,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:21,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:05:21,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450981516] [2021-06-05 04:05:21,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:21,563 INFO L87 Difference]: Start difference. First operand 3904 states and 11608 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:21,731 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-06-05 04:05:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:21,735 INFO L225 Difference]: With dead ends: 4085 [2021-06-05 04:05:21,735 INFO L226 Difference]: Without dead ends: 4079 [2021-06-05 04:05:21,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-06-05 04:05:21,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-06-05 04:05:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.978238341968912) internal successors, (11496), 3860 states have internal predecessors, (11496), 0 states have call successors, (0), 0 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 04:05:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-06-05 04:05:21,774 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-06-05 04:05:21,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:21,774 INFO L482 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-06-05 04:05:21,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-06-05 04:05:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:21,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:21,778 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:21,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2919 [2021-06-05 04:05:21,978 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:21,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:21,979 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-06-05 04:05:21,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:21,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608894271] [2021-06-05 04:05:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:22,031 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:22,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:22,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608894271] [2021-06-05 04:05:22,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608894271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30240706] [2021-06-05 04:05:22,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:22,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:22,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:22,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30240706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:22,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:05:22,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312853136] [2021-06-05 04:05:22,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:22,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:22,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:22,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:22,102 INFO L87 Difference]: Start difference. First operand 3861 states and 11496 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:22,178 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-06-05 04:05:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:22,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:22,182 INFO L225 Difference]: With dead ends: 4587 [2021-06-05 04:05:22,182 INFO L226 Difference]: Without dead ends: 4587 [2021-06-05 04:05:22,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-06-05 04:05:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-06-05 04:05:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 2.9734028683181224) internal successors, (11403), 3835 states have internal predecessors, (11403), 0 states have call successors, (0), 0 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 04:05:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-06-05 04:05:22,222 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-06-05 04:05:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:22,222 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-06-05 04:05:22,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-06-05 04:05:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:22,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:22,226 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:22,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2920 [2021-06-05 04:05:22,429 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:22,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:22,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-06-05 04:05:22,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:22,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787371590] [2021-06-05 04:05:22,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:22,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:22,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:22,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787371590] [2021-06-05 04:05:22,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787371590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068169827] [2021-06-05 04:05:22,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:22,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:22,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:22,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:22,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:22,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068169827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:22,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196246883] [2021-06-05 04:05:22,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:22,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:22,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:22,541 INFO L87 Difference]: Start difference. First operand 3836 states and 11403 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:22,644 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-06-05 04:05:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:22,644 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:22,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:22,648 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 04:05:22,648 INFO L226 Difference]: Without dead ends: 4225 [2021-06-05 04:05:22,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:05:22,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-06-05 04:05:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-06-05 04:05:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 2.975103734439834) internal successors, (11472), 3856 states have internal predecessors, (11472), 0 states have call successors, (0), 0 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 04:05:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-06-05 04:05:22,690 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-06-05 04:05:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:22,690 INFO L482 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-06-05 04:05:22,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-06-05 04:05:22,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:22,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:22,693 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:22,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2921 [2021-06-05 04:05:22,894 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:22,894 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-06-05 04:05:22,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:22,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638195497] [2021-06-05 04:05:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:22,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638195497] [2021-06-05 04:05:22,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638195497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643175498] [2021-06-05 04:05:22,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:22,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:22,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:22,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:22,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:22,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643175498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:22,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:22,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:22,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229837654] [2021-06-05 04:05:22,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:22,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:22,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:22,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:22,997 INFO L87 Difference]: Start difference. First operand 3857 states and 11472 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:23,121 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-06-05 04:05:23,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:23,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:23,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:23,125 INFO L225 Difference]: With dead ends: 4205 [2021-06-05 04:05:23,125 INFO L226 Difference]: Without dead ends: 4203 [2021-06-05 04:05:23,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-06-05 04:05:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-06-05 04:05:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.9762150982419855) internal successors, (11512), 3868 states have internal predecessors, (11512), 0 states have call successors, (0), 0 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 04:05:23,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-06-05 04:05:23,170 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-06-05 04:05:23,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:23,170 INFO L482 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-06-05 04:05:23,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:23,170 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-06-05 04:05:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:23,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:23,173 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:23,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2922,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:23,374 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:23,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:23,375 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-06-05 04:05:23,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:23,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895830515] [2021-06-05 04:05:23,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:23,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:23,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895830515] [2021-06-05 04:05:23,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895830515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:23,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896283305] [2021-06-05 04:05:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:23,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:05:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:23,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896283305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:23,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:23,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:23,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463216522] [2021-06-05 04:05:23,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:23,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:23,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:23,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:23,478 INFO L87 Difference]: Start difference. First operand 3869 states and 11512 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:23,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:23,621 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-06-05 04:05:23,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:23,621 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:23,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:23,625 INFO L225 Difference]: With dead ends: 4090 [2021-06-05 04:05:23,625 INFO L226 Difference]: Without dead ends: 4088 [2021-06-05 04:05:23,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-06-05 04:05:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-06-05 04:05:23,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.973416731821736) internal successors, (11409), 3837 states have internal predecessors, (11409), 0 states have call successors, (0), 0 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 04:05:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-06-05 04:05:23,665 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-06-05 04:05:23,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:23,665 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-06-05 04:05:23,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:23,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-06-05 04:05:23,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:23,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:23,669 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:23,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2923,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:23,869 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-06-05 04:05:23,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:23,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605904815] [2021-06-05 04:05:23,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:23,915 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:23,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605904815] [2021-06-05 04:05:23,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605904815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:23,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676197141] [2021-06-05 04:05:23,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:23,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:23,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:23,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676197141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:23,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:23,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96465903] [2021-06-05 04:05:23,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:23,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:23,976 INFO L87 Difference]: Start difference. First operand 3838 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:24,032 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-06-05 04:05:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:24,036 INFO L225 Difference]: With dead ends: 4172 [2021-06-05 04:05:24,036 INFO L226 Difference]: Without dead ends: 4172 [2021-06-05 04:05:24,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:24,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-06-05 04:05:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-06-05 04:05:24,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9699503527567286) internal successors, (11366), 3827 states have internal predecessors, (11366), 0 states have call successors, (0), 0 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 04:05:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-06-05 04:05:24,078 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-06-05 04:05:24,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:24,078 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-06-05 04:05:24,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-06-05 04:05:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:24,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:24,081 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:24,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2924,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:24,282 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:24,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:24,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-06-05 04:05:24,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:24,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768347730] [2021-06-05 04:05:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:24,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:24,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768347730] [2021-06-05 04:05:24,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768347730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:24,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197408766] [2021-06-05 04:05:24,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:24,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:24,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:24,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:24,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:24,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197408766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:24,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:24,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:24,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162580917] [2021-06-05 04:05:24,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:24,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:24,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:24,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:24,414 INFO L87 Difference]: Start difference. First operand 3828 states and 11366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:24,560 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-06-05 04:05:24,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:05:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:24,564 INFO L225 Difference]: With dead ends: 4046 [2021-06-05 04:05:24,564 INFO L226 Difference]: Without dead ends: 4044 [2021-06-05 04:05:24,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:24,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-06-05 04:05:24,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-06-05 04:05:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.969427750195976) internal successors, (11364), 3827 states have internal predecessors, (11364), 0 states have call successors, (0), 0 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 04:05:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-06-05 04:05:24,606 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-06-05 04:05:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:24,606 INFO L482 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-06-05 04:05:24,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:24,606 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-06-05 04:05:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:24,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:24,609 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:24,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2925,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:24,810 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-06-05 04:05:24,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:24,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290063632] [2021-06-05 04:05:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:24,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:24,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290063632] [2021-06-05 04:05:24,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290063632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:24,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82637843] [2021-06-05 04:05:24,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:24,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:24,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:24,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:24,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82637843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:24,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:24,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:24,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619440213] [2021-06-05 04:05:24,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:24,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:24,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:24,929 INFO L87 Difference]: Start difference. First operand 3828 states and 11364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:25,009 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-06-05 04:05:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:25,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:25,013 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 04:05:25,013 INFO L226 Difference]: Without dead ends: 4424 [2021-06-05 04:05:25,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:25,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-06-05 04:05:25,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-06-05 04:05:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.9689861871253584) internal successors, (11392), 3837 states have internal predecessors, (11392), 0 states have call successors, (0), 0 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 04:05:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-06-05 04:05:25,053 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-06-05 04:05:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:25,054 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-06-05 04:05:25,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-06-05 04:05:25,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:25,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:25,057 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:25,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2926,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,257 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:25,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:25,258 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-06-05 04:05:25,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:25,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617591579] [2021-06-05 04:05:25,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617591579] [2021-06-05 04:05:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617591579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11120387] [2021-06-05 04:05:25,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:25,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11120387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:25,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:25,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832168823] [2021-06-05 04:05:25,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:25,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:25,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:25,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:25,369 INFO L87 Difference]: Start difference. First operand 3838 states and 11392 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:25,496 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-06-05 04:05:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:25,500 INFO L225 Difference]: With dead ends: 4109 [2021-06-05 04:05:25,500 INFO L226 Difference]: Without dead ends: 4106 [2021-06-05 04:05:25,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-06-05 04:05:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-06-05 04:05:25,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 2.968489583333333) internal successors, (11399), 3840 states have internal predecessors, (11399), 0 states have call successors, (0), 0 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 04:05:25,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-06-05 04:05:25,540 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-06-05 04:05:25,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:25,540 INFO L482 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-06-05 04:05:25,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-06-05 04:05:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:25,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:25,543 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:25,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2927,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,744 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:25,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-06-05 04:05:25,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:25,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746343512] [2021-06-05 04:05:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746343512] [2021-06-05 04:05:25,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746343512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955222265] [2021-06-05 04:05:25,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:25,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:25,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:25,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:25,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:25,859 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:25,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955222265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:25,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:25,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:25,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140610585] [2021-06-05 04:05:25,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:25,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:25,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:25,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:25,860 INFO L87 Difference]: Start difference. First operand 3841 states and 11399 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:25,957 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-06-05 04:05:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:25,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:25,962 INFO L225 Difference]: With dead ends: 5862 [2021-06-05 04:05:25,962 INFO L226 Difference]: Without dead ends: 5862 [2021-06-05 04:05:25,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-06-05 04:05:26,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-06-05 04:05:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 3.0290258449304175) internal successors, (15236), 5030 states have internal predecessors, (15236), 0 states have call successors, (0), 0 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 04:05:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-06-05 04:05:26,018 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-06-05 04:05:26,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:26,019 INFO L482 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-06-05 04:05:26,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-06-05 04:05:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:26,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:26,023 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:26,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2928,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:26,223 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:26,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:26,224 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-06-05 04:05:26,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:26,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753486185] [2021-06-05 04:05:26,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:26,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753486185] [2021-06-05 04:05:26,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753486185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:26,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208735172] [2021-06-05 04:05:26,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:26,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:26,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:26,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:05:26,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208735172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:26,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:26,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:05:26,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013297534] [2021-06-05 04:05:26,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:05:26,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:26,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:05:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:05:26,323 INFO L87 Difference]: Start difference. First operand 5031 states and 15236 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:26,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:26,448 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-06-05 04:05:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:05:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:26,453 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 04:05:26,453 INFO L226 Difference]: Without dead ends: 5376 [2021-06-05 04:05:26,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-06-05 04:05:26,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-06-05 04:05:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 3.0334448160535117) internal successors, (15419), 5083 states have internal predecessors, (15419), 0 states have call successors, (0), 0 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 04:05:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-06-05 04:05:26,508 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-06-05 04:05:26,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:26,508 INFO L482 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-06-05 04:05:26,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:26,508 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-06-05 04:05:26,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:26,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:26,513 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:26,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:26,713 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:26,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:26,713 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-06-05 04:05:26,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:26,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860018043] [2021-06-05 04:05:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:26,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860018043] [2021-06-05 04:05:26,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860018043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:26,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502744958] [2021-06-05 04:05:26,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:05:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:26,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502744958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:26,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:26,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:26,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064680442] [2021-06-05 04:05:26,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:26,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:26,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:26,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:26,838 INFO L87 Difference]: Start difference. First operand 5084 states and 15419 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:26,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:26,981 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-06-05 04:05:26,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:26,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:26,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:26,987 INFO L225 Difference]: With dead ends: 5286 [2021-06-05 04:05:26,987 INFO L226 Difference]: Without dead ends: 5280 [2021-06-05 04:05:26,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-06-05 04:05:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-06-05 04:05:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.034095388253843) internal successors, (15395), 5074 states have internal predecessors, (15395), 0 states have call successors, (0), 0 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 04:05:27,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-06-05 04:05:27,050 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-06-05 04:05:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:27,050 INFO L482 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-06-05 04:05:27,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-06-05 04:05:27,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:27,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:27,055 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:27,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2930 [2021-06-05 04:05:27,265 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-06-05 04:05:27,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:27,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290935057] [2021-06-05 04:05:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:27,316 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:27,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290935057] [2021-06-05 04:05:27,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290935057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:27,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938118591] [2021-06-05 04:05:27,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:27,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:27,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:27,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:27,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938118591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:27,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:27,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:27,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387141200] [2021-06-05 04:05:27,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:27,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:27,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:27,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:27,375 INFO L87 Difference]: Start difference. First operand 5075 states and 15395 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:27,466 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-06-05 04:05:27,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:27,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:27,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:27,472 INFO L225 Difference]: With dead ends: 6136 [2021-06-05 04:05:27,472 INFO L226 Difference]: Without dead ends: 6136 [2021-06-05 04:05:27,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-06-05 04:05:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-06-05 04:05:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.9856410256410255) internal successors, (11644), 3900 states have internal predecessors, (11644), 0 states have call successors, (0), 0 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 04:05:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-06-05 04:05:27,521 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-06-05 04:05:27,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:27,521 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-06-05 04:05:27,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:27,522 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-06-05 04:05:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:27,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:27,525 INFO L521 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:27,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2931 [2021-06-05 04:05:27,725 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:27,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-06-05 04:05:27,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:27,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348233690] [2021-06-05 04:05:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:27,771 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:27,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:27,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348233690] [2021-06-05 04:05:27,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348233690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:27,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396505478] [2021-06-05 04:05:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:05:27,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 04:05:27,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396505478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:27,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:27,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-06-05 04:05:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327582241] [2021-06-05 04:05:27,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:05:27,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:05:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:27,901 INFO L87 Difference]: Start difference. First operand 3901 states and 11644 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:05:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:28,996 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-06-05 04:05:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-06-05 04:05:28,996 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:29,004 INFO L225 Difference]: With dead ends: 9069 [2021-06-05 04:05:29,005 INFO L226 Difference]: Without dead ends: 9055 [2021-06-05 04:05:29,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 829.1ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 04:05:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-06-05 04:05:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-06-05 04:05:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.9433717044188636) internal successors, (15853), 5386 states have internal predecessors, (15853), 0 states have call successors, (0), 0 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 04:05:29,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-06-05 04:05:29,082 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-06-05 04:05:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:29,082 INFO L482 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-06-05 04:05:29,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 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 04:05:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-06-05 04:05:29,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:29,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:29,087 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:29,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2932,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:29,287 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-06-05 04:05:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:29,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008507761] [2021-06-05 04:05:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:29,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:29,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008507761] [2021-06-05 04:05:29,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008507761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547938419] [2021-06-05 04:05:29,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:29,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:29,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:29,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:29,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:29,384 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:29,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547938419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:29,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:29,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958756384] [2021-06-05 04:05:29,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:29,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:29,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:29,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:29,385 INFO L87 Difference]: Start difference. First operand 5387 states and 15853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:29,508 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-06-05 04:05:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:29,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:29,514 INFO L225 Difference]: With dead ends: 5771 [2021-06-05 04:05:29,514 INFO L226 Difference]: Without dead ends: 5767 [2021-06-05 04:05:29,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:29,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-06-05 04:05:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-06-05 04:05:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 2.9403652627655608) internal successors, (15778), 5366 states have internal predecessors, (15778), 0 states have call successors, (0), 0 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 04:05:29,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-06-05 04:05:29,575 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-06-05 04:05:29,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:29,575 INFO L482 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-06-05 04:05:29,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:29,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-06-05 04:05:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:29,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:29,579 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:29,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2933 [2021-06-05 04:05:29,779 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-06-05 04:05:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:29,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672659570] [2021-06-05 04:05:29,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:29,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:29,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672659570] [2021-06-05 04:05:29,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672659570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938001909] [2021-06-05 04:05:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:29,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:05:29,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:29,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938001909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:29,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:29,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517932420] [2021-06-05 04:05:29,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:29,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:29,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:29,884 INFO L87 Difference]: Start difference. First operand 5367 states and 15778 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:29,948 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-06-05 04:05:29,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:05:29,948 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:29,953 INFO L225 Difference]: With dead ends: 5976 [2021-06-05 04:05:29,954 INFO L226 Difference]: Without dead ends: 5976 [2021-06-05 04:05:29,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-06-05 04:05:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-06-05 04:05:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.9381404881684365) internal successors, (15769), 5367 states have internal predecessors, (15769), 0 states have call successors, (0), 0 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 04:05:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-06-05 04:05:30,016 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-06-05 04:05:30,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:30,017 INFO L482 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-06-05 04:05:30,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-06-05 04:05:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:30,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:30,021 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:30,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2934,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:30,222 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:30,222 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-06-05 04:05:30,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:30,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609847040] [2021-06-05 04:05:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:30,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:30,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609847040] [2021-06-05 04:05:30,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609847040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:30,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748875137] [2021-06-05 04:05:30,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:30,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:05:30,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:30,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:30,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748875137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:30,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:30,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:05:30,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263727913] [2021-06-05 04:05:30,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:30,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:30,335 INFO L87 Difference]: Start difference. First operand 5368 states and 15769 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:30,402 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-06-05 04:05:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:30,403 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:30,407 INFO L225 Difference]: With dead ends: 5731 [2021-06-05 04:05:30,407 INFO L226 Difference]: Without dead ends: 5731 [2021-06-05 04:05:30,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:30,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-06-05 04:05:30,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-06-05 04:05:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.9332581312276744) internal successors, (15602), 5319 states have internal predecessors, (15602), 0 states have call successors, (0), 0 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 04:05:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-06-05 04:05:30,463 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-06-05 04:05:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:30,463 INFO L482 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-06-05 04:05:30,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-06-05 04:05:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:30,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:30,467 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:30,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2935 [2021-06-05 04:05:30,668 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-06-05 04:05:30,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:30,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740339559] [2021-06-05 04:05:30,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:30,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740339559] [2021-06-05 04:05:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740339559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408681051] [2021-06-05 04:05:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:30,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:30,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408681051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:30,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:30,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:30,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951878293] [2021-06-05 04:05:30,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:30,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:30,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:30,783 INFO L87 Difference]: Start difference. First operand 5320 states and 15602 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:30,879 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-06-05 04:05:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:30,879 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:30,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:30,885 INFO L225 Difference]: With dead ends: 6238 [2021-06-05 04:05:30,885 INFO L226 Difference]: Without dead ends: 6238 [2021-06-05 04:05:30,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:30,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-06-05 04:05:30,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-06-05 04:05:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.922400611620795) internal successors, (15290), 5232 states have internal predecessors, (15290), 0 states have call successors, (0), 0 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 04:05:30,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-06-05 04:05:30,942 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-06-05 04:05:30,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:30,942 INFO L482 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-06-05 04:05:30,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:30,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-06-05 04:05:30,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:30,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:30,946 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:31,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2936,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,147 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-06-05 04:05:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:31,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008291055] [2021-06-05 04:05:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:31,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008291055] [2021-06-05 04:05:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008291055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059475214] [2021-06-05 04:05:31,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:31,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:31,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059475214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:31,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:31,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679299272] [2021-06-05 04:05:31,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:31,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:31,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:31,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:31,267 INFO L87 Difference]: Start difference. First operand 5233 states and 15290 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:31,405 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-06-05 04:05:31,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:05:31,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:31,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:31,412 INFO L225 Difference]: With dead ends: 8227 [2021-06-05 04:05:31,413 INFO L226 Difference]: Without dead ends: 8227 [2021-06-05 04:05:31,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:31,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-06-05 04:05:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-06-05 04:05:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 2.962220862649128) internal successors, (19367), 6538 states have internal predecessors, (19367), 0 states have call successors, (0), 0 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 04:05:31,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-06-05 04:05:31,495 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-06-05 04:05:31,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:31,495 INFO L482 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-06-05 04:05:31,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:31,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-06-05 04:05:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:31,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:31,501 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:31,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2937,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,701 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:31,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:31,701 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-06-05 04:05:31,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:31,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197795542] [2021-06-05 04:05:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197795542] [2021-06-05 04:05:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197795542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452983914] [2021-06-05 04:05:31,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:31,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:05:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:31,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452983914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:31,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:31,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:31,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408251448] [2021-06-05 04:05:31,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:31,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:31,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:31,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:31,824 INFO L87 Difference]: Start difference. First operand 6539 states and 19367 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:31,954 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-06-05 04:05:31,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:05:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:31,962 INFO L225 Difference]: With dead ends: 8105 [2021-06-05 04:05:31,962 INFO L226 Difference]: Without dead ends: 8105 [2021-06-05 04:05:31,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-06-05 04:05:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-06-05 04:05:32,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.929042264443583) internal successors, (15108), 5158 states have internal predecessors, (15108), 0 states have call successors, (0), 0 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 04:05:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-06-05 04:05:32,027 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-06-05 04:05:32,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:32,028 INFO L482 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-06-05 04:05:32,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,028 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-06-05 04:05:32,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:32,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:32,032 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:32,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2938,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:32,232 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-06-05 04:05:32,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:32,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825277899] [2021-06-05 04:05:32,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:32,276 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:32,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:32,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825277899] [2021-06-05 04:05:32,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825277899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95159662] [2021-06-05 04:05:32,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:32,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:32,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:32,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95159662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:32,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:32,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423836747] [2021-06-05 04:05:32,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:32,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:32,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:32,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:32,333 INFO L87 Difference]: Start difference. First operand 5159 states and 15108 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:32,453 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-06-05 04:05:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:32,453 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:32,458 INFO L225 Difference]: With dead ends: 5517 [2021-06-05 04:05:32,458 INFO L226 Difference]: Without dead ends: 5513 [2021-06-05 04:05:32,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-06-05 04:05:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-06-05 04:05:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 2.927852998065764) internal successors, (15137), 5170 states have internal predecessors, (15137), 0 states have call successors, (0), 0 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 04:05:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-06-05 04:05:32,541 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-06-05 04:05:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:32,541 INFO L482 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-06-05 04:05:32,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-06-05 04:05:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:32,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:32,546 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:32,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2939,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:32,746 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-06-05 04:05:32,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:32,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222371542] [2021-06-05 04:05:32,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:32,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:32,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222371542] [2021-06-05 04:05:32,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222371542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799780322] [2021-06-05 04:05:32,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:32,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:05:32,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:32,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:32,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:32,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799780322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:32,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:32,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:32,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985538820] [2021-06-05 04:05:32,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:32,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:32,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:32,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:32,850 INFO L87 Difference]: Start difference. First operand 5171 states and 15137 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:32,918 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-06-05 04:05:32,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:32,918 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:32,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:32,923 INFO L225 Difference]: With dead ends: 5892 [2021-06-05 04:05:32,923 INFO L226 Difference]: Without dead ends: 5892 [2021-06-05 04:05:32,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-06-05 04:05:32,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-06-05 04:05:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9260903126206097) internal successors, (15163), 5182 states have internal predecessors, (15163), 0 states have call successors, (0), 0 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 04:05:32,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-06-05 04:05:32,977 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-06-05 04:05:32,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:32,977 INFO L482 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-06-05 04:05:32,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:32,978 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-06-05 04:05:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:32,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:32,982 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:33,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2940 [2021-06-05 04:05:33,182 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:33,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:33,182 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-06-05 04:05:33,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:33,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446388379] [2021-06-05 04:05:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:33,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:33,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446388379] [2021-06-05 04:05:33,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446388379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:33,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278509596] [2021-06-05 04:05:33,245 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:33,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:05:33,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:33,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:33,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:33,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278509596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:33,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:33,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021995800] [2021-06-05 04:05:33,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:33,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:33,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:33,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:33,306 INFO L87 Difference]: Start difference. First operand 5183 states and 15163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:33,385 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-06-05 04:05:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:33,386 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:33,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:33,391 INFO L225 Difference]: With dead ends: 5922 [2021-06-05 04:05:33,391 INFO L226 Difference]: Without dead ends: 5922 [2021-06-05 04:05:33,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:05:33,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-06-05 04:05:33,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-06-05 04:05:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.924666795441375) internal successors, (15141), 5177 states have internal predecessors, (15141), 0 states have call successors, (0), 0 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 04:05:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-06-05 04:05:33,454 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-06-05 04:05:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:33,454 INFO L482 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-06-05 04:05:33,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-06-05 04:05:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:33,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:33,459 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:33,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2941 [2021-06-05 04:05:33,660 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:33,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-06-05 04:05:33,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:33,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17217777] [2021-06-05 04:05:33,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:33,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17217777] [2021-06-05 04:05:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17217777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855896970] [2021-06-05 04:05:33,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:33,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:33,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855896970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:33,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:33,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:33,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463267893] [2021-06-05 04:05:33,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:33,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:33,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:33,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:33,768 INFO L87 Difference]: Start difference. First operand 5178 states and 15141 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:33,842 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-06-05 04:05:33,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:05:33,842 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:33,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:33,850 INFO L225 Difference]: With dead ends: 8667 [2021-06-05 04:05:33,850 INFO L226 Difference]: Without dead ends: 8667 [2021-06-05 04:05:33,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:33,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-06-05 04:05:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-06-05 04:05:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8166 states have (on average 2.984570168993387) internal successors, (24372), 8166 states have internal predecessors, (24372), 0 states have call successors, (0), 0 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 04:05:33,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-06-05 04:05:33,946 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-06-05 04:05:33,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:33,946 INFO L482 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-06-05 04:05:33,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:33,946 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-06-05 04:05:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:33,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:33,953 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:34,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2942 [2021-06-05 04:05:34,153 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-06-05 04:05:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434819332] [2021-06-05 04:05:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:34,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:34,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434819332] [2021-06-05 04:05:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434819332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399685844] [2021-06-05 04:05:34,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:34,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:34,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:34,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:34,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:34,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399685844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:34,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:34,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029072353] [2021-06-05 04:05:34,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:34,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:34,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:34,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:34,271 INFO L87 Difference]: Start difference. First operand 8167 states and 24372 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:34,386 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-06-05 04:05:34,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:34,394 INFO L225 Difference]: With dead ends: 9066 [2021-06-05 04:05:34,394 INFO L226 Difference]: Without dead ends: 9066 [2021-06-05 04:05:34,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-06-05 04:05:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-06-05 04:05:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 2.981218905472637) internal successors, (23969), 8040 states have internal predecessors, (23969), 0 states have call successors, (0), 0 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 04:05:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-06-05 04:05:34,492 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-06-05 04:05:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:34,492 INFO L482 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-06-05 04:05:34,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-06-05 04:05:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:34,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:34,499 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:34,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2943,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:34,699 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:34,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-06-05 04:05:34,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:34,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951700297] [2021-06-05 04:05:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:34,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:34,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951700297] [2021-06-05 04:05:34,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951700297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678681629] [2021-06-05 04:05:34,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:34,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:05:34,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:34,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:34,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:34,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678681629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:34,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:34,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:34,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227714969] [2021-06-05 04:05:34,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:34,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:34,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:34,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:34,821 INFO L87 Difference]: Start difference. First operand 8041 states and 23969 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:34,984 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-06-05 04:05:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:34,998 INFO L225 Difference]: With dead ends: 12727 [2021-06-05 04:05:34,998 INFO L226 Difference]: Without dead ends: 12727 [2021-06-05 04:05:34,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:35,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-06-05 04:05:35,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-06-05 04:05:35,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 3.0277777777777777) internal successors, (34117), 11268 states have internal predecessors, (34117), 0 states have call successors, (0), 0 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 04:05:35,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-06-05 04:05:35,148 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-06-05 04:05:35,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:35,149 INFO L482 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-06-05 04:05:35,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-06-05 04:05:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:35,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:35,158 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:35,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2944 [2021-06-05 04:05:35,358 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:35,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:35,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-06-05 04:05:35,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:35,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039900322] [2021-06-05 04:05:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:35,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039900322] [2021-06-05 04:05:35,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039900322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:35,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590889815] [2021-06-05 04:05:35,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:35,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:35,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:35,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:35,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590889815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:35,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:35,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:35,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496842421] [2021-06-05 04:05:35,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:35,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:35,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:35,470 INFO L87 Difference]: Start difference. First operand 11269 states and 34117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:35,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:35,550 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-06-05 04:05:35,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:05:35,551 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:35,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:35,563 INFO L225 Difference]: With dead ends: 11783 [2021-06-05 04:05:35,563 INFO L226 Difference]: Without dead ends: 11783 [2021-06-05 04:05:35,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-06-05 04:05:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-06-05 04:05:35,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 3.027368046916652) internal successors, (34070), 11254 states have internal predecessors, (34070), 0 states have call successors, (0), 0 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 04:05:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-06-05 04:05:35,701 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-06-05 04:05:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:35,701 INFO L482 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-06-05 04:05:35,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-06-05 04:05:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:35,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:35,710 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:35,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2945,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:35,911 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-06-05 04:05:35,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:35,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68662869] [2021-06-05 04:05:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:35,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:35,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68662869] [2021-06-05 04:05:35,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68662869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060433968] [2021-06-05 04:05:35,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:35,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:35,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:35,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:35,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:36,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060433968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:36,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:36,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:36,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269835522] [2021-06-05 04:05:36,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:36,030 INFO L87 Difference]: Start difference. First operand 11255 states and 34070 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:36,181 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-06-05 04:05:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:36,194 INFO L225 Difference]: With dead ends: 12824 [2021-06-05 04:05:36,195 INFO L226 Difference]: Without dead ends: 12824 [2021-06-05 04:05:36,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-06-05 04:05:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-06-05 04:05:36,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.9608333333333334) internal successors, (21318), 7200 states have internal predecessors, (21318), 0 states have call successors, (0), 0 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 04:05:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-06-05 04:05:36,314 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-06-05 04:05:36,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:36,314 INFO L482 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-06-05 04:05:36,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-06-05 04:05:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:36,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:36,320 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:36,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2946 [2021-06-05 04:05:36,523 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:36,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-06-05 04:05:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:36,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656920783] [2021-06-05 04:05:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:36,581 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:36,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:36,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656920783] [2021-06-05 04:05:36,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656920783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:36,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783563551] [2021-06-05 04:05:36,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:36,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:36,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:36,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:36,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:36,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783563551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:36,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:36,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998100568] [2021-06-05 04:05:36,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:36,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:36,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:36,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:36,645 INFO L87 Difference]: Start difference. First operand 7201 states and 21318 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:36,828 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-06-05 04:05:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:36,841 INFO L225 Difference]: With dead ends: 10561 [2021-06-05 04:05:36,841 INFO L226 Difference]: Without dead ends: 10561 [2021-06-05 04:05:36,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-06-05 04:05:36,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-06-05 04:05:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.947282252783235) internal successors, (18002), 6108 states have internal predecessors, (18002), 0 states have call successors, (0), 0 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 04:05:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-06-05 04:05:36,934 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-06-05 04:05:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:36,934 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-06-05 04:05:36,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:36,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-06-05 04:05:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:36,939 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:36,939 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:37,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2947,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,140 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:37,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-06-05 04:05:37,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:37,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406983481] [2021-06-05 04:05:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:05:37,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406983481] [2021-06-05 04:05:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406983481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232475759] [2021-06-05 04:05:37,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:37,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:05:37,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232475759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:37,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-05 04:05:37,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012545595] [2021-06-05 04:05:37,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:05:37,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:37,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:05:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:05:37,239 INFO L87 Difference]: Start difference. First operand 6109 states and 18002 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:37,367 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-06-05 04:05:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:05:37,367 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:37,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:37,374 INFO L225 Difference]: With dead ends: 6375 [2021-06-05 04:05:37,374 INFO L226 Difference]: Without dead ends: 6371 [2021-06-05 04:05:37,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:37,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-06-05 04:05:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-06-05 04:05:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.9466273739358217) internal successors, (17998), 6108 states have internal predecessors, (17998), 0 states have call successors, (0), 0 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 04:05:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-06-05 04:05:37,446 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-06-05 04:05:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:37,446 INFO L482 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-06-05 04:05:37,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-06-05 04:05:37,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:37,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:37,452 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:37,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2948,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,652 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:37,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:37,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-06-05 04:05:37,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:37,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415704583] [2021-06-05 04:05:37,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:37,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:37,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415704583] [2021-06-05 04:05:37,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415704583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52249477] [2021-06-05 04:05:37,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:37,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:37,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:37,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:37,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:37,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52249477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:37,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:37,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:37,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390181686] [2021-06-05 04:05:37,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:37,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:37,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:37,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:37,787 INFO L87 Difference]: Start difference. First operand 6109 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:37,940 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-06-05 04:05:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:05:37,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:37,947 INFO L225 Difference]: With dead ends: 7567 [2021-06-05 04:05:37,947 INFO L226 Difference]: Without dead ends: 7567 [2021-06-05 04:05:37,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:37,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-06-05 04:05:38,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-06-05 04:05:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.927445432497979) internal successors, (14485), 4948 states have internal predecessors, (14485), 0 states have call successors, (0), 0 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 04:05:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-06-05 04:05:38,010 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-06-05 04:05:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:38,011 INFO L482 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-06-05 04:05:38,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-06-05 04:05:38,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:38,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:38,015 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:38,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2949,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:38,215 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-06-05 04:05:38,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:38,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565496014] [2021-06-05 04:05:38,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:38,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:38,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565496014] [2021-06-05 04:05:38,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565496014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817638647] [2021-06-05 04:05:38,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:38,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:38,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817638647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:38,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:38,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356850731] [2021-06-05 04:05:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:38,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:38,318 INFO L87 Difference]: Start difference. First operand 4949 states and 14485 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:38,440 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-06-05 04:05:38,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:38,440 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:38,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:38,445 INFO L225 Difference]: With dead ends: 5274 [2021-06-05 04:05:38,445 INFO L226 Difference]: Without dead ends: 5270 [2021-06-05 04:05:38,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-06-05 04:05:38,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-06-05 04:05:38,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.926209677419355) internal successors, (14514), 4960 states have internal predecessors, (14514), 0 states have call successors, (0), 0 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 04:05:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-06-05 04:05:38,500 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-06-05 04:05:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:38,500 INFO L482 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-06-05 04:05:38,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-06-05 04:05:38,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:38,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:38,504 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:38,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2950 [2021-06-05 04:05:38,705 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:38,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:38,705 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-06-05 04:05:38,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:38,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475612268] [2021-06-05 04:05:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:38,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:38,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475612268] [2021-06-05 04:05:38,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475612268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301039707] [2021-06-05 04:05:38,751 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:38,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:38,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:38,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301039707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:38,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:38,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:38,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044028652] [2021-06-05 04:05:38,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:38,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:38,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:38,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:38,805 INFO L87 Difference]: Start difference. First operand 4961 states and 14514 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:38,888 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-06-05 04:05:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:38,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:38,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:38,894 INFO L225 Difference]: With dead ends: 5690 [2021-06-05 04:05:38,894 INFO L226 Difference]: Without dead ends: 5690 [2021-06-05 04:05:38,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 59.8ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-06-05 04:05:38,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-06-05 04:05:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 2.9253220611916264) internal successors, (14533), 4968 states have internal predecessors, (14533), 0 states have call successors, (0), 0 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 04:05:38,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-06-05 04:05:38,955 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-06-05 04:05:38,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:38,955 INFO L482 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-06-05 04:05:38,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-06-05 04:05:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:38,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:38,960 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:39,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2951 [2021-06-05 04:05:39,176 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:39,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-06-05 04:05:39,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:39,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337004291] [2021-06-05 04:05:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:39,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:39,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337004291] [2021-06-05 04:05:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337004291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:39,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708324752] [2021-06-05 04:05:39,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:39,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:39,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:39,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:39,286 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:39,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708324752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:39,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:39,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:05:39,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063565628] [2021-06-05 04:05:39,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:39,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:39,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:39,287 INFO L87 Difference]: Start difference. First operand 4969 states and 14533 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:39,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:39,382 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-06-05 04:05:39,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:39,382 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:39,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:39,387 INFO L225 Difference]: With dead ends: 5878 [2021-06-05 04:05:39,387 INFO L226 Difference]: Without dead ends: 5878 [2021-06-05 04:05:39,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:05:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-06-05 04:05:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-06-05 04:05:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4972 states have (on average 2.924979887369268) internal successors, (14543), 4972 states have internal predecessors, (14543), 0 states have call successors, (0), 0 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 04:05:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-06-05 04:05:39,446 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-06-05 04:05:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:39,446 INFO L482 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-06-05 04:05:39,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-06-05 04:05:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:39,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:39,451 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:39,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:39,651 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:39,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:39,651 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-06-05 04:05:39,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:39,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117621459] [2021-06-05 04:05:39,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:39,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:39,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117621459] [2021-06-05 04:05:39,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117621459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:39,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315762117] [2021-06-05 04:05:39,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:39,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:39,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315762117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:39,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:39,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:39,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824044160] [2021-06-05 04:05:39,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:39,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:39,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:39,772 INFO L87 Difference]: Start difference. First operand 4973 states and 14543 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:39,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:39,871 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-06-05 04:05:39,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:39,876 INFO L225 Difference]: With dead ends: 5765 [2021-06-05 04:05:39,876 INFO L226 Difference]: Without dead ends: 5765 [2021-06-05 04:05:39,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:39,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-06-05 04:05:39,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-06-05 04:05:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.9217161447742983) internal successors, (14369), 4918 states have internal predecessors, (14369), 0 states have call successors, (0), 0 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 04:05:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-06-05 04:05:39,943 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-06-05 04:05:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:39,943 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-06-05 04:05:39,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-06-05 04:05:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:39,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:39,947 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:40,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2953,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:40,148 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:40,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:40,148 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-06-05 04:05:40,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:40,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533418529] [2021-06-05 04:05:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:40,200 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:40,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533418529] [2021-06-05 04:05:40,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533418529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355451795] [2021-06-05 04:05:40,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:40,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:40,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:40,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355451795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:40,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:40,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550670186] [2021-06-05 04:05:40,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:40,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:40,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:40,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:40,269 INFO L87 Difference]: Start difference. First operand 4919 states and 14369 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:40,357 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-06-05 04:05:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:40,365 INFO L225 Difference]: With dead ends: 8014 [2021-06-05 04:05:40,365 INFO L226 Difference]: Without dead ends: 8014 [2021-06-05 04:05:40,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:05:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-06-05 04:05:40,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-06-05 04:05:40,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 2.966894817711971) internal successors, (21240), 7159 states have internal predecessors, (21240), 0 states have call successors, (0), 0 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 04:05:40,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-06-05 04:05:40,451 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-06-05 04:05:40,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:40,451 INFO L482 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-06-05 04:05:40,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:40,451 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-06-05 04:05:40,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:40,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:40,458 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:40,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2954 [2021-06-05 04:05:40,658 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-06-05 04:05:40,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:40,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695051676] [2021-06-05 04:05:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:40,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695051676] [2021-06-05 04:05:40,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695051676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678791942] [2021-06-05 04:05:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:40,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:40,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:40,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:40,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:40,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678791942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:40,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:40,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:40,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909370731] [2021-06-05 04:05:40,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:40,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:40,784 INFO L87 Difference]: Start difference. First operand 7160 states and 21240 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:40,915 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-06-05 04:05:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:40,923 INFO L225 Difference]: With dead ends: 8322 [2021-06-05 04:05:40,923 INFO L226 Difference]: Without dead ends: 8322 [2021-06-05 04:05:40,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:05:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-06-05 04:05:40,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-06-05 04:05:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 2.9642195295794727) internal successors, (20794), 7015 states have internal predecessors, (20794), 0 states have call successors, (0), 0 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 04:05:41,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-06-05 04:05:41,007 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-06-05 04:05:41,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:41,007 INFO L482 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-06-05 04:05:41,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:41,008 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-06-05 04:05:41,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:41,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:41,013 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:41,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2955,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:41,214 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:41,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-06-05 04:05:41,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:41,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500370541] [2021-06-05 04:05:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:41,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500370541] [2021-06-05 04:05:41,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500370541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:41,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739715046] [2021-06-05 04:05:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:41,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:05:41,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:41,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:41,345 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:41,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739715046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:41,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:41,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:41,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14222414] [2021-06-05 04:05:41,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:41,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:41,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:41,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:41,346 INFO L87 Difference]: Start difference. First operand 7016 states and 20794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:41,551 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-06-05 04:05:41,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:05:41,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:41,563 INFO L225 Difference]: With dead ends: 10804 [2021-06-05 04:05:41,563 INFO L226 Difference]: Without dead ends: 10804 [2021-06-05 04:05:41,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:05:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-06-05 04:05:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-06-05 04:05:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8930 states have (on average 3.0094064949608064) internal successors, (26874), 8930 states have internal predecessors, (26874), 0 states have call successors, (0), 0 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 04:05:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-06-05 04:05:41,676 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-06-05 04:05:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:41,676 INFO L482 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-06-05 04:05:41,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-06-05 04:05:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:41,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:41,683 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:41,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-06-05 04:05:41,883 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:41,883 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-06-05 04:05:41,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:41,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299246461] [2021-06-05 04:05:41,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:41,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:41,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299246461] [2021-06-05 04:05:41,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299246461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:41,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576925416] [2021-06-05 04:05:41,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:41,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:41,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:41,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:41,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:41,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576925416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:41,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:41,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:41,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161251785] [2021-06-05 04:05:41,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:41,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:41,999 INFO L87 Difference]: Start difference. First operand 8931 states and 26874 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:42,086 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-06-05 04:05:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:05:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:42,095 INFO L225 Difference]: With dead ends: 9250 [2021-06-05 04:05:42,095 INFO L226 Difference]: Without dead ends: 9249 [2021-06-05 04:05:42,095 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:05:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-06-05 04:05:42,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-06-05 04:05:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8667 states, 8666 states have (on average 3.0012693284098777) internal successors, (26009), 8666 states have internal predecessors, (26009), 0 states have call successors, (0), 0 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 04:05:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-06-05 04:05:42,199 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-06-05 04:05:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:42,199 INFO L482 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-06-05 04:05:42,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-06-05 04:05:42,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:42,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:42,206 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:42,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2957,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:42,407 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:42,407 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-06-05 04:05:42,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:42,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339733254] [2021-06-05 04:05:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:42,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339733254] [2021-06-05 04:05:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339733254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535691468] [2021-06-05 04:05:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:42,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:05:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:42,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:42,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535691468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:42,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:42,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:42,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046287208] [2021-06-05 04:05:42,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:42,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:42,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:42,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:42,531 INFO L87 Difference]: Start difference. First operand 8667 states and 26009 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:42,665 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-06-05 04:05:42,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:42,665 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:42,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:42,674 INFO L225 Difference]: With dead ends: 9868 [2021-06-05 04:05:42,674 INFO L226 Difference]: Without dead ends: 9868 [2021-06-05 04:05:42,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:05:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-06-05 04:05:42,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-06-05 04:05:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.9398744631648497) internal successors, (17798), 6054 states have internal predecessors, (17798), 0 states have call successors, (0), 0 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 04:05:42,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-06-05 04:05:42,758 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-06-05 04:05:42,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:42,758 INFO L482 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-06-05 04:05:42,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:42,758 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-06-05 04:05:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:42,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:42,762 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:42,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2958,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:42,963 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:42,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:42,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-06-05 04:05:42,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:42,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391530031] [2021-06-05 04:05:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:42,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:43,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391530031] [2021-06-05 04:05:43,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391530031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253580801] [2021-06-05 04:05:43,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:43,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:05:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253580801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697621392] [2021-06-05 04:05:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:43,092 INFO L87 Difference]: Start difference. First operand 6055 states and 17798 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:43,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:43,309 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-06-05 04:05:43,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:43,309 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:43,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:43,319 INFO L225 Difference]: With dead ends: 8378 [2021-06-05 04:05:43,320 INFO L226 Difference]: Without dead ends: 8378 [2021-06-05 04:05:43,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:05:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-06-05 04:05:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-06-05 04:05:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9371614301191764) internal successors, (13555), 4615 states have internal predecessors, (13555), 0 states have call successors, (0), 0 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 04:05:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-06-05 04:05:43,414 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-06-05 04:05:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:43,414 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-06-05 04:05:43,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-06-05 04:05:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:43,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:43,418 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:43,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2959,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:43,621 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:43,621 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-06-05 04:05:43,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:43,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513181587] [2021-06-05 04:05:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:43,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513181587] [2021-06-05 04:05:43,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513181587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:43,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142329518] [2021-06-05 04:05:43,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:43,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142329518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:43,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:43,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:43,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937392652] [2021-06-05 04:05:43,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:43,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:43,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:43,748 INFO L87 Difference]: Start difference. First operand 4616 states and 13555 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:43,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:43,935 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-06-05 04:05:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:43,941 INFO L225 Difference]: With dead ends: 7421 [2021-06-05 04:05:43,941 INFO L226 Difference]: Without dead ends: 7421 [2021-06-05 04:05:43,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:05:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-06-05 04:05:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-06-05 04:05:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 2.9543504901960786) internal successors, (19286), 6528 states have internal predecessors, (19286), 0 states have call successors, (0), 0 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 04:05:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-06-05 04:05:44,019 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-06-05 04:05:44,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:44,019 INFO L482 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-06-05 04:05:44,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:44,019 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-06-05 04:05:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:44,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:44,024 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:44,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2960 [2021-06-05 04:05:44,224 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:44,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:44,225 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-06-05 04:05:44,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:44,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597490930] [2021-06-05 04:05:44,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:44,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597490930] [2021-06-05 04:05:44,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597490930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:44,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088400222] [2021-06-05 04:05:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:44,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:44,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:44,321 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:44,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088400222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:44,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:44,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:44,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783747512] [2021-06-05 04:05:44,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:44,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:44,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:44,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:44,322 INFO L87 Difference]: Start difference. First operand 6529 states and 19286 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:44,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:44,446 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-06-05 04:05:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:44,446 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:44,452 INFO L225 Difference]: With dead ends: 6802 [2021-06-05 04:05:44,452 INFO L226 Difference]: Without dead ends: 6798 [2021-06-05 04:05:44,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-06-05 04:05:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-06-05 04:05:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.950592581191319) internal successors, (19170), 6497 states have internal predecessors, (19170), 0 states have call successors, (0), 0 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 04:05:44,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-06-05 04:05:44,531 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-06-05 04:05:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:44,532 INFO L482 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-06-05 04:05:44,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-06-05 04:05:44,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:44,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:44,537 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:44,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2961 [2021-06-05 04:05:44,737 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-06-05 04:05:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:44,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451081919] [2021-06-05 04:05:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:44,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:44,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451081919] [2021-06-05 04:05:44,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451081919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:44,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963363147] [2021-06-05 04:05:44,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:44,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:44,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:44,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963363147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:44,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:44,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:44,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300206879] [2021-06-05 04:05:44,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:44,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:44,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:44,842 INFO L87 Difference]: Start difference. First operand 6498 states and 19170 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:44,932 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-06-05 04:05:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:44,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:44,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:44,939 INFO L225 Difference]: With dead ends: 7322 [2021-06-05 04:05:44,939 INFO L226 Difference]: Without dead ends: 7322 [2021-06-05 04:05:44,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:05:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-06-05 04:05:45,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-06-05 04:05:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.950030750307503) internal successors, (19187), 6504 states have internal predecessors, (19187), 0 states have call successors, (0), 0 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 04:05:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-06-05 04:05:45,026 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-06-05 04:05:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:45,026 INFO L482 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-06-05 04:05:45,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-06-05 04:05:45,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:45,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:45,031 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:45,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2962 [2021-06-05 04:05:45,231 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:45,231 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-06-05 04:05:45,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:45,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463722846] [2021-06-05 04:05:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:45,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:45,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463722846] [2021-06-05 04:05:45,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463722846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:45,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003522319] [2021-06-05 04:05:45,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:45,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:45,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:45,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:45,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003522319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:45,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:45,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:45,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027159197] [2021-06-05 04:05:45,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:45,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:45,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:45,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:45,340 INFO L87 Difference]: Start difference. First operand 6505 states and 19187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:45,452 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-06-05 04:05:45,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:05:45,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:45,459 INFO L225 Difference]: With dead ends: 7657 [2021-06-05 04:05:45,460 INFO L226 Difference]: Without dead ends: 7657 [2021-06-05 04:05:45,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-06-05 04:05:45,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-06-05 04:05:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 2.94186972447842) internal successors, (18472), 6279 states have internal predecessors, (18472), 0 states have call successors, (0), 0 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 04:05:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-06-05 04:05:45,537 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-06-05 04:05:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:45,537 INFO L482 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-06-05 04:05:45,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-06-05 04:05:45,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:45,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:45,542 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:45,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2963 [2021-06-05 04:05:45,742 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-06-05 04:05:45,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:45,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807829213] [2021-06-05 04:05:45,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:45,792 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:45,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:45,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807829213] [2021-06-05 04:05:45,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807829213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:45,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779639416] [2021-06-05 04:05:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:45,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:05:45,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:45,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:45,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:45,851 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:45,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779639416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:45,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:45,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:45,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065308694] [2021-06-05 04:05:45,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:45,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:45,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:45,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:45,852 INFO L87 Difference]: Start difference. First operand 6280 states and 18472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:45,969 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-06-05 04:05:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:45,978 INFO L225 Difference]: With dead ends: 8774 [2021-06-05 04:05:45,978 INFO L226 Difference]: Without dead ends: 8774 [2021-06-05 04:05:45,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-06-05 04:05:46,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-06-05 04:05:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 2.9848465554565133) internal successors, (23440), 7853 states have internal predecessors, (23440), 0 states have call successors, (0), 0 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 04:05:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-06-05 04:05:46,079 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-06-05 04:05:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:46,079 INFO L482 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-06-05 04:05:46,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-06-05 04:05:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:46,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:46,087 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:46,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2964 [2021-06-05 04:05:46,293 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-06-05 04:05:46,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:46,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637873908] [2021-06-05 04:05:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:46,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:46,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637873908] [2021-06-05 04:05:46,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637873908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:46,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446629530] [2021-06-05 04:05:46,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:46,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:05:46,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:46,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:46,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446629530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:46,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:46,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:46,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068609979] [2021-06-05 04:05:46,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:46,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:46,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:46,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:46,410 INFO L87 Difference]: Start difference. First operand 7854 states and 23440 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:46,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:46,527 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-06-05 04:05:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:46,537 INFO L225 Difference]: With dead ends: 8525 [2021-06-05 04:05:46,537 INFO L226 Difference]: Without dead ends: 8525 [2021-06-05 04:05:46,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:46,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-06-05 04:05:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-06-05 04:05:46,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.9768447482215095) internal successors, (21341), 7169 states have internal predecessors, (21341), 0 states have call successors, (0), 0 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 04:05:46,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-06-05 04:05:46,628 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-06-05 04:05:46,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:46,628 INFO L482 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-06-05 04:05:46,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:46,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-06-05 04:05:46,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:46,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:46,634 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:46,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2965,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:46,835 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-06-05 04:05:46,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:46,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196395694] [2021-06-05 04:05:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:46,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196395694] [2021-06-05 04:05:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196395694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218474071] [2021-06-05 04:05:46,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:46,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:46,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:46,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218474071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:46,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:46,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:46,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540089650] [2021-06-05 04:05:46,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:46,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:46,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:46,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:46,953 INFO L87 Difference]: Start difference. First operand 7170 states and 21341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:47,052 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-06-05 04:05:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:47,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:47,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:47,062 INFO L225 Difference]: With dead ends: 10318 [2021-06-05 04:05:47,062 INFO L226 Difference]: Without dead ends: 10318 [2021-06-05 04:05:47,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-06-05 04:05:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-06-05 04:05:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 2.995475568067565) internal successors, (29793), 9946 states have internal predecessors, (29793), 0 states have call successors, (0), 0 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 04:05:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-06-05 04:05:47,194 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-06-05 04:05:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:47,194 INFO L482 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-06-05 04:05:47,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-06-05 04:05:47,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:47,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:47,202 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:47,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2966,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:47,403 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:47,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:47,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-06-05 04:05:47,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:47,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384034174] [2021-06-05 04:05:47,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:47,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:47,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384034174] [2021-06-05 04:05:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384034174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:47,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306598603] [2021-06-05 04:05:47,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:47,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:47,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:47,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:47,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306598603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:47,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:47,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:47,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535305095] [2021-06-05 04:05:47,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:47,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:47,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:47,532 INFO L87 Difference]: Start difference. First operand 9947 states and 29793 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:47,690 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-06-05 04:05:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:05:47,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:47,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:47,701 INFO L225 Difference]: With dead ends: 10463 [2021-06-05 04:05:47,701 INFO L226 Difference]: Without dead ends: 10463 [2021-06-05 04:05:47,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-06-05 04:05:47,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-06-05 04:05:47,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9768 states, 9767 states have (on average 2.995392648715061) internal successors, (29256), 9767 states have internal predecessors, (29256), 0 states have call successors, (0), 0 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 04:05:47,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-06-05 04:05:47,818 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-06-05 04:05:47,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:47,818 INFO L482 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-06-05 04:05:47,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:47,818 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-06-05 04:05:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:47,826 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:47,826 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2967,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:48,026 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-06-05 04:05:48,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369755064] [2021-06-05 04:05:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:48,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369755064] [2021-06-05 04:05:48,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369755064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418340862] [2021-06-05 04:05:48,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:48,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:48,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:48,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:48,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:48,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:48,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418340862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:48,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:48,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166604827] [2021-06-05 04:05:48,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:48,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:48,166 INFO L87 Difference]: Start difference. First operand 9768 states and 29256 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:48,411 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-06-05 04:05:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:05:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:48,425 INFO L225 Difference]: With dead ends: 11837 [2021-06-05 04:05:48,425 INFO L226 Difference]: Without dead ends: 11837 [2021-06-05 04:05:48,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:05:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-06-05 04:05:48,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-06-05 04:05:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.998826502978877) internal successors, (33221), 11078 states have internal predecessors, (33221), 0 states have call successors, (0), 0 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 04:05:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-06-05 04:05:48,564 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-06-05 04:05:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:48,564 INFO L482 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-06-05 04:05:48,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-06-05 04:05:48,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:48,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:48,572 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:48,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2968 [2021-06-05 04:05:48,781 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:48,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:48,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-06-05 04:05:48,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:48,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372672089] [2021-06-05 04:05:48,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:48,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372672089] [2021-06-05 04:05:48,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372672089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676611828] [2021-06-05 04:05:48,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:48,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:48,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:48,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:48,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676611828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:48,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:48,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:48,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701851411] [2021-06-05 04:05:48,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:48,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:48,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:48,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:48,896 INFO L87 Difference]: Start difference. First operand 11079 states and 33221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:49,106 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-06-05 04:05:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:05:49,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:49,118 INFO L225 Difference]: With dead ends: 11467 [2021-06-05 04:05:49,118 INFO L226 Difference]: Without dead ends: 11459 [2021-06-05 04:05:49,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 143.0ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:05:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-06-05 04:05:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-06-05 04:05:49,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11123 states, 11122 states have (on average 2.999550440568243) internal successors, (33361), 11122 states have internal predecessors, (33361), 0 states have call successors, (0), 0 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 04:05:49,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-06-05 04:05:49,252 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-06-05 04:05:49,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:49,252 INFO L482 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-06-05 04:05:49,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,253 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-06-05 04:05:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:49,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:49,261 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:49,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2969,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:49,465 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-06-05 04:05:49,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:49,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73607566] [2021-06-05 04:05:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:49,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:49,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73607566] [2021-06-05 04:05:49,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73607566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910763481] [2021-06-05 04:05:49,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:49,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:05:49,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:49,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910763481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:49,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:49,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:49,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502722613] [2021-06-05 04:05:49,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:49,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:49,592 INFO L87 Difference]: Start difference. First operand 11123 states and 33361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:49,785 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-06-05 04:05:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:49,786 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:49,801 INFO L225 Difference]: With dead ends: 14272 [2021-06-05 04:05:49,801 INFO L226 Difference]: Without dead ends: 14272 [2021-06-05 04:05:49,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:05:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-06-05 04:05:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-06-05 04:05:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8542 states, 8541 states have (on average 2.9779885259337315) internal successors, (25435), 8541 states have internal predecessors, (25435), 0 states have call successors, (0), 0 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 04:05:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-06-05 04:05:49,932 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-06-05 04:05:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:49,932 INFO L482 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-06-05 04:05:49,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-06-05 04:05:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:49,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:49,940 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:50,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2970 [2021-06-05 04:05:50,143 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-06-05 04:05:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:50,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239448485] [2021-06-05 04:05:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:50,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239448485] [2021-06-05 04:05:50,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239448485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867170325] [2021-06-05 04:05:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:05:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:50,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:50,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867170325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:50,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:50,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655316594] [2021-06-05 04:05:50,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:50,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:50,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:50,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:50,257 INFO L87 Difference]: Start difference. First operand 8542 states and 25435 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:50,380 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-06-05 04:05:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:50,389 INFO L225 Difference]: With dead ends: 9541 [2021-06-05 04:05:50,389 INFO L226 Difference]: Without dead ends: 9541 [2021-06-05 04:05:50,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 96.7ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:50,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-06-05 04:05:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-06-05 04:05:50,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 2.976833082358392) internal successors, (25699), 8633 states have internal predecessors, (25699), 0 states have call successors, (0), 0 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 04:05:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-06-05 04:05:50,517 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-06-05 04:05:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:50,517 INFO L482 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-06-05 04:05:50,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-06-05 04:05:50,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:50,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:50,524 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:50,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2971,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,724 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:50,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:50,725 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-06-05 04:05:50,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:50,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114111671] [2021-06-05 04:05:50,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:50,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:50,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114111671] [2021-06-05 04:05:50,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114111671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671271789] [2021-06-05 04:05:50,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:50,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671271789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:50,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:50,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:50,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67108710] [2021-06-05 04:05:50,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:50,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:50,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:50,841 INFO L87 Difference]: Start difference. First operand 8634 states and 25699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:50,960 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-06-05 04:05:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:05:50,960 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:50,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:50,968 INFO L225 Difference]: With dead ends: 9330 [2021-06-05 04:05:50,969 INFO L226 Difference]: Without dead ends: 9330 [2021-06-05 04:05:50,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-06-05 04:05:51,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-06-05 04:05:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 2.9630232214169503) internal successors, (20033), 6761 states have internal predecessors, (20033), 0 states have call successors, (0), 0 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 04:05:51,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-06-05 04:05:51,053 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-06-05 04:05:51,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:51,053 INFO L482 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-06-05 04:05:51,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:51,053 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-06-05 04:05:51,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:51,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:51,058 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:51,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2972 [2021-06-05 04:05:51,258 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:51,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-06-05 04:05:51,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:51,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570455153] [2021-06-05 04:05:51,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:51,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570455153] [2021-06-05 04:05:51,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570455153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747718319] [2021-06-05 04:05:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:51,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:51,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:51,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:51,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747718319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:51,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:05:51,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788718894] [2021-06-05 04:05:51,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:51,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:51,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:51,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:51,377 INFO L87 Difference]: Start difference. First operand 6762 states and 20033 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:51,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:51,473 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-06-05 04:05:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:05:51,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:51,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:51,481 INFO L225 Difference]: With dead ends: 8299 [2021-06-05 04:05:51,481 INFO L226 Difference]: Without dead ends: 8299 [2021-06-05 04:05:51,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:51,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-06-05 04:05:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-06-05 04:05:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7675 states have (on average 2.9603908794788274) internal successors, (22721), 7675 states have internal predecessors, (22721), 0 states have call successors, (0), 0 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 04:05:51,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-06-05 04:05:51,570 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-06-05 04:05:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:51,570 INFO L482 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-06-05 04:05:51,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-06-05 04:05:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:51,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:51,576 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:51,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2973,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:51,777 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:51,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:51,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-06-05 04:05:51,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:51,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934388108] [2021-06-05 04:05:51,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:51,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:51,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934388108] [2021-06-05 04:05:51,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934388108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631701830] [2021-06-05 04:05:51,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:51,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:51,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:51,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:51,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:51,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631701830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:51,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:51,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:51,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261687358] [2021-06-05 04:05:51,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:51,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:51,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:51,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:51,904 INFO L87 Difference]: Start difference. First operand 7676 states and 22721 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:52,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:52,062 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-06-05 04:05:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:05:52,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:52,071 INFO L225 Difference]: With dead ends: 8482 [2021-06-05 04:05:52,071 INFO L226 Difference]: Without dead ends: 8482 [2021-06-05 04:05:52,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:52,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-06-05 04:05:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-06-05 04:05:52,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.9541583877377233) internal successors, (20815), 7046 states have internal predecessors, (20815), 0 states have call successors, (0), 0 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 04:05:52,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-06-05 04:05:52,152 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-06-05 04:05:52,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:52,152 INFO L482 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-06-05 04:05:52,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:52,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-06-05 04:05:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:52,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:52,157 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:52,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2974 [2021-06-05 04:05:52,357 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:52,358 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-06-05 04:05:52,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:52,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757279873] [2021-06-05 04:05:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:52,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:52,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757279873] [2021-06-05 04:05:52,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757279873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273575657] [2021-06-05 04:05:52,427 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:52,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:52,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:52,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:52,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273575657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:52,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:52,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:05:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329893173] [2021-06-05 04:05:52,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:52,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:52,486 INFO L87 Difference]: Start difference. First operand 7047 states and 20815 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:52,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:52,720 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-06-05 04:05:52,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:05:52,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:52,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:52,728 INFO L225 Difference]: With dead ends: 8517 [2021-06-05 04:05:52,728 INFO L226 Difference]: Without dead ends: 8517 [2021-06-05 04:05:52,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:05:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-06-05 04:05:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-06-05 04:05:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.9705321800322535) internal successors, (20262), 6821 states have internal predecessors, (20262), 0 states have call successors, (0), 0 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 04:05:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-06-05 04:05:52,810 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-06-05 04:05:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:52,811 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-06-05 04:05:52,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-06-05 04:05:52,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:52,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:52,815 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:53,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2975 [2021-06-05 04:05:53,016 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:53,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:53,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-06-05 04:05:53,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:53,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247255169] [2021-06-05 04:05:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:53,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:53,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:53,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247255169] [2021-06-05 04:05:53,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247255169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203396091] [2021-06-05 04:05:53,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:53,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:05:53,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:53,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:53,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203396091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:53,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:05:53,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697831208] [2021-06-05 04:05:53,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:53,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:53,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:53,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:53,119 INFO L87 Difference]: Start difference. First operand 6822 states and 20262 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:53,277 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-06-05 04:05:53,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:53,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:53,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:53,284 INFO L225 Difference]: With dead ends: 7102 [2021-06-05 04:05:53,284 INFO L226 Difference]: Without dead ends: 7096 [2021-06-05 04:05:53,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:05:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-06-05 04:05:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-06-05 04:05:53,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.958930998037143) internal successors, (19597), 6623 states have internal predecessors, (19597), 0 states have call successors, (0), 0 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 04:05:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-06-05 04:05:53,366 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-06-05 04:05:53,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,366 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-06-05 04:05:53,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,366 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-06-05 04:05:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:53,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:53,371 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:53,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2976,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:53,571 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-06-05 04:05:53,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:53,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810673352] [2021-06-05 04:05:53,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:53,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:53,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810673352] [2021-06-05 04:05:53,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810673352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004860694] [2021-06-05 04:05:53,631 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:53,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:05:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:53,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004860694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:53,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:53,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:53,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558204952] [2021-06-05 04:05:53,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:53,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:53,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:53,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:53,695 INFO L87 Difference]: Start difference. First operand 6624 states and 19597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:53,784 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-06-05 04:05:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:05:53,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:53,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:53,790 INFO L225 Difference]: With dead ends: 6797 [2021-06-05 04:05:53,791 INFO L226 Difference]: Without dead ends: 6795 [2021-06-05 04:05:53,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:05:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-06-05 04:05:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-06-05 04:05:53,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 2.953313488955037) internal successors, (18851), 6383 states have internal predecessors, (18851), 0 states have call successors, (0), 0 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 04:05:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-06-05 04:05:53,891 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-06-05 04:05:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:53,891 INFO L482 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-06-05 04:05:53,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-06-05 04:05:53,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:53,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:53,895 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:54,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2977 [2021-06-05 04:05:54,096 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-06-05 04:05:54,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:54,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480921108] [2021-06-05 04:05:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:54,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480921108] [2021-06-05 04:05:54,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480921108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557323946] [2021-06-05 04:05:54,162 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:54,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557323946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:54,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:05:54,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689921911] [2021-06-05 04:05:54,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:05:54,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:54,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:05:54,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:54,226 INFO L87 Difference]: Start difference. First operand 6384 states and 18851 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:54,369 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-06-05 04:05:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:54,369 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:54,375 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 04:05:54,375 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 04:05:54,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:05:54,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 04:05:54,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-06-05 04:05:54,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.943986254295533) internal successors, (17134), 5820 states have internal predecessors, (17134), 0 states have call successors, (0), 0 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 04:05:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-06-05 04:05:54,441 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-06-05 04:05:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:54,441 INFO L482 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-06-05 04:05:54,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-06-05 04:05:54,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:54,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:54,446 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:54,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2978,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:54,646 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:54,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-06-05 04:05:54,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:54,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82370760] [2021-06-05 04:05:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:54,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82370760] [2021-06-05 04:05:54,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82370760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987827267] [2021-06-05 04:05:54,717 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:54,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:54,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:54,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987827267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:54,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:54,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:05:54,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595311738] [2021-06-05 04:05:54,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:05:54,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:54,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:05:54,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:54,783 INFO L87 Difference]: Start difference. First operand 5821 states and 17134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:55,029 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-06-05 04:05:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:05:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:55,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:55,035 INFO L225 Difference]: With dead ends: 6844 [2021-06-05 04:05:55,035 INFO L226 Difference]: Without dead ends: 6844 [2021-06-05 04:05:55,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:05:55,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-06-05 04:05:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-06-05 04:05:55,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.957582184517497) internal successors, (16734), 5658 states have internal predecessors, (16734), 0 states have call successors, (0), 0 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 04:05:55,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-06-05 04:05:55,097 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-06-05 04:05:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:55,097 INFO L482 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-06-05 04:05:55,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-06-05 04:05:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:55,101 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:55,101 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:55,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2979 [2021-06-05 04:05:55,302 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:55,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:55,302 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-06-05 04:05:55,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:55,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535931118] [2021-06-05 04:05:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535931118] [2021-06-05 04:05:55,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535931118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227768464] [2021-06-05 04:05:55,345 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:55,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:55,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:55,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:55,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227768464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:55,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:55,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117378748] [2021-06-05 04:05:55,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:55,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:55,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:55,401 INFO L87 Difference]: Start difference. First operand 5659 states and 16734 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:55,529 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-06-05 04:05:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:55,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:55,535 INFO L225 Difference]: With dead ends: 5851 [2021-06-05 04:05:55,535 INFO L226 Difference]: Without dead ends: 5847 [2021-06-05 04:05:55,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:05:55,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-06-05 04:05:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-06-05 04:05:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5651 states have (on average 2.956290921960715) internal successors, (16706), 5651 states have internal predecessors, (16706), 0 states have call successors, (0), 0 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 04:05:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-06-05 04:05:55,598 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-06-05 04:05:55,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:55,598 INFO L482 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-06-05 04:05:55,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-06-05 04:05:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:55,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:55,602 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:55,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2980 [2021-06-05 04:05:55,802 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:55,803 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-06-05 04:05:55,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:55,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306867920] [2021-06-05 04:05:55,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:55,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306867920] [2021-06-05 04:05:55,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306867920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712538310] [2021-06-05 04:05:55,875 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:55,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:55,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:55,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:55,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:55,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712538310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:55,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:55,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:05:55,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684844665] [2021-06-05 04:05:55,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:05:55,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:05:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:05:55,940 INFO L87 Difference]: Start difference. First operand 5652 states and 16706 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:56,164 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-06-05 04:05:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:05:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:56,170 INFO L225 Difference]: With dead ends: 7203 [2021-06-05 04:05:56,170 INFO L226 Difference]: Without dead ends: 7203 [2021-06-05 04:05:56,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:05:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-06-05 04:05:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-06-05 04:05:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.953042427902763) internal successors, (19558), 6623 states have internal predecessors, (19558), 0 states have call successors, (0), 0 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 04:05:56,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-06-05 04:05:56,244 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-06-05 04:05:56,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:56,245 INFO L482 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-06-05 04:05:56,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-06-05 04:05:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:56,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:56,249 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:56,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2981,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:56,450 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:56,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:56,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-06-05 04:05:56,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:56,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999277958] [2021-06-05 04:05:56,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:56,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999277958] [2021-06-05 04:05:56,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999277958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576231348] [2021-06-05 04:05:56,496 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:56,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:05:56,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:56,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:56,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:56,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576231348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:56,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:56,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:56,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255509951] [2021-06-05 04:05:56,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:56,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:56,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:56,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:56,554 INFO L87 Difference]: Start difference. First operand 6624 states and 19558 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:56,687 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-06-05 04:05:56,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:05:56,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:56,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:56,693 INFO L225 Difference]: With dead ends: 6862 [2021-06-05 04:05:56,693 INFO L226 Difference]: Without dead ends: 6858 [2021-06-05 04:05:56,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:05:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-06-05 04:05:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-06-05 04:05:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.9532921500678015) internal successors, (19601), 6637 states have internal predecessors, (19601), 0 states have call successors, (0), 0 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 04:05:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-06-05 04:05:56,770 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-06-05 04:05:56,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:56,770 INFO L482 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-06-05 04:05:56,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:56,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-06-05 04:05:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:56,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:56,774 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:56,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2982 [2021-06-05 04:05:56,975 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:56,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:56,975 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-06-05 04:05:56,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:56,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300718102] [2021-06-05 04:05:56,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300718102] [2021-06-05 04:05:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300718102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576459081] [2021-06-05 04:05:57,021 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:57,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:05:57,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:57,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:57,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:57,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576459081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:57,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:05:57,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676767391] [2021-06-05 04:05:57,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:05:57,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:05:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:05:57,081 INFO L87 Difference]: Start difference. First operand 6638 states and 19601 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:57,172 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-06-05 04:05:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:05:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:57,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:57,179 INFO L225 Difference]: With dead ends: 7175 [2021-06-05 04:05:57,180 INFO L226 Difference]: Without dead ends: 7175 [2021-06-05 04:05:57,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:05:57,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-06-05 04:05:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-06-05 04:05:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9528472431455257) internal successors, (19601), 6638 states have internal predecessors, (19601), 0 states have call successors, (0), 0 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 04:05:57,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-06-05 04:05:57,262 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-06-05 04:05:57,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:57,262 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-06-05 04:05:57,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-06-05 04:05:57,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:57,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:57,266 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:57,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2983,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:57,467 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:57,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:57,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-06-05 04:05:57,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:57,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375778880] [2021-06-05 04:05:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,514 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:57,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:57,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375778880] [2021-06-05 04:05:57,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375778880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47305877] [2021-06-05 04:05:57,515 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:57,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:57,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:57,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47305877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:57,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:57,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-06-05 04:05:57,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42129228] [2021-06-05 04:05:57,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:05:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:05:57,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:05:57,577 INFO L87 Difference]: Start difference. First operand 6639 states and 19601 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:57,700 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-06-05 04:05:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:05:57,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:57,706 INFO L225 Difference]: With dead ends: 7416 [2021-06-05 04:05:57,706 INFO L226 Difference]: Without dead ends: 7416 [2021-06-05 04:05:57,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:57,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-06-05 04:05:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-06-05 04:05:57,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9526965953600484) internal successors, (19600), 6638 states have internal predecessors, (19600), 0 states have call successors, (0), 0 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 04:05:57,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-06-05 04:05:57,797 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-06-05 04:05:57,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:57,798 INFO L482 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-06-05 04:05:57,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:57,798 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-06-05 04:05:57,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:57,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:57,802 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:58,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2984 [2021-06-05 04:05:58,003 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-06-05 04:05:58,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:58,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331325765] [2021-06-05 04:05:58,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:58,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331325765] [2021-06-05 04:05:58,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331325765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811496288] [2021-06-05 04:05:58,054 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:58,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:05:58,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:58,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:58,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:58,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811496288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:58,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:58,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644161476] [2021-06-05 04:05:58,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:58,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:58,117 INFO L87 Difference]: Start difference. First operand 6639 states and 19600 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:58,263 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-06-05 04:05:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:05:58,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:58,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:58,270 INFO L225 Difference]: With dead ends: 7505 [2021-06-05 04:05:58,270 INFO L226 Difference]: Without dead ends: 7505 [2021-06-05 04:05:58,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:58,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-06-05 04:05:58,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-06-05 04:05:58,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6648 states, 6647 states have (on average 2.9527606438995035) internal successors, (19627), 6647 states have internal predecessors, (19627), 0 states have call successors, (0), 0 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 04:05:58,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-06-05 04:05:58,346 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-06-05 04:05:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:58,346 INFO L482 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-06-05 04:05:58,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-06-05 04:05:58,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:58,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:58,350 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:58,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2985,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:58,551 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:58,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-06-05 04:05:58,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:58,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104703846] [2021-06-05 04:05:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:58,610 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:58,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104703846] [2021-06-05 04:05:58,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104703846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67504563] [2021-06-05 04:05:58,611 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:58,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:05:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:58,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:58,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67504563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:58,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:58,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-06-05 04:05:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933579487] [2021-06-05 04:05:58,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:05:58,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:58,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:05:58,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:05:58,676 INFO L87 Difference]: Start difference. First operand 6648 states and 19627 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:58,824 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-06-05 04:05:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:05:58,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:58,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:58,833 INFO L225 Difference]: With dead ends: 8295 [2021-06-05 04:05:58,834 INFO L226 Difference]: Without dead ends: 8295 [2021-06-05 04:05:58,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:05:58,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-06-05 04:05:58,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-06-05 04:05:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 2.966193822086703) internal successors, (22374), 7543 states have internal predecessors, (22374), 0 states have call successors, (0), 0 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 04:05:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-06-05 04:05:58,918 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-06-05 04:05:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:58,918 INFO L482 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-06-05 04:05:58,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-06-05 04:05:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:58,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:58,924 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:59,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2986,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,124 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-06-05 04:05:59,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:59,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484133721] [2021-06-05 04:05:59,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484133721] [2021-06-05 04:05:59,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484133721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204783337] [2021-06-05 04:05:59,185 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:05:59,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:59,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:59,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:59,249 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:05:59,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204783337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:59,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044734971] [2021-06-05 04:05:59,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:59,249 INFO L87 Difference]: Start difference. First operand 7544 states and 22374 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:59,383 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-06-05 04:05:59,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:05:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:59,390 INFO L225 Difference]: With dead ends: 8145 [2021-06-05 04:05:59,391 INFO L226 Difference]: Without dead ends: 8145 [2021-06-05 04:05:59,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:05:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-06-05 04:05:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-06-05 04:05:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.9648724455723254) internal successors, (22198), 7487 states have internal predecessors, (22198), 0 states have call successors, (0), 0 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 04:05:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-06-05 04:05:59,474 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-06-05 04:05:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:05:59,474 INFO L482 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-06-05 04:05:59,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-06-05 04:05:59,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:05:59,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:05:59,479 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:05:59,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2987 [2021-06-05 04:05:59,679 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:05:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:05:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-06-05 04:05:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:05:59,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771572879] [2021-06-05 04:05:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:05:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:05:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:59,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:05:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771572879] [2021-06-05 04:05:59,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771572879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816298804] [2021-06-05 04:05:59,743 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:05:59,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:05:59,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:05:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:05:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:05:59,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:05:59,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816298804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:05:59,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:05:59,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:05:59,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024719144] [2021-06-05 04:05:59,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:05:59,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:05:59,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:05:59,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:05:59,808 INFO L87 Difference]: Start difference. First operand 7488 states and 22198 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:05:59,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:05:59,931 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-06-05 04:05:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:05:59,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:05:59,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:05:59,940 INFO L225 Difference]: With dead ends: 9477 [2021-06-05 04:05:59,940 INFO L226 Difference]: Without dead ends: 9477 [2021-06-05 04:05:59,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:05:59,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-06-05 04:06:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-06-05 04:06:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9705618983657938) internal successors, (26539), 8934 states have internal predecessors, (26539), 0 states have call successors, (0), 0 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 04:06:00,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-06-05 04:06:00,040 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-06-05 04:06:00,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:00,041 INFO L482 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-06-05 04:06:00,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,041 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-06-05 04:06:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:00,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:00,047 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:00,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2988,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:00,248 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:00,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:00,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-06-05 04:06:00,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:00,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071974845] [2021-06-05 04:06:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:00,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:00,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071974845] [2021-06-05 04:06:00,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071974845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162235204] [2021-06-05 04:06:00,325 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:00,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162235204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:00,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:06:00,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098554319] [2021-06-05 04:06:00,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:00,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:00,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:00,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:00,392 INFO L87 Difference]: Start difference. First operand 8935 states and 26539 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:00,590 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-06-05 04:06:00,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:06:00,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:00,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:00,599 INFO L225 Difference]: With dead ends: 9543 [2021-06-05 04:06:00,599 INFO L226 Difference]: Without dead ends: 9543 [2021-06-05 04:06:00,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 170.4ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:06:00,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-06-05 04:06:00,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-06-05 04:06:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.9704267951159404) internal successors, (26517), 8927 states have internal predecessors, (26517), 0 states have call successors, (0), 0 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 04:06:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-06-05 04:06:00,697 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-06-05 04:06:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:00,697 INFO L482 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-06-05 04:06:00,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-06-05 04:06:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:00,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:00,703 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:00,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2989 [2021-06-05 04:06:00,904 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-06-05 04:06:00,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:00,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068442105] [2021-06-05 04:06:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:00,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068442105] [2021-06-05 04:06:00,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068442105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:00,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276378432] [2021-06-05 04:06:00,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:01,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276378432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:01,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:06:01,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930485666] [2021-06-05 04:06:01,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:01,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:01,053 INFO L87 Difference]: Start difference. First operand 8928 states and 26517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:01,335 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-06-05 04:06:01,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:06:01,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:01,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:01,345 INFO L225 Difference]: With dead ends: 10324 [2021-06-05 04:06:01,345 INFO L226 Difference]: Without dead ends: 10324 [2021-06-05 04:06:01,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:06:01,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-06-05 04:06:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-06-05 04:06:01,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 2.9726084249844367) internal successors, (28650), 9638 states have internal predecessors, (28650), 0 states have call successors, (0), 0 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 04:06:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-06-05 04:06:01,476 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-06-05 04:06:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:01,476 INFO L482 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-06-05 04:06:01,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:01,476 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-06-05 04:06:01,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:01,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:01,484 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:01,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2990,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:01,685 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-06-05 04:06:01,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:01,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323795148] [2021-06-05 04:06:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:01,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323795148] [2021-06-05 04:06:01,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323795148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900055899] [2021-06-05 04:06:01,766 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:01,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:01,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:01,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:01,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900055899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:01,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:01,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:06:01,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715375557] [2021-06-05 04:06:01,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:01,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:01,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:01,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:01,825 INFO L87 Difference]: Start difference. First operand 9639 states and 28650 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:02,076 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-06-05 04:06:02,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:06:02,076 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:02,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:02,085 INFO L225 Difference]: With dead ends: 9988 [2021-06-05 04:06:02,085 INFO L226 Difference]: Without dead ends: 9980 [2021-06-05 04:06:02,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:06:02,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-06-05 04:06:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-06-05 04:06:02,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9695452649144762) internal successors, (28472), 9588 states have internal predecessors, (28472), 0 states have call successors, (0), 0 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 04:06:02,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-06-05 04:06:02,206 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-06-05 04:06:02,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:02,206 INFO L482 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-06-05 04:06:02,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,206 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-06-05 04:06:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:02,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:02,214 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:02,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2991 [2021-06-05 04:06:02,414 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:02,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:02,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-06-05 04:06:02,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:02,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587337922] [2021-06-05 04:06:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587337922] [2021-06-05 04:06:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587337922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035601294] [2021-06-05 04:06:02,497 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:02,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:06:02,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:02,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:02,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035601294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:02,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:02,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:06:02,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836916306] [2021-06-05 04:06:02,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:02,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:02,570 INFO L87 Difference]: Start difference. First operand 9589 states and 28472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:02,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:02,912 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-06-05 04:06:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:06:02,912 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:02,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:02,923 INFO L225 Difference]: With dead ends: 11995 [2021-06-05 04:06:02,924 INFO L226 Difference]: Without dead ends: 11995 [2021-06-05 04:06:02,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 303.5ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:06:02,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-06-05 04:06:03,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-06-05 04:06:03,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 2.9680976340862864) internal successors, (27725), 9341 states have internal predecessors, (27725), 0 states have call successors, (0), 0 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 04:06:03,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-06-05 04:06:03,046 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-06-05 04:06:03,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:03,046 INFO L482 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-06-05 04:06:03,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,046 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-06-05 04:06:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:03,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:03,053 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:03,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2992 [2021-06-05 04:06:03,253 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:03,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:03,254 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-06-05 04:06:03,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:03,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302733213] [2021-06-05 04:06:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:03,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:03,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:03,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302733213] [2021-06-05 04:06:03,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302733213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259404979] [2021-06-05 04:06:03,316 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:03,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:03,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:03,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259404979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:03,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:03,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-06-05 04:06:03,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821848926] [2021-06-05 04:06:03,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:03,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:03,386 INFO L87 Difference]: Start difference. First operand 9342 states and 27725 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:03,619 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-06-05 04:06:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:06:03,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:03,629 INFO L225 Difference]: With dead ends: 9981 [2021-06-05 04:06:03,629 INFO L226 Difference]: Without dead ends: 9981 [2021-06-05 04:06:03,629 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:06:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-06-05 04:06:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-06-05 04:06:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9425 states, 9424 states have (on average 2.9691213921901527) internal successors, (27981), 9424 states have internal predecessors, (27981), 0 states have call successors, (0), 0 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 04:06:03,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-06-05 04:06:03,739 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-06-05 04:06:03,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:03,740 INFO L482 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-06-05 04:06:03,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:03,740 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-06-05 04:06:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:03,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:03,747 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:03,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2993 [2021-06-05 04:06:03,947 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:03,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:03,948 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-06-05 04:06:03,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:03,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146900420] [2021-06-05 04:06:03,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:04,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146900420] [2021-06-05 04:06:04,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146900420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304174795] [2021-06-05 04:06:04,020 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:04,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:04,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:04,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:04,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304174795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:04,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 04:06:04,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578233818] [2021-06-05 04:06:04,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:04,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:04,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:04,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:04,093 INFO L87 Difference]: Start difference. First operand 9425 states and 27981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:04,329 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-06-05 04:06:04,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:06:04,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:04,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:04,338 INFO L225 Difference]: With dead ends: 9826 [2021-06-05 04:06:04,338 INFO L226 Difference]: Without dead ends: 9826 [2021-06-05 04:06:04,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:06:04,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-06-05 04:06:04,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-06-05 04:06:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 2.963638475836431) internal successors, (25511), 8608 states have internal predecessors, (25511), 0 states have call successors, (0), 0 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 04:06:04,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-06-05 04:06:04,435 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-06-05 04:06:04,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:04,436 INFO L482 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-06-05 04:06:04,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:04,436 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-06-05 04:06:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:04,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:04,442 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:04,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2994 [2021-06-05 04:06:04,642 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:04,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-06-05 04:06:04,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:04,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77393647] [2021-06-05 04:06:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:04,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:04,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77393647] [2021-06-05 04:06:04,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77393647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543502058] [2021-06-05 04:06:04,712 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:04,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:04,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:04,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:04,786 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:04,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543502058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:04,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:04,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-06-05 04:06:04,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804552877] [2021-06-05 04:06:04,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:04,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:04,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:04,787 INFO L87 Difference]: Start difference. First operand 8609 states and 25511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:05,051 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-06-05 04:06:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:06:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:05,063 INFO L225 Difference]: With dead ends: 9527 [2021-06-05 04:06:05,063 INFO L226 Difference]: Without dead ends: 9527 [2021-06-05 04:06:05,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:06:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-06-05 04:06:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-06-05 04:06:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 2.9622662387960608) internal successors, (26770), 9037 states have internal predecessors, (26770), 0 states have call successors, (0), 0 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 04:06:05,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-06-05 04:06:05,170 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-06-05 04:06:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,170 INFO L482 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-06-05 04:06:05,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,171 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-06-05 04:06:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:05,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,177 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:05,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2995,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,378 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:05,378 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-06-05 04:06:05,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:05,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489356974] [2021-06-05 04:06:05,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489356974] [2021-06-05 04:06:05,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489356974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329691224] [2021-06-05 04:06:05,456 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:05,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:05,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329691224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:05,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:05,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:06:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572758713] [2021-06-05 04:06:05,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:05,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:05,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:05,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:05,532 INFO L87 Difference]: Start difference. First operand 9038 states and 26770 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:05,865 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-06-05 04:06:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:06:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:05,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:05,874 INFO L225 Difference]: With dead ends: 9636 [2021-06-05 04:06:05,874 INFO L226 Difference]: Without dead ends: 9636 [2021-06-05 04:06:05,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 293.3ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:06:05,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-06-05 04:06:05,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-06-05 04:06:05,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.9608266151924605) internal successors, (26076), 8807 states have internal predecessors, (26076), 0 states have call successors, (0), 0 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 04:06:05,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-06-05 04:06:05,973 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-06-05 04:06:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:05,973 INFO L482 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-06-05 04:06:05,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:05,973 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-06-05 04:06:05,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:05,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:05,979 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:06,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2996 [2021-06-05 04:06:06,180 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-06-05 04:06:06,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:06,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136526605] [2021-06-05 04:06:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:06,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136526605] [2021-06-05 04:06:06,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136526605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826949433] [2021-06-05 04:06:06,262 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:06,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:06,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:06,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:06,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:06,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826949433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:06,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:06,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:06:06,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589858639] [2021-06-05 04:06:06,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:06,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:06,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:06,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:06,338 INFO L87 Difference]: Start difference. First operand 8808 states and 26076 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:06,715 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-06-05 04:06:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:06:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:06,724 INFO L225 Difference]: With dead ends: 9760 [2021-06-05 04:06:06,725 INFO L226 Difference]: Without dead ends: 9760 [2021-06-05 04:06:06,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 04:06:06,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-06-05 04:06:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-06-05 04:06:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 2.9661723818350323) internal successors, (25604), 8632 states have internal predecessors, (25604), 0 states have call successors, (0), 0 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 04:06:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-06-05 04:06:06,822 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-06-05 04:06:06,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:06,822 INFO L482 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-06-05 04:06:06,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:06,822 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-06-05 04:06:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:06,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:06,828 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:07,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2997 [2021-06-05 04:06:07,029 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:07,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:07,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-06-05 04:06:07,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:07,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204423225] [2021-06-05 04:06:07,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:07,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204423225] [2021-06-05 04:06:07,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204423225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634776665] [2021-06-05 04:06:07,108 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:07,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:06:07,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:07,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:07,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634776665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:07,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-06-05 04:06:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898050216] [2021-06-05 04:06:07,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:07,179 INFO L87 Difference]: Start difference. First operand 8633 states and 25604 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:07,393 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-06-05 04:06:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:06:07,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:07,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:07,403 INFO L225 Difference]: With dead ends: 8906 [2021-06-05 04:06:07,403 INFO L226 Difference]: Without dead ends: 8900 [2021-06-05 04:06:07,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:06:07,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-05 04:06:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-06-05 04:06:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 2.9648899188876014) internal successors, (25587), 8630 states have internal predecessors, (25587), 0 states have call successors, (0), 0 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 04:06:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-06-05 04:06:07,521 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-06-05 04:06:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:07,522 INFO L482 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-06-05 04:06:07,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:07,522 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-06-05 04:06:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:07,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:07,528 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:07,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2998,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:07,729 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:07,729 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-06-05 04:06:07,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:07,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669648175] [2021-06-05 04:06:07,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:07,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:07,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669648175] [2021-06-05 04:06:07,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669648175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625214670] [2021-06-05 04:06:07,800 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:07,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:07,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:07,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625214670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:07,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:07,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-06-05 04:06:07,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705757735] [2021-06-05 04:06:07,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:07,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:07,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:07,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:07,878 INFO L87 Difference]: Start difference. First operand 8631 states and 25587 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:08,088 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-06-05 04:06:08,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:06:08,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:08,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:08,097 INFO L225 Difference]: With dead ends: 9990 [2021-06-05 04:06:08,097 INFO L226 Difference]: Without dead ends: 9990 [2021-06-05 04:06:08,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:06:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-06-05 04:06:08,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-06-05 04:06:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.9663589743589744) internal successors, (28922), 9750 states have internal predecessors, (28922), 0 states have call successors, (0), 0 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 04:06:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-06-05 04:06:08,208 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-06-05 04:06:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:08,208 INFO L482 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-06-05 04:06:08,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-06-05 04:06:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:08,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:08,215 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:08,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2999,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:08,415 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:08,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-06-05 04:06:08,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:08,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344600194] [2021-06-05 04:06:08,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:08,493 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:08,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344600194] [2021-06-05 04:06:08,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344600194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806950712] [2021-06-05 04:06:08,493 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:08,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:08,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:08,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:08,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:08,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806950712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:08,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:08,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 04:06:08,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51478634] [2021-06-05 04:06:08,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:06:08,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:08,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:06:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:08,574 INFO L87 Difference]: Start difference. First operand 9751 states and 28922 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:08,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:08,893 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-06-05 04:06:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:08,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:08,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:08,903 INFO L225 Difference]: With dead ends: 10086 [2021-06-05 04:06:08,903 INFO L226 Difference]: Without dead ends: 10086 [2021-06-05 04:06:08,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:06:08,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-06-05 04:06:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-06-05 04:06:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 2.966393442622951) internal successors, (28952), 9760 states have internal predecessors, (28952), 0 states have call successors, (0), 0 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 04:06:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-06-05 04:06:09,013 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-06-05 04:06:09,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:09,013 INFO L482 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-06-05 04:06:09,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-06-05 04:06:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:09,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:09,021 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:09,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3000,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:09,221 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:09,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-06-05 04:06:09,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:09,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539524514] [2021-06-05 04:06:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:09,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:09,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:09,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539524514] [2021-06-05 04:06:09,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539524514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079290847] [2021-06-05 04:06:09,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:09,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:09,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:09,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:09,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:09,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079290847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:09,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:09,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-06-05 04:06:09,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394729514] [2021-06-05 04:06:09,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:06:09,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:09,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:06:09,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:09,388 INFO L87 Difference]: Start difference. First operand 9761 states and 28952 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:09,749 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-06-05 04:06:09,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 04:06:09,749 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:09,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:09,760 INFO L225 Difference]: With dead ends: 11404 [2021-06-05 04:06:09,761 INFO L226 Difference]: Without dead ends: 11404 [2021-06-05 04:06:09,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 315.3ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:06:09,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-06-05 04:06:09,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-06-05 04:06:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9689181666357394) internal successors, (31999), 10778 states have internal predecessors, (31999), 0 states have call successors, (0), 0 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 04:06:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-06-05 04:06:09,883 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-06-05 04:06:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:09,883 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-06-05 04:06:09,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:09,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-06-05 04:06:09,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:09,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:09,891 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:10,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3001 [2021-06-05 04:06:10,091 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:10,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-06-05 04:06:10,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:10,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119687585] [2021-06-05 04:06:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119687585] [2021-06-05 04:06:10,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119687585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172453116] [2021-06-05 04:06:10,170 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:10,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172453116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:10,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-06-05 04:06:10,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608769587] [2021-06-05 04:06:10,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:10,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:10,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:10,230 INFO L87 Difference]: Start difference. First operand 10779 states and 31999 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:10,444 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-06-05 04:06:10,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:10,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:10,455 INFO L225 Difference]: With dead ends: 10976 [2021-06-05 04:06:10,455 INFO L226 Difference]: Without dead ends: 10972 [2021-06-05 04:06:10,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-06-05 04:06:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-06-05 04:06:10,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9686398218593433) internal successors, (31996), 10778 states have internal predecessors, (31996), 0 states have call successors, (0), 0 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 04:06:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-06-05 04:06:10,581 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-06-05 04:06:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:10,581 INFO L482 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-06-05 04:06:10,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-06-05 04:06:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:10,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:10,589 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:10,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3002,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:10,790 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:10,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:10,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-06-05 04:06:10,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:10,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567361422] [2021-06-05 04:06:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:10,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567361422] [2021-06-05 04:06:10,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567361422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641290105] [2021-06-05 04:06:10,874 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:10,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:10,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641290105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:10,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:10,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-06-05 04:06:10,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376036233] [2021-06-05 04:06:10,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:06:10,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:10,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:06:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:10,962 INFO L87 Difference]: Start difference. First operand 10779 states and 31996 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:11,273 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-06-05 04:06:11,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:06:11,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:11,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:11,287 INFO L225 Difference]: With dead ends: 13145 [2021-06-05 04:06:11,287 INFO L226 Difference]: Without dead ends: 13145 [2021-06-05 04:06:11,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 04:06:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-06-05 04:06:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-06-05 04:06:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12431 states, 12430 states have (on average 2.9723250201126308) internal successors, (36946), 12430 states have internal predecessors, (36946), 0 states have call successors, (0), 0 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 04:06:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-06-05 04:06:11,436 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-06-05 04:06:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:11,436 INFO L482 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-06-05 04:06:11,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-06-05 04:06:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:11,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:11,444 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:11,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3003,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:11,645 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:11,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:11,645 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-06-05 04:06:11,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:11,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118779957] [2021-06-05 04:06:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118779957] [2021-06-05 04:06:11,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118779957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100917074] [2021-06-05 04:06:11,734 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:11,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:06:11,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100917074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:11,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:11,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 04:06:11,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921731453] [2021-06-05 04:06:11,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:11,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:11,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:11,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:11,800 INFO L87 Difference]: Start difference. First operand 12431 states and 36946 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:11,998 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-06-05 04:06:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:06:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:12,013 INFO L225 Difference]: With dead ends: 12636 [2021-06-05 04:06:12,013 INFO L226 Difference]: Without dead ends: 12634 [2021-06-05 04:06:12,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:12,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-06-05 04:06:12,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-06-05 04:06:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.972690763052209) internal successors, (37010), 12450 states have internal predecessors, (37010), 0 states have call successors, (0), 0 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 04:06:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-06-05 04:06:12,184 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-06-05 04:06:12,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:12,184 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-06-05 04:06:12,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-06-05 04:06:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:12,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:12,193 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:12,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3004,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:12,394 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-06-05 04:06:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:12,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42557600] [2021-06-05 04:06:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:12,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:12,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42557600] [2021-06-05 04:06:12,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42557600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099496304] [2021-06-05 04:06:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:12,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:12,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:12,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:12,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:12,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099496304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:12,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:12,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-06-05 04:06:12,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291205648] [2021-06-05 04:06:12,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:12,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:12,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:12,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:12,541 INFO L87 Difference]: Start difference. First operand 12451 states and 37010 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:12,704 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-06-05 04:06:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:12,717 INFO L225 Difference]: With dead ends: 13016 [2021-06-05 04:06:12,717 INFO L226 Difference]: Without dead ends: 13016 [2021-06-05 04:06:12,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 155.6ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:12,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-06-05 04:06:12,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-06-05 04:06:12,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12452 states, 12451 states have (on average 2.9725323267207453) internal successors, (37011), 12451 states have internal predecessors, (37011), 0 states have call successors, (0), 0 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 04:06:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-06-05 04:06:12,866 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-06-05 04:06:12,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:12,866 INFO L482 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-06-05 04:06:12,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:12,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-06-05 04:06:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:12,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:12,875 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:13,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3005,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,075 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:13,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:13,076 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-06-05 04:06:13,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:13,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755534026] [2021-06-05 04:06:13,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:13,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755534026] [2021-06-05 04:06:13,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755534026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597057656] [2021-06-05 04:06:13,154 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:13,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:13,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597057656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:13,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 04:06:13,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745429646] [2021-06-05 04:06:13,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:13,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:13,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:13,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:13,234 INFO L87 Difference]: Start difference. First operand 12452 states and 37011 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:13,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:13,446 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-06-05 04:06:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:13,460 INFO L225 Difference]: With dead ends: 13404 [2021-06-05 04:06:13,460 INFO L226 Difference]: Without dead ends: 13404 [2021-06-05 04:06:13,460 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:06:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-06-05 04:06:13,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-06-05 04:06:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 12455 states have (on average 2.972380570052188) internal successors, (37021), 12455 states have internal predecessors, (37021), 0 states have call successors, (0), 0 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 04:06:13,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-06-05 04:06:13,611 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-06-05 04:06:13,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:13,611 INFO L482 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-06-05 04:06:13,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:13,611 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-06-05 04:06:13,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:13,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:13,620 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:13,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3006,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,820 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:13,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:13,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-06-05 04:06:13,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:13,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167833676] [2021-06-05 04:06:13,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:13,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:13,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167833676] [2021-06-05 04:06:13,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167833676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838758821] [2021-06-05 04:06:13,907 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:13,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:13,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:13,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:13,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838758821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:13,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:13,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-06-05 04:06:13,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709347630] [2021-06-05 04:06:13,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:13,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:13,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:13,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:13,983 INFO L87 Difference]: Start difference. First operand 12456 states and 37021 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:14,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:14,259 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-06-05 04:06:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:06:14,259 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:14,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:14,275 INFO L225 Difference]: With dead ends: 15061 [2021-06-05 04:06:14,275 INFO L226 Difference]: Without dead ends: 15061 [2021-06-05 04:06:14,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:06:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-06-05 04:06:14,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-06-05 04:06:14,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 2.9764123471170647) internal successors, (40884), 13736 states have internal predecessors, (40884), 0 states have call successors, (0), 0 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 04:06:14,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-06-05 04:06:14,450 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-06-05 04:06:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:14,450 INFO L482 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-06-05 04:06:14,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-06-05 04:06:14,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:14,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:14,460 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:14,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3007,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:14,660 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:14,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:14,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-06-05 04:06:14,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:14,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257065782] [2021-06-05 04:06:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:14,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257065782] [2021-06-05 04:06:14,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257065782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58508020] [2021-06-05 04:06:14,739 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:14,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:14,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:14,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58508020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:14,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:14,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 04:06:14,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482986941] [2021-06-05 04:06:14,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:06:14,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:06:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:14,825 INFO L87 Difference]: Start difference. First operand 13737 states and 40884 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:15,120 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-06-05 04:06:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:06:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:15,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:15,136 INFO L225 Difference]: With dead ends: 14989 [2021-06-05 04:06:15,136 INFO L226 Difference]: Without dead ends: 14989 [2021-06-05 04:06:15,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 273.5ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:06:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-06-05 04:06:15,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-06-05 04:06:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 2.9763773804332025) internal successors, (40949), 13758 states have internal predecessors, (40949), 0 states have call successors, (0), 0 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 04:06:15,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-06-05 04:06:15,339 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-06-05 04:06:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:15,339 INFO L482 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-06-05 04:06:15,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-06-05 04:06:15,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:15,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:15,348 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:15,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3008 [2021-06-05 04:06:15,549 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:15,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-06-05 04:06:15,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:15,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331548971] [2021-06-05 04:06:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:15,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:15,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331548971] [2021-06-05 04:06:15,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331548971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252765985] [2021-06-05 04:06:15,630 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:15,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:15,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:15,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252765985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:15,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:15,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-06-05 04:06:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716249804] [2021-06-05 04:06:15,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:06:15,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:06:15,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:06:15,712 INFO L87 Difference]: Start difference. First operand 13759 states and 40949 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:16,020 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-06-05 04:06:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:06:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:16,039 INFO L225 Difference]: With dead ends: 17231 [2021-06-05 04:06:16,039 INFO L226 Difference]: Without dead ends: 17231 [2021-06-05 04:06:16,039 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 270.5ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 04:06:16,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-06-05 04:06:16,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-06-05 04:06:16,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 16399 states have (on average 2.9804256357094947) internal successors, (48876), 16399 states have internal predecessors, (48876), 0 states have call successors, (0), 0 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 04:06:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-06-05 04:06:16,245 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-06-05 04:06:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:16,245 INFO L482 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-06-05 04:06:16,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-06-05 04:06:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:16,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:16,256 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:16,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3009 [2021-06-05 04:06:16,456 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:16,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-06-05 04:06:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:16,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075219412] [2021-06-05 04:06:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:16,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075219412] [2021-06-05 04:06:16,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075219412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888115143] [2021-06-05 04:06:16,543 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:16,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:16,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:16,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:16,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888115143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:16,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:16,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 04:06:16,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620926074] [2021-06-05 04:06:16,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:06:16,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:16,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:06:16,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:16,633 INFO L87 Difference]: Start difference. First operand 16400 states and 48876 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:16,911 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-06-05 04:06:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:16,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:16,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:16,933 INFO L225 Difference]: With dead ends: 17044 [2021-06-05 04:06:16,933 INFO L226 Difference]: Without dead ends: 17044 [2021-06-05 04:06:16,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:06:16,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-06-05 04:06:17,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-06-05 04:06:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16341 states, 16340 states have (on average 2.980232558139535) internal successors, (48697), 16340 states have internal predecessors, (48697), 0 states have call successors, (0), 0 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 04:06:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-06-05 04:06:17,139 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-06-05 04:06:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:17,140 INFO L482 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-06-05 04:06:17,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-06-05 04:06:17,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:17,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:17,151 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:17,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3010,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:17,351 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:17,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:17,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-06-05 04:06:17,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:17,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180189432] [2021-06-05 04:06:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:17,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180189432] [2021-06-05 04:06:17,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180189432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533835132] [2021-06-05 04:06:17,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:17,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:17,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:17,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533835132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:17,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-06-05 04:06:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854185706] [2021-06-05 04:06:17,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:06:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:06:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:17,524 INFO L87 Difference]: Start difference. First operand 16341 states and 48697 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:17,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:17,787 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-06-05 04:06:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:17,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:17,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:17,811 INFO L225 Difference]: With dead ends: 18181 [2021-06-05 04:06:17,811 INFO L226 Difference]: Without dead ends: 18181 [2021-06-05 04:06:17,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 04:06:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-06-05 04:06:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-06-05 04:06:18,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17671 states have (on average 2.982287363476883) internal successors, (52700), 17671 states have internal predecessors, (52700), 0 states have call successors, (0), 0 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 04:06:18,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-06-05 04:06:18,125 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-06-05 04:06:18,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:18,125 INFO L482 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-06-05 04:06:18,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-06-05 04:06:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:18,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:18,137 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:18,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 04:06:18,337 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-06-05 04:06:18,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:18,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354644638] [2021-06-05 04:06:18,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:18,424 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:18,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354644638] [2021-06-05 04:06:18,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354644638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:18,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636003017] [2021-06-05 04:06:18,425 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:18,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:18,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:18,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:18,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:18,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636003017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:18,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:18,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-06-05 04:06:18,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471215813] [2021-06-05 04:06:18,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:06:18,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:18,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:06:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:06:18,522 INFO L87 Difference]: Start difference. First operand 17672 states and 52700 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:18,812 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-06-05 04:06:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:06:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:18,835 INFO L225 Difference]: With dead ends: 18327 [2021-06-05 04:06:18,836 INFO L226 Difference]: Without dead ends: 18327 [2021-06-05 04:06:18,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:06:18,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-06-05 04:06:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-06-05 04:06:19,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 2.982240823482835) internal successors, (52729), 17681 states have internal predecessors, (52729), 0 states have call successors, (0), 0 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 04:06:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-06-05 04:06:19,069 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-06-05 04:06:19,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:19,069 INFO L482 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-06-05 04:06:19,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-06-05 04:06:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 04:06:19,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:19,082 INFO L521 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:19,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3012 [2021-06-05 04:06:19,283 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:19,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:19,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-06-05 04:06:19,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:19,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671237568] [2021-06-05 04:06:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:19,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:19,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671237568] [2021-06-05 04:06:19,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671237568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235517776] [2021-06-05 04:06:19,377 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:19,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:19,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:19,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:19,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235517776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:19,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:19,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-05 04:06:19,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367786839] [2021-06-05 04:06:19,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:06:19,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:19,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:06:19,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:19,480 INFO L87 Difference]: Start difference. First operand 17682 states and 52729 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:19,904 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-06-05 04:06:19,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 04:06:19,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 04:06:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:19,926 INFO L225 Difference]: With dead ends: 19601 [2021-06-05 04:06:19,926 INFO L226 Difference]: Without dead ends: 19601 [2021-06-05 04:06:19,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 04:06:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-06-05 04:06:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-06-05 04:06:20,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9824797089280715) internal successors, (53282), 17865 states have internal predecessors, (53282), 0 states have call successors, (0), 0 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 04:06:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-06-05 04:06:20,166 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-06-05 04:06:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:20,166 INFO L482 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-06-05 04:06:20,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-06-05 04:06:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:20,179 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:20,179 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:20,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3013,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:20,379 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:20,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:20,380 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-06-05 04:06:20,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:20,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263474448] [2021-06-05 04:06:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:20,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:20,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263474448] [2021-06-05 04:06:20,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263474448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:20,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752424304] [2021-06-05 04:06:20,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:20,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:20,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:20,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752424304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:20,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:20,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 04:06:20,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721599986] [2021-06-05 04:06:20,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:20,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:20,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:20,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:20,486 INFO L87 Difference]: Start difference. First operand 17866 states and 53282 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:20,664 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-06-05 04:06:20,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:20,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:20,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:20,685 INFO L225 Difference]: With dead ends: 18113 [2021-06-05 04:06:20,685 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 04:06:20,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 106.1ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 04:06:20,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-06-05 04:06:20,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17844 states, 17843 states have (on average 2.981393263464664) internal successors, (53197), 17843 states have internal predecessors, (53197), 0 states have call successors, (0), 0 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 04:06:20,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-06-05 04:06:20,992 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-06-05 04:06:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:20,993 INFO L482 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-06-05 04:06:20,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-06-05 04:06:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:21,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:21,006 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:21,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3014,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:21,206 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-06-05 04:06:21,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:21,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022233900] [2021-06-05 04:06:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:21,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:21,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022233900] [2021-06-05 04:06:21,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022233900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:21,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547682734] [2021-06-05 04:06:21,260 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:21,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:21,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:21,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:21,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547682734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:21,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:21,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:06:21,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794233722] [2021-06-05 04:06:21,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:21,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:21,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:21,320 INFO L87 Difference]: Start difference. First operand 17844 states and 53197 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:21,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:21,526 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-06-05 04:06:21,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:06:21,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:21,549 INFO L225 Difference]: With dead ends: 18088 [2021-06-05 04:06:21,549 INFO L226 Difference]: Without dead ends: 18082 [2021-06-05 04:06:21,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:06:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-06-05 04:06:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-06-05 04:06:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.980820995962315) internal successors, (53154), 17832 states have internal predecessors, (53154), 0 states have call successors, (0), 0 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 04:06:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-06-05 04:06:21,791 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-06-05 04:06:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:21,792 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-06-05 04:06:21,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:21,792 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-06-05 04:06:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:21,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:21,805 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:22,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3015,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:22,005 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:22,006 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-06-05 04:06:22,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:22,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479631795] [2021-06-05 04:06:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:22,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479631795] [2021-06-05 04:06:22,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479631795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:22,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241314764] [2021-06-05 04:06:22,071 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:22,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:06:22,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:22,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:22,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241314764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:22,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:22,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:06:22,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220538525] [2021-06-05 04:06:22,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:22,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:22,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:22,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:22,136 INFO L87 Difference]: Start difference. First operand 17833 states and 53154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:22,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:22,347 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-06-05 04:06:22,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:06:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:22,368 INFO L225 Difference]: With dead ends: 18081 [2021-06-05 04:06:22,369 INFO L226 Difference]: Without dead ends: 18075 [2021-06-05 04:06:22,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:06:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-06-05 04:06:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-06-05 04:06:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.9803723642889186) internal successors, (53146), 17832 states have internal predecessors, (53146), 0 states have call successors, (0), 0 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 04:06:22,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-06-05 04:06:22,624 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-06-05 04:06:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:22,624 INFO L482 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-06-05 04:06:22,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-06-05 04:06:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:22,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:22,638 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:22,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3016 [2021-06-05 04:06:22,838 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-06-05 04:06:22,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:22,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145678337] [2021-06-05 04:06:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:22,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145678337] [2021-06-05 04:06:22,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145678337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:22,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365656029] [2021-06-05 04:06:22,902 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:22,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:22,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:22,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:22,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365656029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:22,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:22,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 04:06:22,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754624826] [2021-06-05 04:06:22,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:22,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:22,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:22,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:22,963 INFO L87 Difference]: Start difference. First operand 17833 states and 53146 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:23,161 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-06-05 04:06:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:23,182 INFO L225 Difference]: With dead ends: 18366 [2021-06-05 04:06:23,183 INFO L226 Difference]: Without dead ends: 18358 [2021-06-05 04:06:23,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:06:23,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-06-05 04:06:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-06-05 04:06:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.98009978137788) internal successors, (53162), 17839 states have internal predecessors, (53162), 0 states have call successors, (0), 0 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 04:06:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-06-05 04:06:23,411 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-06-05 04:06:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:23,411 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-06-05 04:06:23,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:23,411 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-06-05 04:06:23,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:23,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:23,424 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:23,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3017,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:23,624 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:23,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:23,625 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-06-05 04:06:23,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:23,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523742851] [2021-06-05 04:06:23,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:23,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:23,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523742851] [2021-06-05 04:06:23,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523742851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:23,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247397550] [2021-06-05 04:06:23,692 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:23,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:06:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:23,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247397550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:23,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:23,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 04:06:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799556114] [2021-06-05 04:06:23,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:23,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:23,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:23,749 INFO L87 Difference]: Start difference. First operand 17840 states and 53162 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:23,981 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-06-05 04:06:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:23,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:24,004 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 04:06:24,004 INFO L226 Difference]: Without dead ends: 18058 [2021-06-05 04:06:24,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-06-05 04:06:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-06-05 04:06:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17835 states, 17834 states have (on average 2.9798138387350006) internal successors, (53142), 17834 states have internal predecessors, (53142), 0 states have call successors, (0), 0 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 04:06:24,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-06-05 04:06:24,233 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-06-05 04:06:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:24,233 INFO L482 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-06-05 04:06:24,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-06-05 04:06:24,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:24,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:24,246 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:24,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3018 [2021-06-05 04:06:24,446 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-06-05 04:06:24,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:24,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514136597] [2021-06-05 04:06:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:24,492 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:24,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:24,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514136597] [2021-06-05 04:06:24,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514136597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:24,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970726772] [2021-06-05 04:06:24,493 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:24,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:06:24,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:24,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:24,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970726772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:24,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:24,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:06:24,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14401913] [2021-06-05 04:06:24,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:24,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:24,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:24,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:24,556 INFO L87 Difference]: Start difference. First operand 17835 states and 53142 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:24,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:24,660 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-06-05 04:06:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:24,661 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:24,682 INFO L225 Difference]: With dead ends: 18191 [2021-06-05 04:06:24,682 INFO L226 Difference]: Without dead ends: 18189 [2021-06-05 04:06:24,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-06-05 04:06:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-06-05 04:06:24,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17847 states, 17846 states have (on average 2.979379132578729) internal successors, (53170), 17846 states have internal predecessors, (53170), 0 states have call successors, (0), 0 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 04:06:24,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-06-05 04:06:24,932 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-06-05 04:06:24,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:24,933 INFO L482 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-06-05 04:06:24,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:24,933 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-06-05 04:06:24,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:24,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:24,946 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:25,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3019,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:25,147 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:25,147 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-06-05 04:06:25,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:25,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411677604] [2021-06-05 04:06:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:25,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411677604] [2021-06-05 04:06:25,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411677604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:25,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098112359] [2021-06-05 04:06:25,193 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:25,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:25,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098112359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:25,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:25,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:06:25,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697732007] [2021-06-05 04:06:25,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:25,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:25,254 INFO L87 Difference]: Start difference. First operand 17847 states and 53170 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:25,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:25,388 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-06-05 04:06:25,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:25,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:25,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:25,409 INFO L225 Difference]: With dead ends: 18272 [2021-06-05 04:06:25,409 INFO L226 Difference]: Without dead ends: 18271 [2021-06-05 04:06:25,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:06:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-06-05 04:06:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-06-05 04:06:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.9784180727619263) internal successors, (53132), 17839 states have internal predecessors, (53132), 0 states have call successors, (0), 0 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 04:06:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-06-05 04:06:25,652 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-06-05 04:06:25,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:25,652 INFO L482 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-06-05 04:06:25,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-06-05 04:06:25,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:25,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:25,666 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:25,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3020 [2021-06-05 04:06:25,866 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-06-05 04:06:25,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:25,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753969040] [2021-06-05 04:06:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:25,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:25,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753969040] [2021-06-05 04:06:25,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753969040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:25,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869748446] [2021-06-05 04:06:25,918 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:25,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:25,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:25,973 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:25,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869748446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:25,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:25,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-06-05 04:06:25,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394204371] [2021-06-05 04:06:25,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:25,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:25,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:25,974 INFO L87 Difference]: Start difference. First operand 17840 states and 53132 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:26,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:26,156 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-06-05 04:06:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:26,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:26,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:26,178 INFO L225 Difference]: With dead ends: 18131 [2021-06-05 04:06:26,178 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 04:06:26,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:26,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 04:06:26,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-06-05 04:06:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.976946376486426) internal successors, (53073), 17828 states have internal predecessors, (53073), 0 states have call successors, (0), 0 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 04:06:26,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-06-05 04:06:26,462 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-06-05 04:06:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:26,462 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-06-05 04:06:26,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-06-05 04:06:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:26,476 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:26,476 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:26,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3021 [2021-06-05 04:06:26,676 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:26,677 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-06-05 04:06:26,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:26,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890168961] [2021-06-05 04:06:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:26,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:26,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890168961] [2021-06-05 04:06:26,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890168961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:26,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628384308] [2021-06-05 04:06:26,734 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:26,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:06:26,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:26,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:26,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:26,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628384308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:26,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:26,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:06:26,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455783985] [2021-06-05 04:06:26,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:26,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:26,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:26,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:26,792 INFO L87 Difference]: Start difference. First operand 17829 states and 53073 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:26,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:26,994 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-06-05 04:06:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:27,016 INFO L225 Difference]: With dead ends: 18120 [2021-06-05 04:06:27,016 INFO L226 Difference]: Without dead ends: 18110 [2021-06-05 04:06:27,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:27,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-06-05 04:06:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-06-05 04:06:27,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17809 states have (on average 2.9759110562075355) internal successors, (52998), 17809 states have internal predecessors, (52998), 0 states have call successors, (0), 0 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 04:06:27,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-06-05 04:06:27,261 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-06-05 04:06:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:27,261 INFO L482 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-06-05 04:06:27,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-06-05 04:06:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:27,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:27,275 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:27,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3022,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:27,475 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:27,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:27,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-06-05 04:06:27,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:27,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881596798] [2021-06-05 04:06:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:27,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:27,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881596798] [2021-06-05 04:06:27,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881596798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:27,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835655086] [2021-06-05 04:06:27,536 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:27,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835655086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:27,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:27,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 04:06:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388260392] [2021-06-05 04:06:27,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:27,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:27,591 INFO L87 Difference]: Start difference. First operand 17810 states and 52998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:27,756 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-06-05 04:06:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:06:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:27,778 INFO L225 Difference]: With dead ends: 18994 [2021-06-05 04:06:27,779 INFO L226 Difference]: Without dead ends: 18988 [2021-06-05 04:06:27,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-06-05 04:06:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-06-05 04:06:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.9754319048687456) internal successors, (53046), 17828 states have internal predecessors, (53046), 0 states have call successors, (0), 0 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 04:06:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-06-05 04:06:28,010 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-06-05 04:06:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:28,010 INFO L482 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-06-05 04:06:28,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:28,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-06-05 04:06:28,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:28,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:28,024 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:28,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3023 [2021-06-05 04:06:28,225 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-06-05 04:06:28,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:28,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187416445] [2021-06-05 04:06:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:28,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:28,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187416445] [2021-06-05 04:06:28,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187416445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:28,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260492182] [2021-06-05 04:06:28,295 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:28,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:06:28,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:28,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:28,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260492182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:28,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:28,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:28,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85837315] [2021-06-05 04:06:28,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:28,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:28,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:28,354 INFO L87 Difference]: Start difference. First operand 17829 states and 53046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:28,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:28,534 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-06-05 04:06:28,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:28,535 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:28,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:28,558 INFO L225 Difference]: With dead ends: 19008 [2021-06-05 04:06:28,559 INFO L226 Difference]: Without dead ends: 19000 [2021-06-05 04:06:28,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-06-05 04:06:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-06-05 04:06:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.975354282193469) internal successors, (53119), 17853 states have internal predecessors, (53119), 0 states have call successors, (0), 0 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 04:06:28,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-06-05 04:06:28,794 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-06-05 04:06:28,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:28,794 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-06-05 04:06:28,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:28,794 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-06-05 04:06:28,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:28,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:28,807 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:29,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3024,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:29,008 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:29,008 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-06-05 04:06:29,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:29,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532241161] [2021-06-05 04:06:29,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:29,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:29,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532241161] [2021-06-05 04:06:29,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532241161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:29,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842683] [2021-06-05 04:06:29,092 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:29,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:06:29,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:29,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:29,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:29,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:29,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:29,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:29,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95078042] [2021-06-05 04:06:29,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:29,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:29,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:29,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:29,222 INFO L87 Difference]: Start difference. First operand 17854 states and 53119 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:29,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:29,423 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-06-05 04:06:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:29,444 INFO L225 Difference]: With dead ends: 18500 [2021-06-05 04:06:29,444 INFO L226 Difference]: Without dead ends: 18490 [2021-06-05 04:06:29,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-06-05 04:06:29,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-06-05 04:06:29,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.9751302302134097) internal successors, (53115), 17853 states have internal predecessors, (53115), 0 states have call successors, (0), 0 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 04:06:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-06-05 04:06:29,675 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-06-05 04:06:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:29,675 INFO L482 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-06-05 04:06:29,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-06-05 04:06:29,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:29,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:29,689 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:29,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3025,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:29,889 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-06-05 04:06:29,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:29,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610656086] [2021-06-05 04:06:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:29,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:29,948 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610656086] [2021-06-05 04:06:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610656086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685883672] [2021-06-05 04:06:29,948 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:29,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:30,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685883672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:30,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:30,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 04:06:30,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97186150] [2021-06-05 04:06:30,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:30,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:30,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:30,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:30,003 INFO L87 Difference]: Start difference. First operand 17854 states and 53115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:30,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:30,189 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-06-05 04:06:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:30,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:30,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:30,210 INFO L225 Difference]: With dead ends: 18151 [2021-06-05 04:06:30,210 INFO L226 Difference]: Without dead ends: 18139 [2021-06-05 04:06:30,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-06-05 04:06:30,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-06-05 04:06:30,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9742841100505335) internal successors, (52972), 17810 states have internal predecessors, (52972), 0 states have call successors, (0), 0 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 04:06:30,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-06-05 04:06:30,447 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-06-05 04:06:30,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:30,447 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-06-05 04:06:30,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-06-05 04:06:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:30,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:30,460 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:30,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3026,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:30,660 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:30,661 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-06-05 04:06:30,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:30,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388181835] [2021-06-05 04:06:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:30,725 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:30,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:30,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388181835] [2021-06-05 04:06:30,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388181835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:30,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680971592] [2021-06-05 04:06:30,726 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:30,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:30,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:30,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680971592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:30,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:30,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 04:06:30,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575309458] [2021-06-05 04:06:30,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:30,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:30,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:30,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:30,781 INFO L87 Difference]: Start difference. First operand 17811 states and 52972 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:30,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:30,982 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-06-05 04:06:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:30,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:30,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:31,002 INFO L225 Difference]: With dead ends: 18119 [2021-06-05 04:06:31,003 INFO L226 Difference]: Without dead ends: 18107 [2021-06-05 04:06:31,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:06:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-06-05 04:06:31,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-06-05 04:06:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17778 states have (on average 2.9742940713241084) internal successors, (52877), 17778 states have internal predecessors, (52877), 0 states have call successors, (0), 0 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 04:06:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-06-05 04:06:31,241 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-06-05 04:06:31,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:31,241 INFO L482 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-06-05 04:06:31,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:31,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-06-05 04:06:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:31,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:31,254 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:31,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3027,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:31,455 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:31,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:31,455 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-06-05 04:06:31,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:31,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974367222] [2021-06-05 04:06:31,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:31,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:31,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974367222] [2021-06-05 04:06:31,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974367222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:31,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834722576] [2021-06-05 04:06:31,523 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:31,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:06:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:31,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:31,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834722576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:31,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:31,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:31,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190391064] [2021-06-05 04:06:31,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:31,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:31,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:31,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:31,582 INFO L87 Difference]: Start difference. First operand 17779 states and 52877 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:31,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:31,798 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-06-05 04:06:31,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:31,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:31,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:31,869 INFO L225 Difference]: With dead ends: 18547 [2021-06-05 04:06:31,869 INFO L226 Difference]: Without dead ends: 18532 [2021-06-05 04:06:31,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:06:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-06-05 04:06:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-06-05 04:06:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17766 states, 17765 states have (on average 2.974838164931044) internal successors, (52848), 17765 states have internal predecessors, (52848), 0 states have call successors, (0), 0 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 04:06:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-06-05 04:06:32,078 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-06-05 04:06:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:32,078 INFO L482 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-06-05 04:06:32,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-06-05 04:06:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:32,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:32,091 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:32,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3028,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:32,291 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:32,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:32,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-06-05 04:06:32,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:32,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204316472] [2021-06-05 04:06:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:32,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204316472] [2021-06-05 04:06:32,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204316472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:32,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591236911] [2021-06-05 04:06:32,361 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:32,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:32,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:32,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591236911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:32,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:32,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:06:32,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475236832] [2021-06-05 04:06:32,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:32,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:32,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:32,422 INFO L87 Difference]: Start difference. First operand 17766 states and 52848 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:32,632 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-06-05 04:06:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:32,653 INFO L225 Difference]: With dead ends: 18019 [2021-06-05 04:06:32,653 INFO L226 Difference]: Without dead ends: 18009 [2021-06-05 04:06:32,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:06:32,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-06-05 04:06:32,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-06-05 04:06:32,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9744297381019433) internal successors, (52811), 17755 states have internal predecessors, (52811), 0 states have call successors, (0), 0 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 04:06:32,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-06-05 04:06:32,891 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-06-05 04:06:32,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:32,891 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-06-05 04:06:32,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:32,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-06-05 04:06:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:32,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:32,904 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:33,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3029,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:33,105 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-06-05 04:06:33,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:33,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603784778] [2021-06-05 04:06:33,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:33,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:33,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603784778] [2021-06-05 04:06:33,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603784778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:33,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401513413] [2021-06-05 04:06:33,150 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:33,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:33,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:33,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401513413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:33,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:33,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:06:33,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768966665] [2021-06-05 04:06:33,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:33,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:33,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:33,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:33,213 INFO L87 Difference]: Start difference. First operand 17756 states and 52811 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:33,316 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-06-05 04:06:33,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:33,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:33,339 INFO L225 Difference]: With dead ends: 18147 [2021-06-05 04:06:33,339 INFO L226 Difference]: Without dead ends: 18147 [2021-06-05 04:06:33,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-05 04:06:33,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-06-05 04:06:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17763 states, 17762 states have (on average 2.9734827159103703) internal successors, (52815), 17762 states have internal predecessors, (52815), 0 states have call successors, (0), 0 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 04:06:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-06-05 04:06:33,598 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-06-05 04:06:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:33,599 INFO L482 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-06-05 04:06:33,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-06-05 04:06:33,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:33,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:33,612 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:33,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3030 [2021-06-05 04:06:33,812 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-06-05 04:06:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:33,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701007416] [2021-06-05 04:06:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:33,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701007416] [2021-06-05 04:06:33,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701007416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:33,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616034546] [2021-06-05 04:06:33,875 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:33,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:06:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:33,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:33,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616034546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:33,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:33,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:06:33,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025789824] [2021-06-05 04:06:33,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:33,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:33,934 INFO L87 Difference]: Start difference. First operand 17763 states and 52815 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:34,108 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-06-05 04:06:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:34,129 INFO L225 Difference]: With dead ends: 18064 [2021-06-05 04:06:34,129 INFO L226 Difference]: Without dead ends: 18059 [2021-06-05 04:06:34,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:06:34,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-06-05 04:06:34,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-06-05 04:06:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17746 states have (on average 2.971599233630114) internal successors, (52734), 17746 states have internal predecessors, (52734), 0 states have call successors, (0), 0 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 04:06:34,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-06-05 04:06:34,425 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-06-05 04:06:34,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:34,425 INFO L482 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-06-05 04:06:34,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-06-05 04:06:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:34,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:34,439 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:34,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3031 [2021-06-05 04:06:34,639 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-06-05 04:06:34,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:34,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549195861] [2021-06-05 04:06:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:34,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:34,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549195861] [2021-06-05 04:06:34,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549195861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:34,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093729747] [2021-06-05 04:06:34,693 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:34,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:34,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:34,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093729747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:34,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:34,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:06:34,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443428312] [2021-06-05 04:06:34,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:34,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:34,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:34,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:34,753 INFO L87 Difference]: Start difference. First operand 17747 states and 52734 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:34,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:34,942 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-06-05 04:06:34,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:34,962 INFO L225 Difference]: With dead ends: 18047 [2021-06-05 04:06:34,962 INFO L226 Difference]: Without dead ends: 18039 [2021-06-05 04:06:34,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-06-05 04:06:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-06-05 04:06:35,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.970316027088036) internal successors, (52634), 17720 states have internal predecessors, (52634), 0 states have call successors, (0), 0 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 04:06:35,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-06-05 04:06:35,197 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-06-05 04:06:35,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:35,197 INFO L482 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-06-05 04:06:35,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:35,197 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-06-05 04:06:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:35,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:35,210 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:35,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3032,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:35,411 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:35,411 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-06-05 04:06:35,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:35,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030480915] [2021-06-05 04:06:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:35,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030480915] [2021-06-05 04:06:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030480915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101859614] [2021-06-05 04:06:35,470 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:35,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:35,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:35,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:35,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:35,531 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:35,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101859614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:35,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:35,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 04:06:35,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739740944] [2021-06-05 04:06:35,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:35,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:35,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:35,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:35,531 INFO L87 Difference]: Start difference. First operand 17721 states and 52634 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:35,724 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-06-05 04:06:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:35,744 INFO L225 Difference]: With dead ends: 18021 [2021-06-05 04:06:35,744 INFO L226 Difference]: Without dead ends: 18012 [2021-06-05 04:06:35,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:06:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-06-05 04:06:35,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-06-05 04:06:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9697808404880255) internal successors, (52577), 17704 states have internal predecessors, (52577), 0 states have call successors, (0), 0 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 04:06:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-06-05 04:06:35,983 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-06-05 04:06:35,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:35,984 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-06-05 04:06:35,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:35,984 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-06-05 04:06:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:35,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:35,997 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:36,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3033 [2021-06-05 04:06:36,197 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:36,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-06-05 04:06:36,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:36,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196486250] [2021-06-05 04:06:36,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:36,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196486250] [2021-06-05 04:06:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196486250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:36,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106300056] [2021-06-05 04:06:36,262 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:36,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:06:36,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:36,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:36,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:36,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106300056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:36,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:36,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:06:36,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802006606] [2021-06-05 04:06:36,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:36,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:36,325 INFO L87 Difference]: Start difference. First operand 17705 states and 52577 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:36,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:36,518 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-06-05 04:06:36,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:36,518 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:36,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:36,540 INFO L225 Difference]: With dead ends: 19443 [2021-06-05 04:06:36,540 INFO L226 Difference]: Without dead ends: 19435 [2021-06-05 04:06:36,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:06:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-06-05 04:06:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-06-05 04:06:36,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17759 states, 17758 states have (on average 2.968802793107332) internal successors, (52720), 17758 states have internal predecessors, (52720), 0 states have call successors, (0), 0 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 04:06:36,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-06-05 04:06:36,779 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-06-05 04:06:36,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:36,779 INFO L482 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-06-05 04:06:36,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:36,779 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-06-05 04:06:36,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:36,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:36,793 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:36,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3034 [2021-06-05 04:06:36,993 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:36,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:36,994 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-06-05 04:06:36,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:36,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137632681] [2021-06-05 04:06:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:37,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:37,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137632681] [2021-06-05 04:06:37,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137632681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:37,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770973997] [2021-06-05 04:06:37,077 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:37,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:37,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:37,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770973997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:37,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:37,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:06:37,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504568980] [2021-06-05 04:06:37,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:37,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:37,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:37,138 INFO L87 Difference]: Start difference. First operand 17759 states and 52720 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:37,401 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-06-05 04:06:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:37,427 INFO L225 Difference]: With dead ends: 19462 [2021-06-05 04:06:37,427 INFO L226 Difference]: Without dead ends: 19452 [2021-06-05 04:06:37,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:06:37,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-06-05 04:06:37,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-06-05 04:06:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967778152015269) internal successors, (52868), 17814 states have internal predecessors, (52868), 0 states have call successors, (0), 0 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 04:06:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-06-05 04:06:37,741 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-06-05 04:06:37,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:37,741 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-06-05 04:06:37,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:37,741 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-06-05 04:06:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:37,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:37,755 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:37,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3035,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:37,955 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:37,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:37,956 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-06-05 04:06:37,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:37,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923639941] [2021-06-05 04:06:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:38,036 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:38,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:38,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923639941] [2021-06-05 04:06:38,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923639941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:38,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165160946] [2021-06-05 04:06:38,036 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:38,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:38,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:38,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:38,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:38,105 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165160946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:38,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:38,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:06:38,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420267667] [2021-06-05 04:06:38,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:38,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:38,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:38,106 INFO L87 Difference]: Start difference. First operand 17815 states and 52868 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:38,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:38,366 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-06-05 04:06:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:06:38,367 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:38,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:38,388 INFO L225 Difference]: With dead ends: 18858 [2021-06-05 04:06:38,388 INFO L226 Difference]: Without dead ends: 18846 [2021-06-05 04:06:38,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 197.3ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:06:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-06-05 04:06:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-06-05 04:06:38,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967497473896935) internal successors, (52863), 17814 states have internal predecessors, (52863), 0 states have call successors, (0), 0 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 04:06:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-06-05 04:06:38,616 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-06-05 04:06:38,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:38,616 INFO L482 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-06-05 04:06:38,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:38,616 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-06-05 04:06:38,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:38,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:38,629 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:38,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3036,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:38,830 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:38,830 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-06-05 04:06:38,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:38,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925364730] [2021-06-05 04:06:38,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:38,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:38,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925364730] [2021-06-05 04:06:38,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925364730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:38,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712469059] [2021-06-05 04:06:38,907 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:38,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:38,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:38,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712469059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:38,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:38,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:38,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596381150] [2021-06-05 04:06:38,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:38,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:38,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:38,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:38,969 INFO L87 Difference]: Start difference. First operand 17815 states and 52863 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:39,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:39,170 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-06-05 04:06:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:39,171 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:39,192 INFO L225 Difference]: With dead ends: 18134 [2021-06-05 04:06:39,192 INFO L226 Difference]: Without dead ends: 18122 [2021-06-05 04:06:39,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-06-05 04:06:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-06-05 04:06:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 17753 states have (on average 2.9667661803638823) internal successors, (52669), 17753 states have internal predecessors, (52669), 0 states have call successors, (0), 0 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 04:06:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-06-05 04:06:39,435 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-06-05 04:06:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:39,435 INFO L482 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-06-05 04:06:39,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-06-05 04:06:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:39,449 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:39,449 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:39,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3037 [2021-06-05 04:06:39,650 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:39,650 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-06-05 04:06:39,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:39,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698782934] [2021-06-05 04:06:39,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:39,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:39,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698782934] [2021-06-05 04:06:39,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698782934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:39,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689161834] [2021-06-05 04:06:39,731 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:39,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:39,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:39,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689161834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:39,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:39,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 04:06:39,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249303253] [2021-06-05 04:06:39,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:39,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:39,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:39,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:39,787 INFO L87 Difference]: Start difference. First operand 17754 states and 52669 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:39,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:39,993 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-06-05 04:06:39,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:39,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:39,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:40,014 INFO L225 Difference]: With dead ends: 18086 [2021-06-05 04:06:40,014 INFO L226 Difference]: Without dead ends: 18076 [2021-06-05 04:06:40,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-06-05 04:06:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-06-05 04:06:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.966476984618852) internal successors, (52652), 17749 states have internal predecessors, (52652), 0 states have call successors, (0), 0 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 04:06:40,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-06-05 04:06:40,257 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-06-05 04:06:40,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:40,257 INFO L482 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-06-05 04:06:40,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:40,258 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-06-05 04:06:40,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:40,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:40,270 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:40,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3038,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:40,471 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:40,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:40,471 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-06-05 04:06:40,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:40,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854109987] [2021-06-05 04:06:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:40,556 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:40,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:40,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854109987] [2021-06-05 04:06:40,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854109987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:40,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145534479] [2021-06-05 04:06:40,557 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:40,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:40,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:40,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:40,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145534479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:40,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:40,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 04:06:40,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240760554] [2021-06-05 04:06:40,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:40,614 INFO L87 Difference]: Start difference. First operand 17750 states and 52652 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:40,881 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-06-05 04:06:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:06:40,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:40,903 INFO L225 Difference]: With dead ends: 18572 [2021-06-05 04:06:40,903 INFO L226 Difference]: Without dead ends: 18560 [2021-06-05 04:06:40,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:06:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-06-05 04:06:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-06-05 04:06:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966463758313606) internal successors, (52631), 17742 states have internal predecessors, (52631), 0 states have call successors, (0), 0 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 04:06:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-06-05 04:06:41,130 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-06-05 04:06:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:41,130 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-06-05 04:06:41,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-06-05 04:06:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:41,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:41,143 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:41,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:41,343 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:41,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:41,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-06-05 04:06:41,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:41,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614389780] [2021-06-05 04:06:41,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:41,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:41,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614389780] [2021-06-05 04:06:41,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614389780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:41,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761254285] [2021-06-05 04:06:41,424 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:41,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:06:41,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:41,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:41,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:41,483 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:41,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761254285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:41,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:41,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:06:41,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469525865] [2021-06-05 04:06:41,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:41,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:41,483 INFO L87 Difference]: Start difference. First operand 17743 states and 52631 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:41,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:41,677 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-06-05 04:06:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:41,700 INFO L225 Difference]: With dead ends: 19073 [2021-06-05 04:06:41,700 INFO L226 Difference]: Without dead ends: 19061 [2021-06-05 04:06:41,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-06-05 04:06:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-06-05 04:06:41,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966294668019389) internal successors, (52628), 17742 states have internal predecessors, (52628), 0 states have call successors, (0), 0 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 04:06:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-06-05 04:06:41,934 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-06-05 04:06:41,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:41,934 INFO L482 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-06-05 04:06:41,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-06-05 04:06:41,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:41,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:41,948 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:42,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3040 [2021-06-05 04:06:42,148 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-06-05 04:06:42,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:42,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55303856] [2021-06-05 04:06:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:42,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:42,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55303856] [2021-06-05 04:06:42,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55303856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:42,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962223968] [2021-06-05 04:06:42,197 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:42,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:42,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:42,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962223968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:42,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:42,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-05 04:06:42,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765562733] [2021-06-05 04:06:42,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:06:42,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:42,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:06:42,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:06:42,258 INFO L87 Difference]: Start difference. First operand 17743 states and 52628 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:42,354 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-06-05 04:06:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:42,375 INFO L225 Difference]: With dead ends: 18066 [2021-06-05 04:06:42,375 INFO L226 Difference]: Without dead ends: 18064 [2021-06-05 04:06:42,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-06-05 04:06:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-06-05 04:06:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 2.966110296605391) internal successors, (52601), 17734 states have internal predecessors, (52601), 0 states have call successors, (0), 0 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 04:06:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-06-05 04:06:42,615 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-06-05 04:06:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:42,615 INFO L482 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-06-05 04:06:42,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-06-05 04:06:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:42,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:42,628 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:42,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3041 [2021-06-05 04:06:42,829 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:42,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:42,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-06-05 04:06:42,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:42,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19727530] [2021-06-05 04:06:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:42,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19727530] [2021-06-05 04:06:42,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19727530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:42,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246603620] [2021-06-05 04:06:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:42,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:06:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:42,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:42,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:42,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246603620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:42,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:42,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:06:42,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888881758] [2021-06-05 04:06:42,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:42,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:42,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:42,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:42,940 INFO L87 Difference]: Start difference. First operand 17735 states and 52601 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:43,042 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-06-05 04:06:43,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:06:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:43,062 INFO L225 Difference]: With dead ends: 18041 [2021-06-05 04:06:43,063 INFO L226 Difference]: Without dead ends: 18041 [2021-06-05 04:06:43,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:43,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-06-05 04:06:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-06-05 04:06:43,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17719 states, 17718 states have (on average 2.9652895360650184) internal successors, (52539), 17718 states have internal predecessors, (52539), 0 states have call successors, (0), 0 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 04:06:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-06-05 04:06:43,301 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-06-05 04:06:43,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:43,301 INFO L482 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-06-05 04:06:43,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:43,302 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-06-05 04:06:43,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:43,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:43,315 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:43,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3042 [2021-06-05 04:06:43,515 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:43,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:43,516 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-06-05 04:06:43,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:43,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932929399] [2021-06-05 04:06:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:43,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:43,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932929399] [2021-06-05 04:06:43,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932929399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:43,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164846819] [2021-06-05 04:06:43,569 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:43,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:06:43,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:43,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164846819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:43,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:43,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:06:43,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244335680] [2021-06-05 04:06:43,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:43,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:43,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:43,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:43,630 INFO L87 Difference]: Start difference. First operand 17719 states and 52539 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:43,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:43,792 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-06-05 04:06:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:06:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:43,813 INFO L225 Difference]: With dead ends: 18030 [2021-06-05 04:06:43,813 INFO L226 Difference]: Without dead ends: 18027 [2021-06-05 04:06:43,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:06:43,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-06-05 04:06:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-06-05 04:06:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.963973121011915) internal successors, (52489), 17709 states have internal predecessors, (52489), 0 states have call successors, (0), 0 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 04:06:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-06-05 04:06:44,090 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-06-05 04:06:44,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:44,090 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-06-05 04:06:44,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:44,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-06-05 04:06:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:44,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:44,104 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:44,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3043 [2021-06-05 04:06:44,304 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:44,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:44,305 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-06-05 04:06:44,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:44,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244129167] [2021-06-05 04:06:44,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:44,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244129167] [2021-06-05 04:06:44,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244129167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:44,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465308333] [2021-06-05 04:06:44,364 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:44,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:44,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:44,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465308333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:44,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:44,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 04:06:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096246176] [2021-06-05 04:06:44,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:44,420 INFO L87 Difference]: Start difference. First operand 17710 states and 52489 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:44,601 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-06-05 04:06:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:44,622 INFO L225 Difference]: With dead ends: 18025 [2021-06-05 04:06:44,622 INFO L226 Difference]: Without dead ends: 18021 [2021-06-05 04:06:44,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:44,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-06-05 04:06:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-06-05 04:06:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.9626178779151844) internal successors, (52465), 17709 states have internal predecessors, (52465), 0 states have call successors, (0), 0 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 04:06:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-06-05 04:06:44,861 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-06-05 04:06:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:44,861 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-06-05 04:06:44,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-06-05 04:06:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:44,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:44,874 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:45,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3044 [2021-06-05 04:06:45,075 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:45,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:45,075 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-06-05 04:06:45,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:45,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217532376] [2021-06-05 04:06:45,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:45,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217532376] [2021-06-05 04:06:45,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217532376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233504504] [2021-06-05 04:06:45,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:45,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:45,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:45,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233504504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-06-05 04:06:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665578570] [2021-06-05 04:06:45,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:45,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:45,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:45,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:45,191 INFO L87 Difference]: Start difference. First operand 17710 states and 52465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:45,357 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-06-05 04:06:45,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:06:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:45,381 INFO L225 Difference]: With dead ends: 20107 [2021-06-05 04:06:45,381 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 04:06:45,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:45,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 04:06:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-06-05 04:06:45,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.962222598678638) internal successors, (52458), 17709 states have internal predecessors, (52458), 0 states have call successors, (0), 0 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 04:06:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-06-05 04:06:45,621 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-06-05 04:06:45,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:45,622 INFO L482 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-06-05 04:06:45,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-06-05 04:06:45,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:45,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:45,635 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:45,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3045 [2021-06-05 04:06:45,836 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:45,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:45,836 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-06-05 04:06:45,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:45,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194855845] [2021-06-05 04:06:45,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:45,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194855845] [2021-06-05 04:06:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194855845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645051554] [2021-06-05 04:06:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:45,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:45,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:45,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645051554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:45,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:45,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:45,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182770488] [2021-06-05 04:06:45,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:45,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:45,966 INFO L87 Difference]: Start difference. First operand 17710 states and 52458 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:46,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:46,160 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-06-05 04:06:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:46,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:46,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:46,184 INFO L225 Difference]: With dead ends: 20128 [2021-06-05 04:06:46,184 INFO L226 Difference]: Without dead ends: 20120 [2021-06-05 04:06:46,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:46,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-06-05 04:06:46,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-06-05 04:06:46,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9632229084783828) internal successors, (52775), 17810 states have internal predecessors, (52775), 0 states have call successors, (0), 0 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 04:06:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-06-05 04:06:46,436 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-06-05 04:06:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:46,436 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-06-05 04:06:46,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-06-05 04:06:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:46,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:46,450 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:46,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3046,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:46,651 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-06-05 04:06:46,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:46,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453244706] [2021-06-05 04:06:46,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:46,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:46,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:46,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453244706] [2021-06-05 04:06:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453244706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:46,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975801151] [2021-06-05 04:06:46,723 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:46,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:46,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:46,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:46,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975801151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:46,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:46,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 04:06:46,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026440894] [2021-06-05 04:06:46,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:46,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:46,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:46,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:46,780 INFO L87 Difference]: Start difference. First operand 17811 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:46,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:46,972 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-06-05 04:06:46,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:46,973 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:46,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:46,998 INFO L225 Difference]: With dead ends: 19877 [2021-06-05 04:06:46,998 INFO L226 Difference]: Without dead ends: 19867 [2021-06-05 04:06:46,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 146.4ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-06-05 04:06:47,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-06-05 04:06:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.963054463784391) internal successors, (52772), 17810 states have internal predecessors, (52772), 0 states have call successors, (0), 0 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 04:06:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-06-05 04:06:47,279 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-06-05 04:06:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:47,279 INFO L482 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-06-05 04:06:47,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-06-05 04:06:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:47,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:47,293 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:47,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3047,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:47,494 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-06-05 04:06:47,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:47,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142350720] [2021-06-05 04:06:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:47,573 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:47,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:47,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142350720] [2021-06-05 04:06:47,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142350720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:47,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950016953] [2021-06-05 04:06:47,573 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:47,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:47,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:47,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:47,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950016953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:47,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:47,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:06:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139139009] [2021-06-05 04:06:47,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:47,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:47,631 INFO L87 Difference]: Start difference. First operand 17811 states and 52772 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:47,849 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-06-05 04:06:47,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:47,849 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:47,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:47,875 INFO L225 Difference]: With dead ends: 19900 [2021-06-05 04:06:47,875 INFO L226 Difference]: Without dead ends: 19888 [2021-06-05 04:06:47,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:06:47,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-06-05 04:06:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-06-05 04:06:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9629047645771367) internal successors, (52796), 17819 states have internal predecessors, (52796), 0 states have call successors, (0), 0 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 04:06:48,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-06-05 04:06:48,120 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-06-05 04:06:48,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:48,120 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-06-05 04:06:48,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:48,120 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-06-05 04:06:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:48,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:48,133 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:48,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3048,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:48,333 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:48,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:48,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-06-05 04:06:48,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:48,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782480670] [2021-06-05 04:06:48,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:48,418 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:48,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782480670] [2021-06-05 04:06:48,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782480670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:48,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464143744] [2021-06-05 04:06:48,418 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:48,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:48,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:48,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:48,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:48,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464143744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:48,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:48,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:06:48,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215788658] [2021-06-05 04:06:48,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:48,477 INFO L87 Difference]: Start difference. First operand 17820 states and 52796 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:48,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:48,753 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-06-05 04:06:48,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:48,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:48,775 INFO L225 Difference]: With dead ends: 18844 [2021-06-05 04:06:48,775 INFO L226 Difference]: Without dead ends: 18830 [2021-06-05 04:06:48,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 210.5ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:06:48,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-06-05 04:06:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-06-05 04:06:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9627925248330436) internal successors, (52794), 17819 states have internal predecessors, (52794), 0 states have call successors, (0), 0 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 04:06:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-06-05 04:06:49,011 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-06-05 04:06:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-06-05 04:06:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-06-05 04:06:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:49,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:49,025 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:49,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3049 [2021-06-05 04:06:49,225 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-06-05 04:06:49,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:49,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547920033] [2021-06-05 04:06:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:49,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547920033] [2021-06-05 04:06:49,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547920033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:49,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276633270] [2021-06-05 04:06:49,294 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:49,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:49,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:49,355 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:49,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276633270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:49,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:49,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:06:49,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452207195] [2021-06-05 04:06:49,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:49,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:49,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:49,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:49,356 INFO L87 Difference]: Start difference. First operand 17820 states and 52794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:49,528 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-06-05 04:06:49,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:06:49,528 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:49,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:49,549 INFO L225 Difference]: With dead ends: 17961 [2021-06-05 04:06:49,549 INFO L226 Difference]: Without dead ends: 17955 [2021-06-05 04:06:49,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:06:49,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-06-05 04:06:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-06-05 04:06:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.962160031533307) internal successors, (52605), 17759 states have internal predecessors, (52605), 0 states have call successors, (0), 0 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 04:06:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-06-05 04:06:49,772 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-06-05 04:06:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:49,772 INFO L482 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-06-05 04:06:49,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-06-05 04:06:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:49,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:49,786 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:49,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3050 [2021-06-05 04:06:49,986 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-06-05 04:06:49,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:49,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869281040] [2021-06-05 04:06:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:49,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:50,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:50,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869281040] [2021-06-05 04:06:50,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869281040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:50,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49482215] [2021-06-05 04:06:50,064 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:50,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:50,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:50,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:50,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:50,119 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:50,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49482215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:50,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:50,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 04:06:50,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476199189] [2021-06-05 04:06:50,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:50,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:50,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:50,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:50,120 INFO L87 Difference]: Start difference. First operand 17760 states and 52605 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:50,317 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-06-05 04:06:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:50,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:50,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:50,337 INFO L225 Difference]: With dead ends: 18138 [2021-06-05 04:06:50,337 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 04:06:50,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:50,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 04:06:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-06-05 04:06:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17755 states, 17754 states have (on average 2.9613608200968797) internal successors, (52576), 17754 states have internal predecessors, (52576), 0 states have call successors, (0), 0 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 04:06:50,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-06-05 04:06:50,598 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-06-05 04:06:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:50,598 INFO L482 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-06-05 04:06:50,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-06-05 04:06:50,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:50,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:50,612 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:50,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3051 [2021-06-05 04:06:50,812 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:50,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-06-05 04:06:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:50,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665486466] [2021-06-05 04:06:50,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:50,874 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:50,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665486466] [2021-06-05 04:06:50,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665486466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:50,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11228731] [2021-06-05 04:06:50,874 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:50,934 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:50,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11228731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:50,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:50,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:06:50,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878566161] [2021-06-05 04:06:50,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:50,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:50,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:50,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:50,935 INFO L87 Difference]: Start difference. First operand 17755 states and 52576 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:51,105 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-06-05 04:06:51,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:06:51,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:51,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:51,128 INFO L225 Difference]: With dead ends: 18122 [2021-06-05 04:06:51,128 INFO L226 Difference]: Without dead ends: 18113 [2021-06-05 04:06:51,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:06:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-06-05 04:06:51,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-06-05 04:06:51,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960139820713762) internal successors, (52504), 17737 states have internal predecessors, (52504), 0 states have call successors, (0), 0 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 04:06:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-06-05 04:06:51,364 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-06-05 04:06:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:51,364 INFO L482 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-06-05 04:06:51,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-06-05 04:06:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:51,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:51,377 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:51,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3052 [2021-06-05 04:06:51,577 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:51,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:51,578 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-06-05 04:06:51,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:51,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506875209] [2021-06-05 04:06:51,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:51,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:51,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506875209] [2021-06-05 04:06:51,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506875209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:51,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202464292] [2021-06-05 04:06:51,646 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:51,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:51,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:51,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:51,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202464292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:51,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:51,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 04:06:51,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265117953] [2021-06-05 04:06:51,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:51,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:51,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:51,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:51,703 INFO L87 Difference]: Start difference. First operand 17738 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:51,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:51,881 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-06-05 04:06:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:06:51,882 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:51,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:51,901 INFO L225 Difference]: With dead ends: 18117 [2021-06-05 04:06:51,901 INFO L226 Difference]: Without dead ends: 18109 [2021-06-05 04:06:51,902 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:06:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-06-05 04:06:52,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-06-05 04:06:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9588848211771333) internal successors, (52535), 17755 states have internal predecessors, (52535), 0 states have call successors, (0), 0 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 04:06:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-06-05 04:06:52,155 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-06-05 04:06:52,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:52,155 INFO L482 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-06-05 04:06:52,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-06-05 04:06:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:52,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:52,169 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:52,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3053,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:52,369 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:52,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-06-05 04:06:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:52,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557967875] [2021-06-05 04:06:52,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:52,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557967875] [2021-06-05 04:06:52,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557967875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:52,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395137744] [2021-06-05 04:06:52,440 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:52,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:06:52,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:52,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:52,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395137744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:52,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:52,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-06-05 04:06:52,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345853873] [2021-06-05 04:06:52,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:06:52,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:52,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:06:52,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:52,497 INFO L87 Difference]: Start difference. First operand 17756 states and 52535 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:52,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:52,707 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-06-05 04:06:52,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:52,708 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:06:52,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:52,730 INFO L225 Difference]: With dead ends: 19811 [2021-06-05 04:06:52,730 INFO L226 Difference]: Without dead ends: 19801 [2021-06-05 04:06:52,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:52,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-06-05 04:06:52,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-06-05 04:06:52,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17805 states, 17804 states have (on average 2.9582116378341947) internal successors, (52668), 17804 states have internal predecessors, (52668), 0 states have call successors, (0), 0 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 04:06:52,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-06-05 04:06:52,961 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-06-05 04:06:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:52,961 INFO L482 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-06-05 04:06:52,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:06:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-06-05 04:06:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:52,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:52,974 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:53,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3054 [2021-06-05 04:06:53,175 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:53,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-06-05 04:06:53,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:53,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044976455] [2021-06-05 04:06:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:53,254 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:53,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:53,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044976455] [2021-06-05 04:06:53,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044976455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:53,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654154477] [2021-06-05 04:06:53,254 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:53,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:06:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:53,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:53,312 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:53,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654154477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:53,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:53,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:06:53,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172430806] [2021-06-05 04:06:53,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:53,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:53,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:53,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:53,313 INFO L87 Difference]: Start difference. First operand 17805 states and 52668 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:53,529 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-06-05 04:06:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:53,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:53,551 INFO L225 Difference]: With dead ends: 19831 [2021-06-05 04:06:53,551 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 04:06:53,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:06:53,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 04:06:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-06-05 04:06:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9575302554908114) internal successors, (52786), 17848 states have internal predecessors, (52786), 0 states have call successors, (0), 0 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 04:06:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-06-05 04:06:53,836 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-06-05 04:06:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:53,836 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-06-05 04:06:53,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-06-05 04:06:53,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:53,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:53,850 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:54,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3055,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:54,050 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-06-05 04:06:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:54,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214369256] [2021-06-05 04:06:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:54,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:54,131 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214369256] [2021-06-05 04:06:54,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214369256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:54,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084754196] [2021-06-05 04:06:54,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:54,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084754196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:54,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:54,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-06-05 04:06:54,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845862918] [2021-06-05 04:06:54,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:54,187 INFO L87 Difference]: Start difference. First operand 17849 states and 52786 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:54,448 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-06-05 04:06:54,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:54,471 INFO L225 Difference]: With dead ends: 19267 [2021-06-05 04:06:54,471 INFO L226 Difference]: Without dead ends: 19253 [2021-06-05 04:06:54,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:06:54,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-06-05 04:06:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-06-05 04:06:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9572501120573733) internal successors, (52781), 17848 states have internal predecessors, (52781), 0 states have call successors, (0), 0 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 04:06:54,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-06-05 04:06:54,706 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-06-05 04:06:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:54,706 INFO L482 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-06-05 04:06:54,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-06-05 04:06:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:54,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:54,720 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:54,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3056 [2021-06-05 04:06:54,920 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:54,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:54,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-06-05 04:06:54,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:54,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32532067] [2021-06-05 04:06:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:54,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32532067] [2021-06-05 04:06:54,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32532067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:54,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228438922] [2021-06-05 04:06:54,980 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:55,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:55,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:55,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:55,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228438922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:55,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:55,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:06:55,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165928543] [2021-06-05 04:06:55,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:06:55,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:55,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:06:55,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:06:55,043 INFO L87 Difference]: Start difference. First operand 17849 states and 52781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:55,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:55,179 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-06-05 04:06:55,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:06:55,179 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:55,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:55,201 INFO L225 Difference]: With dead ends: 18130 [2021-06-05 04:06:55,202 INFO L226 Difference]: Without dead ends: 18126 [2021-06-05 04:06:55,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:06:55,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-06-05 04:06:55,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-06-05 04:06:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17787 states, 17786 states have (on average 2.9562015068031036) internal successors, (52579), 17786 states have internal predecessors, (52579), 0 states have call successors, (0), 0 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 04:06:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-06-05 04:06:55,431 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-06-05 04:06:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:55,432 INFO L482 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-06-05 04:06:55,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-06-05 04:06:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:55,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:55,445 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:55,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3057,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:55,646 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:55,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:55,646 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-06-05 04:06:55,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:55,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787481179] [2021-06-05 04:06:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:55,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:55,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787481179] [2021-06-05 04:06:55,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787481179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:55,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25588720] [2021-06-05 04:06:55,717 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:55,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:06:55,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:55,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:55,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:55,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25588720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:55,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:55,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:06:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558806552] [2021-06-05 04:06:55,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:06:55,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:06:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:06:55,781 INFO L87 Difference]: Start difference. First operand 17787 states and 52579 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:55,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:55,973 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-06-05 04:06:55,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:06:55,973 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:55,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:55,995 INFO L225 Difference]: With dead ends: 18203 [2021-06-05 04:06:55,995 INFO L226 Difference]: Without dead ends: 18188 [2021-06-05 04:06:55,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:06:56,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-06-05 04:06:56,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-06-05 04:06:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 2.9543224496701064) internal successors, (52389), 17733 states have internal predecessors, (52389), 0 states have call successors, (0), 0 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 04:06:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-06-05 04:06:56,234 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-06-05 04:06:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:56,234 INFO L482 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-06-05 04:06:56,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-06-05 04:06:56,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:56,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:56,248 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:56,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3058,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:56,448 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-06-05 04:06:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:56,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817793035] [2021-06-05 04:06:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:56,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817793035] [2021-06-05 04:06:56,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817793035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:56,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318966513] [2021-06-05 04:06:56,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:56,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:06:56,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:56,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:56,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:56,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318966513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:56,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:56,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 04:06:56,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838969045] [2021-06-05 04:06:56,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:56,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:56,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:56,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:56,593 INFO L87 Difference]: Start difference. First operand 17734 states and 52389 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:56,803 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-06-05 04:06:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:56,803 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:56,824 INFO L225 Difference]: With dead ends: 18155 [2021-06-05 04:06:56,824 INFO L226 Difference]: Without dead ends: 18143 [2021-06-05 04:06:56,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 160.6ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:06:56,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-06-05 04:06:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-06-05 04:06:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9526660641662903) internal successors, (52274), 17704 states have internal predecessors, (52274), 0 states have call successors, (0), 0 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 04:06:57,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-06-05 04:06:57,099 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-06-05 04:06:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:57,099 INFO L482 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-06-05 04:06:57,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:57,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-06-05 04:06:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:57,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:57,112 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:57,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:57,313 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-06-05 04:06:57,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:57,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449452822] [2021-06-05 04:06:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:57,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449452822] [2021-06-05 04:06:57,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449452822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145295536] [2021-06-05 04:06:57,396 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:57,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:06:57,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:57,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:57,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145295536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:57,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:57,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:06:57,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858011955] [2021-06-05 04:06:57,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:57,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:57,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:57,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:57,461 INFO L87 Difference]: Start difference. First operand 17705 states and 52274 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:57,713 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-06-05 04:06:57,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:06:57,713 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:57,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:57,734 INFO L225 Difference]: With dead ends: 18640 [2021-06-05 04:06:57,735 INFO L226 Difference]: Without dead ends: 18626 [2021-06-05 04:06:57,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:06:57,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-06-05 04:06:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-06-05 04:06:57,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 17705 states have (on average 2.952216887884778) internal successors, (52269), 17705 states have internal predecessors, (52269), 0 states have call successors, (0), 0 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 04:06:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-06-05 04:06:57,973 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-06-05 04:06:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:57,974 INFO L482 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-06-05 04:06:57,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:57,974 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-06-05 04:06:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:57,987 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:57,987 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:58,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3060,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:58,187 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:58,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-06-05 04:06:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:58,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867715233] [2021-06-05 04:06:58,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:58,242 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:58,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:58,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867715233] [2021-06-05 04:06:58,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867715233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:58,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965239440] [2021-06-05 04:06:58,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:58,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:06:58,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:58,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:06:58,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965239440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:58,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:06:58,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000094187] [2021-06-05 04:06:58,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:58,306 INFO L87 Difference]: Start difference. First operand 17706 states and 52269 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:58,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:58,418 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-06-05 04:06:58,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:06:58,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:58,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:58,439 INFO L225 Difference]: With dead ends: 18069 [2021-06-05 04:06:58,439 INFO L226 Difference]: Without dead ends: 18069 [2021-06-05 04:06:58,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:58,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-06-05 04:06:58,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-06-05 04:06:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 2.9522249830585046) internal successors, (52278), 17708 states have internal predecessors, (52278), 0 states have call successors, (0), 0 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 04:06:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-06-05 04:06:58,677 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-06-05 04:06:58,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:58,677 INFO L482 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-06-05 04:06:58,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:58,678 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-06-05 04:06:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:58,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:58,691 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:58,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3061 [2021-06-05 04:06:58,892 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-06-05 04:06:58,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:58,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500969014] [2021-06-05 04:06:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:58,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:58,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500969014] [2021-06-05 04:06:58,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500969014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:58,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420499594] [2021-06-05 04:06:58,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:06:59,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420499594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:59,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:59,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 04:06:59,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061566534] [2021-06-05 04:06:59,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:06:59,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:59,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:06:59,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:06:59,036 INFO L87 Difference]: Start difference. First operand 17709 states and 52278 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:59,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:59,269 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-06-05 04:06:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:06:59,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:59,292 INFO L225 Difference]: With dead ends: 19393 [2021-06-05 04:06:59,292 INFO L226 Difference]: Without dead ends: 19379 [2021-06-05 04:06:59,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 181.1ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:06:59,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-06-05 04:06:59,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-06-05 04:06:59,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17740 states, 17739 states have (on average 2.9508991487682508) internal successors, (52346), 17739 states have internal predecessors, (52346), 0 states have call successors, (0), 0 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 04:06:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-06-05 04:06:59,523 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-06-05 04:06:59,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:06:59,523 INFO L482 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-06-05 04:06:59,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-06-05 04:06:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:06:59,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:06:59,537 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:06:59,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3062 [2021-06-05 04:06:59,738 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:06:59,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:06:59,738 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-06-05 04:06:59,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:06:59,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389725983] [2021-06-05 04:06:59,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:06:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:06:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:06:59,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:06:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389725983] [2021-06-05 04:06:59,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389725983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:59,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124171887] [2021-06-05 04:06:59,786 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:06:59,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:06:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:06:59,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:06:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:06:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:06:59,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124171887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:06:59,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:06:59,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-06-05 04:06:59,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517851508] [2021-06-05 04:06:59,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:06:59,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:06:59,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:06:59,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:06:59,849 INFO L87 Difference]: Start difference. First operand 17740 states and 52346 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:06:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:06:59,946 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-06-05 04:06:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:06:59,946 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:06:59,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:06:59,965 INFO L225 Difference]: With dead ends: 18165 [2021-06-05 04:06:59,966 INFO L226 Difference]: Without dead ends: 18165 [2021-06-05 04:06:59,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:06:59,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-06-05 04:07:00,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-06-05 04:07:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9512621140410187) internal successors, (52379), 17748 states have internal predecessors, (52379), 0 states have call successors, (0), 0 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 04:07:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-06-05 04:07:00,241 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-06-05 04:07:00,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:00,241 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-06-05 04:07:00,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:00,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-06-05 04:07:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:00,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:00,254 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:00,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3063,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:00,455 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-06-05 04:07:00,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:00,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263608785] [2021-06-05 04:07:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:00,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:00,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263608785] [2021-06-05 04:07:00,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263608785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:00,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14132275] [2021-06-05 04:07:00,508 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:00,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:00,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:00,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:00,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:00,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14132275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:00,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:00,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:07:00,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397146437] [2021-06-05 04:07:00,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:07:00,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:00,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:07:00,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:07:00,565 INFO L87 Difference]: Start difference. First operand 17749 states and 52379 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:00,720 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-06-05 04:07:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:07:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:00,740 INFO L225 Difference]: With dead ends: 18087 [2021-06-05 04:07:00,740 INFO L226 Difference]: Without dead ends: 18085 [2021-06-05 04:07:00,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:07:00,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-06-05 04:07:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-06-05 04:07:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9509240477800316) internal successors, (52373), 17748 states have internal predecessors, (52373), 0 states have call successors, (0), 0 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 04:07:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-06-05 04:07:00,980 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-06-05 04:07:00,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:00,980 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-06-05 04:07:00,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-06-05 04:07:00,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:00,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:00,994 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:01,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3064 [2021-06-05 04:07:01,194 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-06-05 04:07:01,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:01,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188323775] [2021-06-05 04:07:01,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:01,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188323775] [2021-06-05 04:07:01,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188323775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:01,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879597308] [2021-06-05 04:07:01,249 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:01,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:01,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:01,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:01,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:01,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879597308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:01,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:01,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-06-05 04:07:01,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852732698] [2021-06-05 04:07:01,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:07:01,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:01,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:07:01,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:07:01,310 INFO L87 Difference]: Start difference. First operand 17749 states and 52373 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:01,489 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-06-05 04:07:01,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:07:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:07:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:01,511 INFO L225 Difference]: With dead ends: 18093 [2021-06-05 04:07:01,511 INFO L226 Difference]: Without dead ends: 18089 [2021-06-05 04:07:01,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:01,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-06-05 04:07:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-06-05 04:07:01,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.94990984899707) internal successors, (52355), 17748 states have internal predecessors, (52355), 0 states have call successors, (0), 0 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 04:07:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-06-05 04:07:01,749 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-06-05 04:07:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:01,749 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-06-05 04:07:01,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-06-05 04:07:01,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:01,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:01,762 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:01,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3065,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:01,963 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:01,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:01,963 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-06-05 04:07:01,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:01,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223494197] [2021-06-05 04:07:01,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:02,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223494197] [2021-06-05 04:07:02,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223494197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728802179] [2021-06-05 04:07:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:02,050 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 04:07:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728802179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-06-05 04:07:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293486560] [2021-06-05 04:07:02,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:07:02,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:02,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:07:02,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:07:02,087 INFO L87 Difference]: Start difference. First operand 17749 states and 52355 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:02,277 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-06-05 04:07:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:02,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:07:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:02,298 INFO L225 Difference]: With dead ends: 18102 [2021-06-05 04:07:02,298 INFO L226 Difference]: Without dead ends: 18096 [2021-06-05 04:07:02,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:07:02,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-06-05 04:07:02,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-06-05 04:07:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.948388550822628) internal successors, (52328), 17748 states have internal predecessors, (52328), 0 states have call successors, (0), 0 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 04:07:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-06-05 04:07:02,537 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-06-05 04:07:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:02,537 INFO L482 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-06-05 04:07:02,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:02,537 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-06-05 04:07:02,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:02,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:02,550 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:02,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3066 [2021-06-05 04:07:02,751 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:02,751 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-06-05 04:07:02,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:02,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600177122] [2021-06-05 04:07:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:02,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:02,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600177122] [2021-06-05 04:07:02,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600177122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053708793] [2021-06-05 04:07:02,829 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:02,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:07:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:02,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:02,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:02,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053708793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:02,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:02,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:07:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971616963] [2021-06-05 04:07:02,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:07:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:07:02,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:07:02,893 INFO L87 Difference]: Start difference. First operand 17749 states and 52328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:03,087 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-06-05 04:07:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:03,111 INFO L225 Difference]: With dead ends: 20612 [2021-06-05 04:07:03,111 INFO L226 Difference]: Without dead ends: 20604 [2021-06-05 04:07:03,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 133.0ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:07:03,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-06-05 04:07:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-06-05 04:07:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17773 states, 17772 states have (on average 2.9481769074949358) internal successors, (52395), 17772 states have internal predecessors, (52395), 0 states have call successors, (0), 0 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 04:07:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-06-05 04:07:03,421 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-06-05 04:07:03,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:03,422 INFO L482 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-06-05 04:07:03,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:03,422 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-06-05 04:07:03,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:03,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:03,436 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:03,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3067 [2021-06-05 04:07:03,637 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-06-05 04:07:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:03,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804909001] [2021-06-05 04:07:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:03,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:03,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804909001] [2021-06-05 04:07:03,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804909001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125582579] [2021-06-05 04:07:03,708 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:03,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:03,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125582579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:03,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:03,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:07:03,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247995000] [2021-06-05 04:07:03,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:07:03,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:07:03,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:07:03,769 INFO L87 Difference]: Start difference. First operand 17773 states and 52395 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:03,978 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-06-05 04:07:03,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:07:03,978 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:04,002 INFO L225 Difference]: With dead ends: 20639 [2021-06-05 04:07:04,003 INFO L226 Difference]: Without dead ends: 20629 [2021-06-05 04:07:04,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:07:04,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-06-05 04:07:04,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-06-05 04:07:04,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17895 states, 17894 states have (on average 2.948418464289706) internal successors, (52759), 17894 states have internal predecessors, (52759), 0 states have call successors, (0), 0 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 04:07:04,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-06-05 04:07:04,255 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-06-05 04:07:04,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:04,255 INFO L482 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-06-05 04:07:04,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-06-05 04:07:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:04,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:04,268 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:04,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3068,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:04,469 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:04,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:04,469 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-06-05 04:07:04,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:04,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195882114] [2021-06-05 04:07:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:04,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:04,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195882114] [2021-06-05 04:07:04,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195882114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:04,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859497255] [2021-06-05 04:07:04,545 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:04,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:04,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:04,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:04,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:04,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859497255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:04,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:04,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-06-05 04:07:04,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064252527] [2021-06-05 04:07:04,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:07:04,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:04,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:07:04,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:07:04,608 INFO L87 Difference]: Start difference. First operand 17895 states and 52759 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:04,857 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-06-05 04:07:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:04,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:04,882 INFO L225 Difference]: With dead ends: 20525 [2021-06-05 04:07:04,882 INFO L226 Difference]: Without dead ends: 20513 [2021-06-05 04:07:04,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-06-05 04:07:05,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-06-05 04:07:05,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 17902 states have (on average 2.948218076192604) internal successors, (52779), 17902 states have internal predecessors, (52779), 0 states have call successors, (0), 0 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 04:07:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-06-05 04:07:05,132 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-06-05 04:07:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:05,132 INFO L482 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-06-05 04:07:05,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-06-05 04:07:05,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:05,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:05,146 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:05,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3069,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:05,346 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:05,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:05,347 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-06-05 04:07:05,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:05,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755768268] [2021-06-05 04:07:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:05,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:05,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:05,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755768268] [2021-06-05 04:07:05,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755768268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:05,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805954375] [2021-06-05 04:07:05,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:05,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:05,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:05,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:05,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805954375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:05,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:05,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:07:05,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692568145] [2021-06-05 04:07:05,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:05,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:05,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:05,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:05,497 INFO L87 Difference]: Start difference. First operand 17903 states and 52779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:05,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:05,763 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-06-05 04:07:05,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:07:05,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:05,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:05,787 INFO L225 Difference]: With dead ends: 20558 [2021-06-05 04:07:05,788 INFO L226 Difference]: Without dead ends: 20544 [2021-06-05 04:07:05,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 201.3ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:07:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-06-05 04:07:06,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-06-05 04:07:06,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17922 states, 17921 states have (on average 2.9477707717203283) internal successors, (52827), 17921 states have internal predecessors, (52827), 0 states have call successors, (0), 0 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 04:07:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-06-05 04:07:06,049 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-06-05 04:07:06,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:06,049 INFO L482 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-06-05 04:07:06,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-06-05 04:07:06,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:06,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:06,063 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:06,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3070 [2021-06-05 04:07:06,264 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:06,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:06,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-06-05 04:07:06,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:06,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989799096] [2021-06-05 04:07:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:06,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:06,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989799096] [2021-06-05 04:07:06,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989799096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:06,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624619035] [2021-06-05 04:07:06,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:06,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:06,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:06,416 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:06,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624619035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:06,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:06,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-06-05 04:07:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392367894] [2021-06-05 04:07:06,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:06,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:06,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:06,417 INFO L87 Difference]: Start difference. First operand 17922 states and 52827 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:06,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:06,768 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-06-05 04:07:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:07:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:06,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:06,791 INFO L225 Difference]: With dead ends: 19475 [2021-06-05 04:07:06,792 INFO L226 Difference]: Without dead ends: 19459 [2021-06-05 04:07:06,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:07:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-06-05 04:07:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-06-05 04:07:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9474418345143114) internal successors, (52827), 17923 states have internal predecessors, (52827), 0 states have call successors, (0), 0 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 04:07:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-06-05 04:07:07,076 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-06-05 04:07:07,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:07,077 INFO L482 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-06-05 04:07:07,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-06-05 04:07:07,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:07,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:07,091 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:07,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3071,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:07,291 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:07,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:07,292 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-06-05 04:07:07,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:07,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001236521] [2021-06-05 04:07:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:07,373 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:07,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:07,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001236521] [2021-06-05 04:07:07,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001236521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:07,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659675405] [2021-06-05 04:07:07,373 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:07,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:07:07,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:07,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:07,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:07,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659675405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:07,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:07,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-06-05 04:07:07,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791530299] [2021-06-05 04:07:07,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:07,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:07,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:07,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:07,472 INFO L87 Difference]: Start difference. First operand 17924 states and 52827 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:07,677 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-06-05 04:07:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:07,677 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:07,698 INFO L225 Difference]: With dead ends: 18184 [2021-06-05 04:07:07,698 INFO L226 Difference]: Without dead ends: 18178 [2021-06-05 04:07:07,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-06-05 04:07:07,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-06-05 04:07:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.946793084216397) internal successors, (52836), 17930 states have internal predecessors, (52836), 0 states have call successors, (0), 0 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 04:07:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-06-05 04:07:07,934 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-06-05 04:07:07,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:07,934 INFO L482 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-06-05 04:07:07,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:07,934 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-06-05 04:07:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:07,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:07,948 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:08,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3072 [2021-06-05 04:07:08,155 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:08,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:08,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-06-05 04:07:08,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:08,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826915316] [2021-06-05 04:07:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:08,240 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:08,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:08,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826915316] [2021-06-05 04:07:08,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826915316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:08,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540749667] [2021-06-05 04:07:08,241 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:08,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 04:07:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:08,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:08,311 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:08,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540749667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:08,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:08,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 04:07:08,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074605005] [2021-06-05 04:07:08,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:08,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:08,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:08,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:08,312 INFO L87 Difference]: Start difference. First operand 17931 states and 52836 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:08,529 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-06-05 04:07:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:07:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:07:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:08,550 INFO L225 Difference]: With dead ends: 18330 [2021-06-05 04:07:08,551 INFO L226 Difference]: Without dead ends: 18316 [2021-06-05 04:07:08,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 177.8ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:07:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-06-05 04:07:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-06-05 04:07:08,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.9460560080330245) internal successors, (52811), 17926 states have internal predecessors, (52811), 0 states have call successors, (0), 0 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 04:07:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-06-05 04:07:08,797 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-06-05 04:07:08,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:08,797 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-06-05 04:07:08,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-06-05 04:07:08,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:08,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:08,811 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:09,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3073,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:09,011 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:09,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:09,012 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-06-05 04:07:09,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:09,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754956985] [2021-06-05 04:07:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:09,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:09,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754956985] [2021-06-05 04:07:09,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754956985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:09,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329982766] [2021-06-05 04:07:09,078 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:09,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:09,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329982766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-06-05 04:07:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189063003] [2021-06-05 04:07:09,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:07:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:07:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:07:09,145 INFO L87 Difference]: Start difference. First operand 17927 states and 52811 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:09,347 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-06-05 04:07:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:07:09,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:09,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:09,368 INFO L225 Difference]: With dead ends: 18362 [2021-06-05 04:07:09,368 INFO L226 Difference]: Without dead ends: 18354 [2021-06-05 04:07:09,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:07:09,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-06-05 04:07:09,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-06-05 04:07:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.944828740377106) internal successors, (52789), 17926 states have internal predecessors, (52789), 0 states have call successors, (0), 0 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 04:07:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-06-05 04:07:09,613 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-06-05 04:07:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:09,613 INFO L482 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-06-05 04:07:09,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-06-05 04:07:09,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:09,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:09,628 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:09,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3074 [2021-06-05 04:07:09,828 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:09,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-06-05 04:07:09,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:09,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944861787] [2021-06-05 04:07:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:09,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:09,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944861787] [2021-06-05 04:07:09,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944861787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:09,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431687696] [2021-06-05 04:07:09,901 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:09,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:09,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:09,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:09,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:09,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431687696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:09,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:09,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-06-05 04:07:09,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741377453] [2021-06-05 04:07:09,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:09,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:09,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:09,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:09,969 INFO L87 Difference]: Start difference. First operand 17927 states and 52789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:10,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:10,217 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-06-05 04:07:10,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:07:10,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:10,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:10,237 INFO L225 Difference]: With dead ends: 18388 [2021-06-05 04:07:10,237 INFO L226 Difference]: Without dead ends: 18378 [2021-06-05 04:07:10,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:07:10,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-06-05 04:07:10,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-06-05 04:07:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9439585538410116) internal successors, (52847), 17951 states have internal predecessors, (52847), 0 states have call successors, (0), 0 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 04:07:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-06-05 04:07:10,479 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-06-05 04:07:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:10,479 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-06-05 04:07:10,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-06-05 04:07:10,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:10,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:10,492 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:10,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3075 [2021-06-05 04:07:10,693 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:10,693 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-06-05 04:07:10,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:10,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133292937] [2021-06-05 04:07:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:10,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:10,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133292937] [2021-06-05 04:07:10,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133292937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:10,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55951045] [2021-06-05 04:07:10,770 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:10,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:07:10,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:10,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:10,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55951045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:10,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:10,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-06-05 04:07:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636219438] [2021-06-05 04:07:10,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:10,885 INFO L87 Difference]: Start difference. First operand 17952 states and 52847 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:11,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:11,122 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-06-05 04:07:11,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:11,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:11,145 INFO L225 Difference]: With dead ends: 20163 [2021-06-05 04:07:11,145 INFO L226 Difference]: Without dead ends: 20151 [2021-06-05 04:07:11,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 183.5ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-06-05 04:07:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-06-05 04:07:11,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9437914322321874) internal successors, (52844), 17951 states have internal predecessors, (52844), 0 states have call successors, (0), 0 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 04:07:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-06-05 04:07:11,381 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-06-05 04:07:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:11,381 INFO L482 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-06-05 04:07:11,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-06-05 04:07:11,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:11,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:11,394 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:11,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3076 [2021-06-05 04:07:11,595 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:11,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:11,595 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-06-05 04:07:11,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:11,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461744426] [2021-06-05 04:07:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:11,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461744426] [2021-06-05 04:07:11,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461744426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610178674] [2021-06-05 04:07:11,680 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:11,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:11,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:11,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:11,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:11,748 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:11,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610178674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:11,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:11,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-06-05 04:07:11,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874346718] [2021-06-05 04:07:11,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:11,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:11,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:11,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:11,749 INFO L87 Difference]: Start difference. First operand 17952 states and 52844 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:11,999 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-06-05 04:07:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:07:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:12,025 INFO L225 Difference]: With dead ends: 20184 [2021-06-05 04:07:12,026 INFO L226 Difference]: Without dead ends: 20170 [2021-06-05 04:07:12,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:07:12,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-06-05 04:07:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-06-05 04:07:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9436745143874883) internal successors, (52889), 17967 states have internal predecessors, (52889), 0 states have call successors, (0), 0 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 04:07:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-06-05 04:07:12,270 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-06-05 04:07:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:12,270 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-06-05 04:07:12,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:12,270 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-06-05 04:07:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:12,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:12,284 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:12,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3077 [2021-06-05 04:07:12,484 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-06-05 04:07:12,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:12,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873232215] [2021-06-05 04:07:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:12,573 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:12,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:12,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873232215] [2021-06-05 04:07:12,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873232215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:12,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553127813] [2021-06-05 04:07:12,573 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:12,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:12,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:12,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553127813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:12,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:12,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-06-05 04:07:12,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936347335] [2021-06-05 04:07:12,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:12,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:12,647 INFO L87 Difference]: Start difference. First operand 17968 states and 52889 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:12,970 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-06-05 04:07:12,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 04:07:12,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 04:07:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:12,992 INFO L225 Difference]: With dead ends: 19526 [2021-06-05 04:07:12,992 INFO L226 Difference]: Without dead ends: 19510 [2021-06-05 04:07:12,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:07:13,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-06-05 04:07:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-06-05 04:07:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9435631991985307) internal successors, (52887), 17967 states have internal predecessors, (52887), 0 states have call successors, (0), 0 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 04:07:13,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-06-05 04:07:13,230 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-06-05 04:07:13,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:13,230 INFO L482 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-06-05 04:07:13,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:07:13,230 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-06-05 04:07:13,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:13,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:13,243 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:13,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3078 [2021-06-05 04:07:13,444 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:13,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:13,444 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-06-05 04:07:13,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:13,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342116626] [2021-06-05 04:07:13,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:13,523 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:13,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342116626] [2021-06-05 04:07:13,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342116626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439507921] [2021-06-05 04:07:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:13,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:07:13,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:13,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:13,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439507921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:13,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:13,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-06-05 04:07:13,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968274282] [2021-06-05 04:07:13,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:13,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:13,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:13,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:13,667 INFO L87 Difference]: Start difference. First operand 17968 states and 52887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:13,843 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-06-05 04:07:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:13,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:13,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:13,863 INFO L225 Difference]: With dead ends: 18372 [2021-06-05 04:07:13,864 INFO L226 Difference]: Without dead ends: 18368 [2021-06-05 04:07:13,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:07:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-06-05 04:07:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-06-05 04:07:14,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9450878262315068) internal successors, (53150), 18047 states have internal predecessors, (53150), 0 states have call successors, (0), 0 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 04:07:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-06-05 04:07:14,107 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-06-05 04:07:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:14,108 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-06-05 04:07:14,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-06-05 04:07:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:14,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:14,122 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:14,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3079,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:14,322 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-06-05 04:07:14,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:14,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153915543] [2021-06-05 04:07:14,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:14,400 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:14,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:14,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153915543] [2021-06-05 04:07:14,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153915543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:14,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893404544] [2021-06-05 04:07:14,401 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:14,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893404544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:14,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:14,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-06-05 04:07:14,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134716764] [2021-06-05 04:07:14,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:14,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:14,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:14,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:14,478 INFO L87 Difference]: Start difference. First operand 18048 states and 53150 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:14,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:14,698 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-06-05 04:07:14,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:07:14,699 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:14,723 INFO L225 Difference]: With dead ends: 19818 [2021-06-05 04:07:14,723 INFO L226 Difference]: Without dead ends: 19806 [2021-06-05 04:07:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 169.6ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:07:14,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-06-05 04:07:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-06-05 04:07:14,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9444228957721506) internal successors, (53138), 18047 states have internal predecessors, (53138), 0 states have call successors, (0), 0 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 04:07:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-06-05 04:07:14,976 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-06-05 04:07:14,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:14,976 INFO L482 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-06-05 04:07:14,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:14,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-06-05 04:07:14,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:14,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:14,991 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:15,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3080,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:15,191 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:15,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:15,191 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-06-05 04:07:15,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:15,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345178566] [2021-06-05 04:07:15,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:15,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345178566] [2021-06-05 04:07:15,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345178566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:15,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752146898] [2021-06-05 04:07:15,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:15,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:15,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:15,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:15,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752146898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:15,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:15,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-06-05 04:07:15,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334123880] [2021-06-05 04:07:15,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:07:15,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:15,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:07:15,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:07:15,357 INFO L87 Difference]: Start difference. First operand 18048 states and 53138 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:15,588 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-06-05 04:07:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:15,588 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:15,611 INFO L225 Difference]: With dead ends: 19833 [2021-06-05 04:07:15,611 INFO L226 Difference]: Without dead ends: 19819 [2021-06-05 04:07:15,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-06-05 04:07:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-06-05 04:07:15,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.9438786805401818) internal successors, (53190), 18068 states have internal predecessors, (53190), 0 states have call successors, (0), 0 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 04:07:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-06-05 04:07:15,862 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-06-05 04:07:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:15,862 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-06-05 04:07:15,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:15,862 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-06-05 04:07:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:15,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:15,877 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:16,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3081,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:16,078 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:16,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:16,078 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-06-05 04:07:16,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:16,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961328129] [2021-06-05 04:07:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:16,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961328129] [2021-06-05 04:07:16,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961328129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:16,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317280118] [2021-06-05 04:07:16,172 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:16,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:16,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:16,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:16,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:16,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317280118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:16,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:16,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-06-05 04:07:16,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151870166] [2021-06-05 04:07:16,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:07:16,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:16,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:07:16,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:07:16,254 INFO L87 Difference]: Start difference. First operand 18069 states and 53190 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:16,570 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-06-05 04:07:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:07:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:16,594 INFO L225 Difference]: With dead ends: 19689 [2021-06-05 04:07:16,594 INFO L226 Difference]: Without dead ends: 19673 [2021-06-05 04:07:16,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 04:07:16,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-06-05 04:07:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-06-05 04:07:16,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.943767987602391) internal successors, (53188), 18068 states have internal predecessors, (53188), 0 states have call successors, (0), 0 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 04:07:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-06-05 04:07:16,870 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-06-05 04:07:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:16,870 INFO L482 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-06-05 04:07:16,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-06-05 04:07:16,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:16,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:16,885 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:17,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3082 [2021-06-05 04:07:17,085 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:17,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-06-05 04:07:17,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:17,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266345850] [2021-06-05 04:07:17,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:17,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:17,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:17,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266345850] [2021-06-05 04:07:17,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266345850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:17,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379150873] [2021-06-05 04:07:17,166 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:17,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:17,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:17,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:17,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:17,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379150873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:17,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:17,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-06-05 04:07:17,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723978453] [2021-06-05 04:07:17,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:17,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:17,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:17,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:17,234 INFO L87 Difference]: Start difference. First operand 18069 states and 53188 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:17,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:17,373 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-06-05 04:07:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:17,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:17,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:17,394 INFO L225 Difference]: With dead ends: 18782 [2021-06-05 04:07:17,395 INFO L226 Difference]: Without dead ends: 18782 [2021-06-05 04:07:17,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:17,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-06-05 04:07:17,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-06-05 04:07:17,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9503866681189415) internal successors, (54175), 18362 states have internal predecessors, (54175), 0 states have call successors, (0), 0 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 04:07:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-06-05 04:07:17,642 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-06-05 04:07:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:17,643 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-06-05 04:07:17,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-06-05 04:07:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:17,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:17,657 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:17,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3083,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:17,858 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:17,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-06-05 04:07:17,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:17,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798596532] [2021-06-05 04:07:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798596532] [2021-06-05 04:07:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798596532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964483877] [2021-06-05 04:07:17,958 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:17,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:17,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:18,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964483877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:18,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:18,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-06-05 04:07:18,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864015352] [2021-06-05 04:07:18,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:18,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:18,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:18,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:18,050 INFO L87 Difference]: Start difference. First operand 18363 states and 54175 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:18,282 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-06-05 04:07:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:18,307 INFO L225 Difference]: With dead ends: 20117 [2021-06-05 04:07:18,307 INFO L226 Difference]: Without dead ends: 20101 [2021-06-05 04:07:18,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:07:18,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-06-05 04:07:18,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-06-05 04:07:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9502777475220565) internal successors, (54173), 18362 states have internal predecessors, (54173), 0 states have call successors, (0), 0 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 04:07:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-06-05 04:07:18,560 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-06-05 04:07:18,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:18,560 INFO L482 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-06-05 04:07:18,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-06-05 04:07:18,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:18,575 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:18,575 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:18,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3084 [2021-06-05 04:07:18,775 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:18,776 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-06-05 04:07:18,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:18,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192093207] [2021-06-05 04:07:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:18,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:18,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192093207] [2021-06-05 04:07:18,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192093207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:18,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872195466] [2021-06-05 04:07:18,859 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:18,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:07:18,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:18,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:18,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:18,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872195466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:18,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:18,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-06-05 04:07:18,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240707289] [2021-06-05 04:07:18,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:18,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:18,928 INFO L87 Difference]: Start difference. First operand 18363 states and 54173 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:19,040 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-06-05 04:07:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:07:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:19,065 INFO L225 Difference]: With dead ends: 21290 [2021-06-05 04:07:19,065 INFO L226 Difference]: Without dead ends: 21290 [2021-06-05 04:07:19,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-06-05 04:07:19,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-06-05 04:07:19,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 20832 states have (on average 2.9642857142857144) internal successors, (61752), 20832 states have internal predecessors, (61752), 0 states have call successors, (0), 0 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 04:07:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-06-05 04:07:19,358 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-06-05 04:07:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:19,358 INFO L482 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-06-05 04:07:19,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-06-05 04:07:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:19,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:19,374 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:19,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3085 [2021-06-05 04:07:19,574 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:19,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-06-05 04:07:19,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:19,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079497145] [2021-06-05 04:07:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:19,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079497145] [2021-06-05 04:07:19,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079497145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:19,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319840407] [2021-06-05 04:07:19,659 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:19,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:19,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:19,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319840407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:19,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:19,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-06-05 04:07:19,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684386985] [2021-06-05 04:07:19,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:19,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:19,726 INFO L87 Difference]: Start difference. First operand 20833 states and 61752 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:19,844 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-06-05 04:07:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:07:19,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:19,870 INFO L225 Difference]: With dead ends: 21205 [2021-06-05 04:07:19,870 INFO L226 Difference]: Without dead ends: 21205 [2021-06-05 04:07:19,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:07:19,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-06-05 04:07:20,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-06-05 04:07:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.964187989054774) internal successors, (61747), 20831 states have internal predecessors, (61747), 0 states have call successors, (0), 0 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 04:07:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-06-05 04:07:20,202 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-06-05 04:07:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:20,202 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-06-05 04:07:20,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-06-05 04:07:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:20,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:20,218 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:20,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3086,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:20,419 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:20,419 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-06-05 04:07:20,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:20,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3780078] [2021-06-05 04:07:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:20,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3780078] [2021-06-05 04:07:20,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3780078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:20,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024944793] [2021-06-05 04:07:20,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:20,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:20,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:20,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:20,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024944793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:20,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:20,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-06-05 04:07:20,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198676900] [2021-06-05 04:07:20,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:07:20,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:20,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:07:20,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:07:20,564 INFO L87 Difference]: Start difference. First operand 20832 states and 61747 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:20,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:20,758 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-06-05 04:07:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:20,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:20,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:20,783 INFO L225 Difference]: With dead ends: 21228 [2021-06-05 04:07:20,783 INFO L226 Difference]: Without dead ends: 21226 [2021-06-05 04:07:20,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:07:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-06-05 04:07:21,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-06-05 04:07:21,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.96409197830157) internal successors, (61745), 20831 states have internal predecessors, (61745), 0 states have call successors, (0), 0 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 04:07:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-06-05 04:07:21,074 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-06-05 04:07:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:21,074 INFO L482 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-06-05 04:07:21,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-06-05 04:07:21,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:21,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:21,090 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:21,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3087 [2021-06-05 04:07:21,290 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-06-05 04:07:21,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:21,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864679677] [2021-06-05 04:07:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:21,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:21,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864679677] [2021-06-05 04:07:21,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864679677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:21,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535574999] [2021-06-05 04:07:21,373 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:21,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 04:07:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:21,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:21,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:21,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535574999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:21,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:21,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-06-05 04:07:21,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292913613] [2021-06-05 04:07:21,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:21,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:21,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:21,447 INFO L87 Difference]: Start difference. First operand 20832 states and 61745 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:21,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:21,655 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-06-05 04:07:21,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:21,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:21,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:21,681 INFO L225 Difference]: With dead ends: 21234 [2021-06-05 04:07:21,681 INFO L226 Difference]: Without dead ends: 21230 [2021-06-05 04:07:21,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:07:21,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-06-05 04:07:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-06-05 04:07:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964299424184261) internal successors, (61776), 20840 states have internal predecessors, (61776), 0 states have call successors, (0), 0 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 04:07:21,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-06-05 04:07:21,974 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-06-05 04:07:21,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:21,974 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-06-05 04:07:21,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:21,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-06-05 04:07:21,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:21,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:21,990 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:22,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3088 [2021-06-05 04:07:22,190 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:22,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-06-05 04:07:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:22,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784196565] [2021-06-05 04:07:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:22,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:22,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784196565] [2021-06-05 04:07:22,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784196565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:22,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326707384] [2021-06-05 04:07:22,273 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:22,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:22,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:22,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:22,342 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:22,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326707384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:22,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:22,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-06-05 04:07:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720319471] [2021-06-05 04:07:22,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:07:22,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:22,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:07:22,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:07:22,343 INFO L87 Difference]: Start difference. First operand 20841 states and 61776 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:22,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:22,569 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-06-05 04:07:22,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:22,570 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:22,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:22,607 INFO L225 Difference]: With dead ends: 25243 [2021-06-05 04:07:22,607 INFO L226 Difference]: Without dead ends: 25237 [2021-06-05 04:07:22,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:07:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-06-05 04:07:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-06-05 04:07:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964011516314779) internal successors, (61770), 20840 states have internal predecessors, (61770), 0 states have call successors, (0), 0 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 04:07:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-06-05 04:07:23,020 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-06-05 04:07:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:23,020 INFO L482 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-06-05 04:07:23,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:23,020 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-06-05 04:07:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:23,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:23,036 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:23,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3089 [2021-06-05 04:07:23,236 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:23,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-06-05 04:07:23,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:23,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002278491] [2021-06-05 04:07:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:23,319 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:23,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002278491] [2021-06-05 04:07:23,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002278491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:23,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740862776] [2021-06-05 04:07:23,319 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 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:23,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:07:23,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:23,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740862776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-06-05 04:07:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355245207] [2021-06-05 04:07:23,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:07:23,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:07:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:07:23,401 INFO L87 Difference]: Start difference. First operand 20841 states and 61770 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:23,636 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-06-05 04:07:23,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:23,636 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:23,668 INFO L225 Difference]: With dead ends: 25260 [2021-06-05 04:07:23,669 INFO L226 Difference]: Without dead ends: 25252 [2021-06-05 04:07:23,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 172.6ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:07:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-06-05 04:07:23,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-06-05 04:07:23,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.9636302649863433) internal successors, (61848), 20869 states have internal predecessors, (61848), 0 states have call successors, (0), 0 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 04:07:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-06-05 04:07:23,992 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-06-05 04:07:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:23,992 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-06-05 04:07:23,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-06-05 04:07:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:24,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:24,009 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:24,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3090,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:24,209 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-06-05 04:07:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:24,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502519334] [2021-06-05 04:07:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:24,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502519334] [2021-06-05 04:07:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502519334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406549052] [2021-06-05 04:07:24,294 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:24,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:07:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:24,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:24,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:24,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406549052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:24,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:24,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-06-05 04:07:24,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650726634] [2021-06-05 04:07:24,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:07:24,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:07:24,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:07:24,376 INFO L87 Difference]: Start difference. First operand 20870 states and 61848 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:24,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:24,610 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-06-05 04:07:24,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:24,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:24,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:24,643 INFO L225 Difference]: With dead ends: 24954 [2021-06-05 04:07:24,643 INFO L226 Difference]: Without dead ends: 24944 [2021-06-05 04:07:24,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:07:24,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-06-05 04:07:24,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-06-05 04:07:24,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.963342757199674) internal successors, (61842), 20869 states have internal predecessors, (61842), 0 states have call successors, (0), 0 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 04:07:24,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-06-05 04:07:24,959 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-06-05 04:07:24,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:24,959 INFO L482 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-06-05 04:07:24,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:24,960 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-06-05 04:07:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:24,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:24,976 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3091,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:25,181 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-06-05 04:07:25,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:25,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070829210] [2021-06-05 04:07:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:25,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070829210] [2021-06-05 04:07:25,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070829210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:25,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505939310] [2021-06-05 04:07:25,271 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:25,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:25,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:25,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505939310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:25,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:25,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 04:07:25,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391384548] [2021-06-05 04:07:25,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:25,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:25,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:25,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:25,361 INFO L87 Difference]: Start difference. First operand 20870 states and 61842 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:25,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:25,612 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-06-05 04:07:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:25,613 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:25,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:25,645 INFO L225 Difference]: With dead ends: 24983 [2021-06-05 04:07:25,645 INFO L226 Difference]: Without dead ends: 24971 [2021-06-05 04:07:25,645 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:25,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-06-05 04:07:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-06-05 04:07:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.963130783172756) internal successors, (62125), 20966 states have internal predecessors, (62125), 0 states have call successors, (0), 0 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 04:07:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-06-05 04:07:26,078 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-06-05 04:07:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:26,078 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-06-05 04:07:26,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-06-05 04:07:26,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:26,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:26,093 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:26,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3092 [2021-06-05 04:07:26,293 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:26,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-06-05 04:07:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035791755] [2021-06-05 04:07:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:26,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035791755] [2021-06-05 04:07:26,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035791755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:26,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777634628] [2021-06-05 04:07:26,386 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 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:26,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:07:26,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:26,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:07:26,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777634628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:26,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:26,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-06-05 04:07:26,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551289186] [2021-06-05 04:07:26,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 04:07:26,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:26,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 04:07:26,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:07:26,487 INFO L87 Difference]: Start difference. First operand 20967 states and 62125 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:26,730 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-06-05 04:07:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:26,766 INFO L225 Difference]: With dead ends: 23366 [2021-06-05 04:07:26,766 INFO L226 Difference]: Without dead ends: 23352 [2021-06-05 04:07:26,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:07:26,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-06-05 04:07:27,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-06-05 04:07:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.9630353906324527) internal successors, (62123), 20966 states have internal predecessors, (62123), 0 states have call successors, (0), 0 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 04:07:27,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-06-05 04:07:27,066 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-06-05 04:07:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:27,066 INFO L482 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-06-05 04:07:27,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-06-05 04:07:27,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:27,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:27,083 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:27,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3093,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:27,283 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:27,284 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-06-05 04:07:27,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:27,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16460790] [2021-06-05 04:07:27,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:27,377 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:27,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16460790] [2021-06-05 04:07:27,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16460790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:27,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550978210] [2021-06-05 04:07:27,377 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:27,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:07:27,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 04:07:27,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:27,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550978210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:27,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:27,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-06-05 04:07:27,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094195034] [2021-06-05 04:07:27,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 04:07:27,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 04:07:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:07:27,485 INFO L87 Difference]: Start difference. First operand 20967 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:27,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:27,753 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-06-05 04:07:27,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:07:27,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:27,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:27,782 INFO L225 Difference]: With dead ends: 23400 [2021-06-05 04:07:27,782 INFO L226 Difference]: Without dead ends: 23384 [2021-06-05 04:07:27,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:07:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-06-05 04:07:28,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-06-05 04:07:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.9629594317585926) internal successors, (62154), 20977 states have internal predecessors, (62154), 0 states have call successors, (0), 0 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 04:07:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-06-05 04:07:28,080 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-06-05 04:07:28,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:28,080 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-06-05 04:07:28,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:28,080 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-06-05 04:07:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 04:07:28,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:28,097 INFO L521 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:28,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3094 [2021-06-05 04:07:28,297 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-06-05 04:07:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:28,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937371658] [2021-06-05 04:07:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:28,392 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:28,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:28,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937371658] [2021-06-05 04:07:28,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937371658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:28,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440693739] [2021-06-05 04:07:28,393 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:28,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:07:28,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:28,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 04:07:28,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:28,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440693739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:28,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:28,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-06-05 04:07:28,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39660318] [2021-06-05 04:07:28,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 04:07:28,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:28,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 04:07:28,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:07:28,514 INFO L87 Difference]: Start difference. First operand 20978 states and 62154 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:28,751 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-06-05 04:07:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:07:28,751 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 04:07:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:28,777 INFO L225 Difference]: With dead ends: 21340 [2021-06-05 04:07:28,777 INFO L226 Difference]: Without dead ends: 21331 [2021-06-05 04:07:28,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:07:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-06-05 04:07:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-06-05 04:07:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.962911760499595) internal successors, (62153), 20977 states have internal predecessors, (62153), 0 states have call successors, (0), 0 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 04:07:29,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-06-05 04:07:29,056 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-06-05 04:07:29,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:29,056 INFO L482 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-06-05 04:07:29,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:07:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-06-05 04:07:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:07:29,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:29,073 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:29,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3095 [2021-06-05 04:07:29,274 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-06-05 04:07:29,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:29,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913263827] [2021-06-05 04:07:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:29,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:29,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913263827] [2021-06-05 04:07:29,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913263827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:29,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903242141] [2021-06-05 04:07:29,337 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:29,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:07:29,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:29,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:07:29,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:29,860 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:07:29,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:29,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:07:30,709 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 313 DAG size of output: 295 [2021-06-05 04:07:30,977 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 437 [2021-06-05 04:07:31,636 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 341 [2021-06-05 04:07:32,136 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 677 [2021-06-05 04:07:32,622 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 685 [2021-06-05 04:07:33,173 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 222 [2021-06-05 04:07:33,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 358 [2021-06-05 04:07:34,153 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 426 DAG size of output: 361 [2021-06-05 04:07:34,464 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 479 [2021-06-05 04:07:34,842 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 509 [2021-06-05 04:07:35,802 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 04:07:36,761 WARN L205 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 1270 DAG size of output: 1042 [2021-06-05 04:07:37,844 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 1281 DAG size of output: 1053 [2021-06-05 04:07:38,889 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1055 DAG size of output: 1466 [2021-06-05 04:07:39,105 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 1050 DAG size of output: 1118 [2021-06-05 04:07:39,572 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 1045 DAG size of output: 1044 [2021-06-05 04:07:39,839 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 468 [2021-06-05 04:07:40,093 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 434 [2021-06-05 04:07:40,291 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 425 DAG size of output: 394 [2021-06-05 04:07:41,104 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 255 [2021-06-05 04:07:41,271 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 474 DAG size of output: 270 [2021-06-05 04:07:41,743 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 634 [2021-06-05 04:07:42,052 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 523 [2021-06-05 04:07:43,038 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 269 [2021-06-05 04:07:43,233 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 274 [2021-06-05 04:07:43,605 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 434 [2021-06-05 04:07:44,097 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 521 [2021-06-05 04:07:45,013 WARN L205 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 04:07:45,947 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 888 [2021-06-05 04:07:46,998 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 1386 DAG size of output: 895 [2021-06-05 04:07:48,136 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 897 DAG size of output: 597 [2021-06-05 04:07:48,388 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 443 [2021-06-05 04:07:48,687 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 467 [2021-06-05 04:07:49,041 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 288 DAG size of output: 279 [2021-06-05 04:07:49,744 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 386 [2021-06-05 04:07:50,098 WARN L205 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 306 [2021-06-05 04:07:50,827 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 227 [2021-06-05 04:07:51,031 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 292 [2021-06-05 04:07:51,265 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 298 [2021-06-05 04:07:52,598 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 752 DAG size of output: 373 [2021-06-05 04:07:53,075 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 04:07:53,533 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 544 [2021-06-05 04:07:54,161 WARN L205 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 550 [2021-06-05 04:07:54,683 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 630 [2021-06-05 04:07:54,835 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 238 [2021-06-05 04:07:55,458 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 331 [2021-06-05 04:07:55,585 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 222 [2021-06-05 04:07:55,932 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 301 [2021-06-05 04:07:56,087 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 04:07:56,253 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 343 [2021-06-05 04:07:56,409 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 242 [2021-06-05 04:07:57,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:07:57,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:57,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:07:57,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:07:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:07:57,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903242141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:57,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:07:57,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:07:57,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978422760] [2021-06-05 04:07:57,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:07:57,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:07:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:07:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:07:57,032 INFO L87 Difference]: Start difference. First operand 20978 states and 62153 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 04:07:57,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:07:57,425 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-06-05 04:07:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:07:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:07:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:07:57,450 INFO L225 Difference]: With dead ends: 21192 [2021-06-05 04:07:57,450 INFO L226 Difference]: Without dead ends: 21189 [2021-06-05 04:07:57,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:07:57,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-06-05 04:07:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-06-05 04:07:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21059 states, 21058 states have (on average 2.9629119574508502) internal successors, (62393), 21058 states have internal predecessors, (62393), 0 states have call successors, (0), 0 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 04:07:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-06-05 04:07:57,727 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-06-05 04:07:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:07:57,727 INFO L482 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-06-05 04:07:57,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 04:07:57,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-06-05 04:07:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:07:57,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:07:57,743 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:07:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3096,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:57,944 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:07:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:07:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-06-05 04:07:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:07:57,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66816415] [2021-06-05 04:07:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:07:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:07:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:07:58,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:07:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66816415] [2021-06-05 04:07:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66816415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:07:58,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132325210] [2021-06-05 04:07:58,006 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:07:58,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:07:58,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:07:58,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:07:58,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:07:58,430 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:07:58,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:07:58,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:07:59,472 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 380 [2021-06-05 04:07:59,704 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 396 [2021-06-05 04:07:59,938 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 518 DAG size of output: 419 [2021-06-05 04:08:00,221 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 528 DAG size of output: 428 [2021-06-05 04:08:00,955 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 339 [2021-06-05 04:08:01,686 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 399 DAG size of output: 350 [2021-06-05 04:08:01,957 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 589 [2021-06-05 04:08:02,336 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 601 [2021-06-05 04:08:02,734 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 720 DAG size of output: 611 [2021-06-05 04:08:03,249 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 624 [2021-06-05 04:08:04,126 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 04:08:05,035 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 918 [2021-06-05 04:08:06,060 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 1128 DAG size of output: 927 [2021-06-05 04:08:06,988 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 788 [2021-06-05 04:08:07,534 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 634 DAG size of output: 661 [2021-06-05 04:08:08,061 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 643 [2021-06-05 04:08:08,221 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 502 DAG size of output: 486 [2021-06-05 04:08:08,623 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 187 [2021-06-05 04:08:08,813 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 324 [2021-06-05 04:08:09,021 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 382 [2021-06-05 04:08:09,878 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 281 [2021-06-05 04:08:10,275 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 480 [2021-06-05 04:08:11,011 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 173 [2021-06-05 04:08:11,214 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 354 DAG size of output: 252 [2021-06-05 04:08:11,770 WARN L205 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 866 DAG size of output: 528 [2021-06-05 04:08:12,434 WARN L205 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 04:08:13,055 WARN L205 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 1012 DAG size of output: 622 [2021-06-05 04:08:13,836 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 1024 DAG size of output: 634 [2021-06-05 04:08:14,593 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 631 DAG size of output: 668 [2021-06-05 04:08:15,033 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 505 DAG size of output: 512 [2021-06-05 04:08:15,432 WARN L205 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 496 [2021-06-05 04:08:16,183 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 496 [2021-06-05 04:08:16,388 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 364 [2021-06-05 04:08:16,682 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 357 [2021-06-05 04:08:17,035 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 225 [2021-06-05 04:08:17,296 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 303 [2021-06-05 04:08:17,592 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 553 DAG size of output: 337 [2021-06-05 04:08:17,782 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 320 [2021-06-05 04:08:18,546 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 04:08:18,949 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 691 DAG size of output: 398 [2021-06-05 04:08:19,560 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 700 DAG size of output: 468 [2021-06-05 04:08:19,899 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 400 [2021-06-05 04:08:20,152 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 227 [2021-06-05 04:08:20,735 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 259 [2021-06-05 04:08:21,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:21,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:21,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:21,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:08:21,468 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:21,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132325210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:21,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:21,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:08:21,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804004342] [2021-06-05 04:08:21,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:08:21,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:08:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:21,469 INFO L87 Difference]: Start difference. First operand 21059 states and 62393 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:08:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:21,725 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-06-05 04:08:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:08:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:08:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:21,750 INFO L225 Difference]: With dead ends: 21285 [2021-06-05 04:08:21,750 INFO L226 Difference]: Without dead ends: 21282 [2021-06-05 04:08:21,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:21,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-06-05 04:08:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-06-05 04:08:22,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 2.9639946939548985) internal successors, (62564), 21108 states have internal predecessors, (62564), 0 states have call successors, (0), 0 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 04:08:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-06-05 04:08:22,053 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-06-05 04:08:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:22,053 INFO L482 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-06-05 04:08:22,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:08:22,053 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-06-05 04:08:22,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:08:22,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:22,069 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:22,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4419 [2021-06-05 04:08:22,270 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:22,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:22,272 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-06-05 04:08:22,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:22,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948247511] [2021-06-05 04:08:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:08:22,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:08:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948247511] [2021-06-05 04:08:22,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948247511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:22,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660898491] [2021-06-05 04:08:22,334 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:08:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:08:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:08:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:08:22,755 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:08:22,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:22,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:08:23,411 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 403 DAG size of output: 351 [2021-06-05 04:08:23,566 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 358 [2021-06-05 04:08:23,755 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 372 [2021-06-05 04:08:24,037 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 405 [2021-06-05 04:08:24,646 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 319 [2021-06-05 04:08:24,787 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 393 DAG size of output: 328 [2021-06-05 04:08:24,958 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 342 [2021-06-05 04:08:25,165 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 377 [2021-06-05 04:08:25,816 WARN L205 SmtUtils]: Spent 647.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 04:08:26,288 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 656 [2021-06-05 04:08:26,843 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 665 [2021-06-05 04:08:27,452 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 655 [2021-06-05 04:08:27,620 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 536 [2021-06-05 04:08:27,766 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 300 DAG size of output: 345 [2021-06-05 04:08:27,916 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 295 [2021-06-05 04:08:28,298 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 272 [2021-06-05 04:08:28,958 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 222 [2021-06-05 04:08:29,305 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 266 [2021-06-05 04:08:29,504 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 269 [2021-06-05 04:08:30,172 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 704 DAG size of output: 471 [2021-06-05 04:08:30,878 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 262 [2021-06-05 04:08:30,983 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 265 [2021-06-05 04:08:31,505 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 241 [2021-06-05 04:08:31,637 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 249 [2021-06-05 04:08:31,864 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 306 [2021-06-05 04:08:32,509 WARN L205 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 04:08:33,190 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 924 DAG size of output: 626 [2021-06-05 04:08:33,898 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 635 [2021-06-05 04:08:35,056 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 637 DAG size of output: 794 [2021-06-05 04:08:35,906 WARN L205 SmtUtils]: Spent 845.00 ms on a formula simplification. DAG size of input: 524 DAG size of output: 681 [2021-06-05 04:08:36,406 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 468 DAG size of output: 500 [2021-06-05 04:08:36,555 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 410 [2021-06-05 04:08:36,677 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 249 [2021-06-05 04:08:37,900 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 249 [2021-06-05 04:08:38,092 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 305 [2021-06-05 04:08:38,199 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 229 [2021-06-05 04:08:38,958 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 228 [2021-06-05 04:08:39,861 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 249 [2021-06-05 04:08:40,018 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 281 [2021-06-05 04:08:40,316 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 396 [2021-06-05 04:08:40,898 WARN L205 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 805 DAG size of output: 595 [2021-06-05 04:08:42,038 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 274 [2021-06-05 04:08:44,052 WARN L205 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 1266 DAG size of output: 944 [2021-06-05 04:08:45,344 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 1366 DAG size of output: 988 [2021-06-05 04:08:46,975 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1585 DAG size of output: 1151 [2021-06-05 04:08:48,793 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 04:08:50,608 WARN L205 SmtUtils]: Spent 1.81 s on a formula simplification. DAG size of input: 1856 DAG size of output: 1314 [2021-06-05 04:08:52,587 WARN L205 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 1862 DAG size of output: 1320 [2021-06-05 04:08:53,221 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 951 [2021-06-05 04:08:53,923 WARN L205 SmtUtils]: Spent 696.00 ms on a formula simplification. DAG size of input: 929 DAG size of output: 928 [2021-06-05 04:08:54,325 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 534 [2021-06-05 04:08:54,910 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 233 [2021-06-05 04:08:55,145 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 396 [2021-06-05 04:08:55,801 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 04:08:56,080 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 687 DAG size of output: 419 [2021-06-05 04:08:56,395 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 694 DAG size of output: 426 [2021-06-05 04:08:56,661 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 391 [2021-06-05 04:08:56,997 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 366 [2021-06-05 04:08:57,419 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 205 [2021-06-05 04:08:58,041 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 271 [2021-06-05 04:08:58,193 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 404 DAG size of output: 295 [2021-06-05 04:08:58,383 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 04:08:58,573 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 538 DAG size of output: 360 [2021-06-05 04:08:58,788 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 541 DAG size of output: 363 [2021-06-05 04:08:58,953 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 201 [2021-06-05 04:08:59,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:08:59,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:08:59,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:08:59,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:08:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:08:59,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660898491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:08:59,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:08:59,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:08:59,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679185745] [2021-06-05 04:08:59,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:08:59,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:08:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:08:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:59,105 INFO L87 Difference]: Start difference. First operand 21109 states and 62564 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:08:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:08:59,433 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-06-05 04:08:59,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:08:59,433 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:08:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:08:59,459 INFO L225 Difference]: With dead ends: 21361 [2021-06-05 04:08:59,459 INFO L226 Difference]: Without dead ends: 21358 [2021-06-05 04:08:59,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:08:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-06-05 04:08:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-06-05 04:08:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21176 states, 21175 states have (on average 2.965383707201889) internal successors, (62792), 21175 states have internal predecessors, (62792), 0 states have call successors, (0), 0 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 04:08:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-06-05 04:08:59,747 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-06-05 04:08:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:08:59,748 INFO L482 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-06-05 04:08:59,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:08:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-06-05 04:08:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:08:59,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:08:59,764 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:08:59,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5277 [2021-06-05 04:08:59,965 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:08:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:08:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-06-05 04:08:59,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:08:59,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757362710] [2021-06-05 04:08:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:08:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:00,025 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:00,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:00,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757362710] [2021-06-05 04:09:00,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757362710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:00,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304120454] [2021-06-05 04:09:00,026 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:00,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:09:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:09:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:00,446 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:00,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:00,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:01,364 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 420 DAG size of output: 360 [2021-06-05 04:09:01,543 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 443 DAG size of output: 382 [2021-06-05 04:09:01,764 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 465 DAG size of output: 404 [2021-06-05 04:09:02,034 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 416 [2021-06-05 04:09:03,143 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 325 [2021-06-05 04:09:03,303 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 343 [2021-06-05 04:09:03,559 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 465 [2021-06-05 04:09:03,877 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 585 DAG size of output: 486 [2021-06-05 04:09:04,303 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 603 DAG size of output: 498 [2021-06-05 04:09:05,054 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 04:09:05,837 WARN L205 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 950 DAG size of output: 770 [2021-06-05 04:09:06,677 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 782 [2021-06-05 04:09:07,916 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 784 DAG size of output: 877 [2021-06-05 04:09:08,415 WARN L205 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 712 [2021-06-05 04:09:08,878 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 523 [2021-06-05 04:09:09,001 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 445 DAG size of output: 283 [2021-06-05 04:09:09,642 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 514 DAG size of output: 386 [2021-06-05 04:09:09,754 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 371 [2021-06-05 04:09:10,551 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 248 [2021-06-05 04:09:10,687 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 257 [2021-06-05 04:09:11,060 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 734 DAG size of output: 546 [2021-06-05 04:09:11,516 WARN L205 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 776 DAG size of output: 588 [2021-06-05 04:09:12,389 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 04:09:13,216 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 776 [2021-06-05 04:09:14,142 WARN L205 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 994 DAG size of output: 780 [2021-06-05 04:09:14,988 WARN L205 SmtUtils]: Spent 840.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 746 [2021-06-05 04:09:15,433 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 482 DAG size of output: 554 [2021-06-05 04:09:15,787 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 481 DAG size of output: 429 [2021-06-05 04:09:17,061 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 552 DAG size of output: 258 [2021-06-05 04:09:17,206 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 434 [2021-06-05 04:09:17,318 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 310 [2021-06-05 04:09:18,115 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 338 [2021-06-05 04:09:18,224 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 288 [2021-06-05 04:09:18,980 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 347 DAG size of output: 242 [2021-06-05 04:09:19,269 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 04:09:19,602 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 808 DAG size of output: 385 [2021-06-05 04:09:19,932 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 392 [2021-06-05 04:09:20,226 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 452 [2021-06-05 04:09:20,660 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 389 DAG size of output: 308 [2021-06-05 04:09:20,801 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 264 [2021-06-05 04:09:21,361 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 04:09:21,470 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 245 [2021-06-05 04:09:21,668 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 299 [2021-06-05 04:09:22,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:22,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:22,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:22,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:22,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304120454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:22,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:22,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:09:22,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184374678] [2021-06-05 04:09:22,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:09:22,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:22,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:09:22,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:22,667 INFO L87 Difference]: Start difference. First operand 21176 states and 62792 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:09:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:23,047 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-06-05 04:09:23,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:09:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:23,073 INFO L225 Difference]: With dead ends: 21460 [2021-06-05 04:09:23,074 INFO L226 Difference]: Without dead ends: 21457 [2021-06-05 04:09:23,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-06-05 04:09:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-06-05 04:09:23,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21256 states, 21255 states have (on average 2.967254763585039) internal successors, (63069), 21255 states have internal predecessors, (63069), 0 states have call successors, (0), 0 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 04:09:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-06-05 04:09:23,361 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-06-05 04:09:23,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:23,361 INFO L482 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-06-05 04:09:23,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:09:23,361 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-06-05 04:09:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:09:23,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:23,378 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:23,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7738,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:23,578 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:23,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:23,579 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-06-05 04:09:23,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:23,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776852705] [2021-06-05 04:09:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:23,638 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:09:23,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776852705] [2021-06-05 04:09:23,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776852705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:23,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289674554] [2021-06-05 04:09:23,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:23,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:09:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:09:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:24,060 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:24,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:24,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:25,221 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 421 DAG size of output: 330 [2021-06-05 04:09:25,443 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 435 DAG size of output: 340 [2021-06-05 04:09:25,604 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 441 DAG size of output: 346 [2021-06-05 04:09:25,884 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 458 [2021-06-05 04:09:26,235 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 04:09:26,584 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 618 DAG size of output: 490 [2021-06-05 04:09:27,046 WARN L205 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 629 DAG size of output: 501 [2021-06-05 04:09:27,575 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 503 DAG size of output: 659 [2021-06-05 04:09:27,691 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 500 DAG size of output: 552 [2021-06-05 04:09:28,131 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 497 DAG size of output: 624 [2021-06-05 04:09:28,360 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 491 DAG size of output: 491 [2021-06-05 04:09:29,279 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 546 DAG size of output: 370 [2021-06-05 04:09:29,546 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 453 [2021-06-05 04:09:30,569 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 291 [2021-06-05 04:09:30,744 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 461 DAG size of output: 294 [2021-06-05 04:09:31,131 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 615 [2021-06-05 04:09:31,694 WARN L205 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 1122 DAG size of output: 703 [2021-06-05 04:09:32,329 WARN L205 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 1197 DAG size of output: 753 [2021-06-05 04:09:33,185 WARN L205 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 04:09:33,997 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 1412 DAG size of output: 864 [2021-06-05 04:09:34,873 WARN L205 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 870 [2021-06-05 04:09:35,787 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 872 DAG size of output: 996 [2021-06-05 04:09:36,122 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 236 [2021-06-05 04:09:36,586 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 258 [2021-06-05 04:09:37,550 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 814 DAG size of output: 794 [2021-06-05 04:09:38,083 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 508 DAG size of output: 519 [2021-06-05 04:09:38,572 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 410 [2021-06-05 04:09:38,750 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 220 [2021-06-05 04:09:38,938 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 183 [2021-06-05 04:09:39,129 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 394 DAG size of output: 238 [2021-06-05 04:09:39,404 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 325 DAG size of output: 344 [2021-06-05 04:09:39,847 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 462 DAG size of output: 266 [2021-06-05 04:09:40,131 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 696 DAG size of output: 386 [2021-06-05 04:09:40,621 WARN L205 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 04:09:41,064 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 863 DAG size of output: 462 [2021-06-05 04:09:41,563 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 869 DAG size of output: 469 [2021-06-05 04:09:41,988 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 413 [2021-06-05 04:09:42,319 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 385 [2021-06-05 04:09:42,479 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 299 DAG size of output: 256 [2021-06-05 04:09:43,106 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 199 [2021-06-05 04:09:43,393 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 188 [2021-06-05 04:09:44,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:09:44,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:44,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:09:44,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:09:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:09:44,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289674554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:44,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:09:44,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:09:44,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956756142] [2021-06-05 04:09:44,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:09:44,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:09:44,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:09:44,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:44,136 INFO L87 Difference]: Start difference. First operand 21256 states and 63069 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:09:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:09:44,415 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-06-05 04:09:44,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:09:44,415 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:09:44,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:09:44,442 INFO L225 Difference]: With dead ends: 21580 [2021-06-05 04:09:44,442 INFO L226 Difference]: Without dead ends: 21577 [2021-06-05 04:09:44,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 253.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:09:44,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-06-05 04:09:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-06-05 04:09:44,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 2.9702798839277356) internal successors, (63463), 21366 states have internal predecessors, (63463), 0 states have call successors, (0), 0 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 04:09:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-06-05 04:09:44,729 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-06-05 04:09:44,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:09:44,729 INFO L482 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-06-05 04:09:44,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:09:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-06-05 04:09:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:09:44,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:09:44,746 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:09:44,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8931,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:44,946 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:09:44,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:09:44,947 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-06-05 04:09:44,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:09:44,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922735324] [2021-06-05 04:09:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:09:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:09:45,007 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:09:45,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:09:45,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922735324] [2021-06-05 04:09:45,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922735324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:09:45,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097406067] [2021-06-05 04:09:45,008 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 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:09:45,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:09:45,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:09:45,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:09:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:09:45,430 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:09:45,431 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:09:45,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:09:46,420 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 278 [2021-06-05 04:09:46,577 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 04:09:46,732 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 431 DAG size of output: 299 [2021-06-05 04:09:46,920 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 446 DAG size of output: 314 [2021-06-05 04:09:47,149 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 354 [2021-06-05 04:09:47,280 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 210 [2021-06-05 04:09:48,122 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 213 [2021-06-05 04:09:48,458 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 254 [2021-06-05 04:09:48,697 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 347 [2021-06-05 04:09:49,187 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 387 [2021-06-05 04:09:49,338 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 321 [2021-06-05 04:09:49,545 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 246 [2021-06-05 04:09:50,502 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 203 [2021-06-05 04:09:50,627 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 282 DAG size of output: 206 [2021-06-05 04:09:50,811 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 265 [2021-06-05 04:09:50,989 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 282 [2021-06-05 04:09:51,199 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 263 [2021-06-05 04:09:51,519 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 515 DAG size of output: 374 [2021-06-05 04:09:52,175 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 04:09:52,791 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 853 DAG size of output: 595 [2021-06-05 04:09:53,466 WARN L205 SmtUtils]: Spent 673.00 ms on a formula simplification. DAG size of input: 860 DAG size of output: 602 [2021-06-05 04:09:54,129 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 658 [2021-06-05 04:09:54,556 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 457 DAG size of output: 529 [2021-06-05 04:09:55,095 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 201 [2021-06-05 04:09:55,360 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 326 [2021-06-05 04:09:55,886 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 306 [2021-06-05 04:09:56,266 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 460 [2021-06-05 04:09:56,453 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 270 DAG size of output: 280 [2021-06-05 04:09:57,215 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 289 [2021-06-05 04:09:58,001 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 313 [2021-06-05 04:09:58,419 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 04:09:58,795 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 828 DAG size of output: 494 [2021-06-05 04:09:59,210 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 830 DAG size of output: 497 [2021-06-05 04:09:59,671 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 540 [2021-06-05 04:10:00,170 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 252 [2021-06-05 04:10:00,360 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 04:10:00,549 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 318 [2021-06-05 04:10:00,763 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 324 [2021-06-05 04:10:00,877 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 342 [2021-06-05 04:10:01,073 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 348 [2021-06-05 04:10:01,943 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 04:10:02,067 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 434 DAG size of output: 294 [2021-06-05 04:10:02,249 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 439 DAG size of output: 241 [2021-06-05 04:10:02,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:02,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:02,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:02,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:10:02,366 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:02,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097406067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:02,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:02,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:10:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650839969] [2021-06-05 04:10:02,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:10:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:10:02,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:02,367 INFO L87 Difference]: Start difference. First operand 21367 states and 63463 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:10:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:02,828 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-06-05 04:10:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:10:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:10:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:02,855 INFO L225 Difference]: With dead ends: 21704 [2021-06-05 04:10:02,855 INFO L226 Difference]: Without dead ends: 21701 [2021-06-05 04:10:02,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-06-05 04:10:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-06-05 04:10:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 2.973746683424103) internal successors, (63885), 21483 states have internal predecessors, (63885), 0 states have call successors, (0), 0 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 04:10:03,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-06-05 04:10:03,156 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-06-05 04:10:03,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:03,156 INFO L482 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-06-05 04:10:03,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:10:03,156 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-06-05 04:10:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:10:03,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:03,173 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:03,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9870 [2021-06-05 04:10:03,374 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:03,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:03,375 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-06-05 04:10:03,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:03,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665267900] [2021-06-05 04:10:03,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:10:03,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:03,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665267900] [2021-06-05 04:10:03,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665267900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:03,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065500916] [2021-06-05 04:10:03,438 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:03,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:10:03,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:03,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:10:03,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:03,868 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:10:03,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:03,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:10:04,055 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2021-06-05 04:10:04,746 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 429 DAG size of output: 315 [2021-06-05 04:10:04,917 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 452 DAG size of output: 339 [2021-06-05 04:10:05,530 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 425 [2021-06-05 04:10:05,958 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 445 [2021-06-05 04:10:06,338 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 04:10:06,709 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 621 DAG size of output: 466 [2021-06-05 04:10:07,231 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 636 DAG size of output: 481 [2021-06-05 04:10:07,649 WARN L205 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 611 [2021-06-05 04:10:08,129 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 605 [2021-06-05 04:10:08,308 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 296 DAG size of output: 330 [2021-06-05 04:10:08,749 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 185 [2021-06-05 04:10:09,752 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 260 [2021-06-05 04:10:09,898 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 271 [2021-06-05 04:10:10,261 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 470 DAG size of output: 386 [2021-06-05 04:10:10,746 WARN L205 SmtUtils]: Spent 472.00 ms on a formula simplification. DAG size of input: 506 DAG size of output: 423 [2021-06-05 04:10:11,851 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 263 [2021-06-05 04:10:12,053 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 286 [2021-06-05 04:10:12,345 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 444 DAG size of output: 344 [2021-06-05 04:10:12,670 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 490 DAG size of output: 380 [2021-06-05 04:10:13,413 WARN L205 SmtUtils]: Spent 740.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 662 [2021-06-05 04:10:14,397 WARN L205 SmtUtils]: Spent 980.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 744 [2021-06-05 04:10:15,744 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 1212 DAG size of output: 935 [2021-06-05 04:10:15,932 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 332 [2021-06-05 04:10:17,229 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 279 [2021-06-05 04:10:17,520 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 388 DAG size of output: 319 [2021-06-05 04:10:17,867 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 341 [2021-06-05 04:10:18,244 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 478 DAG size of output: 374 [2021-06-05 04:10:19,443 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 286 DAG size of output: 286 [2021-06-05 04:10:19,667 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 328 [2021-06-05 04:10:19,965 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 392 DAG size of output: 367 [2021-06-05 04:10:20,753 WARN L205 SmtUtils]: Spent 785.00 ms on a formula simplification. DAG size of input: 730 DAG size of output: 617 [2021-06-05 04:10:21,572 WARN L205 SmtUtils]: Spent 815.00 ms on a formula simplification. DAG size of input: 733 DAG size of output: 620 [2021-06-05 04:10:24,035 WARN L205 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 04:10:26,464 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 1662 DAG size of output: 1295 [2021-06-05 04:10:29,144 WARN L205 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 1669 DAG size of output: 1302 [2021-06-05 04:10:32,384 WARN L205 SmtUtils]: Spent 3.23 s on a formula simplification. DAG size of input: 1304 DAG size of output: 1641 [2021-06-05 04:10:33,190 WARN L205 SmtUtils]: Spent 638.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 518 [2021-06-05 04:10:33,320 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 358 [2021-06-05 04:10:34,391 WARN L205 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 632 DAG size of output: 526 [2021-06-05 04:10:34,619 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 338 [2021-06-05 04:10:34,766 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 285 DAG size of output: 248 [2021-06-05 04:10:35,239 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 225 [2021-06-05 04:10:35,459 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 04:10:35,664 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 617 DAG size of output: 295 [2021-06-05 04:10:35,876 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 297 [2021-06-05 04:10:36,672 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 972 DAG size of output: 470 [2021-06-05 04:10:37,087 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 293 [2021-06-05 04:10:37,682 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 04:10:37,802 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 291 [2021-06-05 04:10:37,940 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 295 [2021-06-05 04:10:38,095 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 297 DAG size of output: 249 [2021-06-05 04:10:38,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:10:38,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:38,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:10:38,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:10:38,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:10:38,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065500916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:38,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:10:38,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:10:38,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722308790] [2021-06-05 04:10:38,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:10:38,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:10:38,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:10:38,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:38,645 INFO L87 Difference]: Start difference. First operand 21484 states and 63885 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:10:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:10:39,074 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-06-05 04:10:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:10:39,075 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:10:39,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:10:39,101 INFO L225 Difference]: With dead ends: 21935 [2021-06-05 04:10:39,102 INFO L226 Difference]: Without dead ends: 21932 [2021-06-05 04:10:39,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:10:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-06-05 04:10:39,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-06-05 04:10:39,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 2.9790399852588907) internal successors, (64669), 21708 states have internal predecessors, (64669), 0 states have call successors, (0), 0 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 04:10:39,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-06-05 04:10:39,493 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-06-05 04:10:39,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:10:39,494 INFO L482 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-06-05 04:10:39,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:10:39,494 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-06-05 04:10:39,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:10:39,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:10:39,509 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:10:39,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11112 [2021-06-05 04:10:39,710 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:10:39,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:10:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-06-05 04:10:39,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:10:39,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851167092] [2021-06-05 04:10:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:10:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:10:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:10:39,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:10:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851167092] [2021-06-05 04:10:39,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851167092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:10:39,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061355129] [2021-06-05 04:10:39,777 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 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:10:39,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:10:39,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:10:39,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:10:39,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:10:40,198 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:10:40,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:10:40,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:10:41,394 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 499 DAG size of output: 350 [2021-06-05 04:10:41,598 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 519 DAG size of output: 370 [2021-06-05 04:10:41,890 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 04:10:42,129 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 387 [2021-06-05 04:10:42,399 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 548 DAG size of output: 396 [2021-06-05 04:10:42,653 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 404 [2021-06-05 04:10:43,653 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 269 [2021-06-05 04:10:44,126 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 327 [2021-06-05 04:10:44,259 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 336 [2021-06-05 04:10:44,539 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 605 DAG size of output: 522 [2021-06-05 04:10:44,957 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 706 [2021-06-05 04:10:45,122 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 398 [2021-06-05 04:10:45,334 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 429 [2021-06-05 04:10:45,511 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 355 [2021-06-05 04:10:46,423 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 464 DAG size of output: 277 [2021-06-05 04:10:46,570 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 484 DAG size of output: 289 [2021-06-05 04:10:46,775 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 583 DAG size of output: 342 [2021-06-05 04:10:47,723 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 532 [2021-06-05 04:10:48,205 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 560 [2021-06-05 04:10:49,268 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1676 DAG size of output: 1187 [2021-06-05 04:10:50,509 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 04:10:51,706 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 1712 DAG size of output: 1211 [2021-06-05 04:10:53,118 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1718 DAG size of output: 1220 [2021-06-05 04:10:55,020 WARN L205 SmtUtils]: Spent 1.89 s on a formula simplification. DAG size of input: 1222 DAG size of output: 1489 [2021-06-05 04:10:57,344 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 1124 DAG size of output: 1154 [2021-06-05 04:10:58,164 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 744 DAG size of output: 817 [2021-06-05 04:10:58,955 WARN L205 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 534 [2021-06-05 04:10:59,499 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 407 DAG size of output: 495 [2021-06-05 04:10:59,849 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 423 [2021-06-05 04:11:00,089 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 268 DAG size of output: 325 [2021-06-05 04:11:00,380 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 325 [2021-06-05 04:11:00,510 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 225 [2021-06-05 04:11:01,139 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 308 DAG size of output: 226 [2021-06-05 04:11:01,974 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 455 DAG size of output: 323 [2021-06-05 04:11:03,223 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 291 [2021-06-05 04:11:03,709 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 706 DAG size of output: 519 [2021-06-05 04:11:03,961 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 336 [2021-06-05 04:11:05,277 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 227 [2021-06-05 04:11:06,002 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 290 [2021-06-05 04:11:06,438 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 395 [2021-06-05 04:11:06,694 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 302 [2021-06-05 04:11:07,655 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 214 [2021-06-05 04:11:07,851 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 262 [2021-06-05 04:11:08,659 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 221 [2021-06-05 04:11:08,996 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 277 [2021-06-05 04:11:09,445 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 443 [2021-06-05 04:11:10,347 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 890 DAG size of output: 689 [2021-06-05 04:11:11,969 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 1320 DAG size of output: 996 [2021-06-05 04:11:13,642 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 1342 DAG size of output: 1007 [2021-06-05 04:11:15,690 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 1463 DAG size of output: 1096 [2021-06-05 04:11:17,840 WARN L205 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 1605 DAG size of output: 1168 [2021-06-05 04:11:20,721 WARN L205 SmtUtils]: Spent 2.87 s on a formula simplification. DAG size of input: 1995 DAG size of output: 1476 [2021-06-05 04:11:24,344 WARN L205 SmtUtils]: Spent 3.61 s on a formula simplification. DAG size of input: 2414 DAG size of output: 1726 [2021-06-05 04:11:28,878 WARN L205 SmtUtils]: Spent 4.52 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 04:11:33,416 WARN L205 SmtUtils]: Spent 4.53 s on a formula simplification. DAG size of input: 2846 DAG size of output: 1951 [2021-06-05 04:11:38,320 WARN L205 SmtUtils]: Spent 4.90 s on a formula simplification. DAG size of input: 2852 DAG size of output: 1957 [2021-06-05 04:11:44,692 WARN L205 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 1959 DAG size of output: 2569 [2021-06-05 04:11:45,592 WARN L205 SmtUtils]: Spent 890.00 ms on a formula simplification. DAG size of input: 1698 DAG size of output: 808 [2021-06-05 04:11:46,033 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 452 [2021-06-05 04:11:46,630 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 232 [2021-06-05 04:11:46,917 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 682 DAG size of output: 377 [2021-06-05 04:11:48,138 WARN L205 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 04:11:49,380 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 1785 DAG size of output: 947 [2021-06-05 04:11:50,701 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 1790 DAG size of output: 952 [2021-06-05 04:11:51,205 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 676 DAG size of output: 433 [2021-06-05 04:11:52,404 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 378 [2021-06-05 04:11:53,085 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 04:11:53,222 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 255 [2021-06-05 04:11:53,374 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 259 [2021-06-05 04:11:53,521 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 261 DAG size of output: 257 [2021-06-05 04:11:53,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:11:53,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:53,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:11:53,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:11:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:11:53,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061355129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:53,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:11:53,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:11:53,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195438230] [2021-06-05 04:11:53,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:11:53,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:11:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:11:53,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:53,814 INFO L87 Difference]: Start difference. First operand 21709 states and 64669 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:11:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:11:54,160 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-06-05 04:11:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:11:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:11:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:11:54,190 INFO L225 Difference]: With dead ends: 22176 [2021-06-05 04:11:54,190 INFO L226 Difference]: Without dead ends: 22173 [2021-06-05 04:11:54,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:11:54,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-06-05 04:11:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-06-05 04:11:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21946 states, 21945 states have (on average 2.983732057416268) internal successors, (65478), 21945 states have internal predecessors, (65478), 0 states have call successors, (0), 0 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 04:11:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-06-05 04:11:54,518 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-06-05 04:11:54,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:11:54,519 INFO L482 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-06-05 04:11:54,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:11:54,519 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-06-05 04:11:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:11:54,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:11:54,537 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:11:54,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12515 [2021-06-05 04:11:54,738 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:11:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:11:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-06-05 04:11:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:11:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640594475] [2021-06-05 04:11:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:11:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:11:54,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:11:54,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640594475] [2021-06-05 04:11:54,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640594475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:11:54,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494844631] [2021-06-05 04:11:54,801 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:11:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:11:54,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:11:54,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:11:55,230 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:11:55,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:11:55,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:11:55,788 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 277 DAG size of output: 218 [2021-06-05 04:11:56,388 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 167 [2021-06-05 04:11:56,513 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 254 [2021-06-05 04:11:56,667 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 274 [2021-06-05 04:11:56,929 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 04:11:57,189 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 335 [2021-06-05 04:11:57,503 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 351 [2021-06-05 04:11:58,106 WARN L205 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 422 [2021-06-05 04:11:58,967 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 197 [2021-06-05 04:11:59,094 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 200 [2021-06-05 04:11:59,253 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 273 DAG size of output: 213 [2021-06-05 04:11:59,449 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 234 [2021-06-05 04:12:00,174 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 242 [2021-06-05 04:12:00,502 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 330 [2021-06-05 04:12:00,735 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 370 [2021-06-05 04:12:01,161 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 369 [2021-06-05 04:12:01,870 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 241 [2021-06-05 04:12:02,050 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 246 [2021-06-05 04:12:02,639 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 184 [2021-06-05 04:12:02,886 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 234 [2021-06-05 04:12:03,504 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 240 [2021-06-05 04:12:03,772 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 332 [2021-06-05 04:12:04,152 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 401 [2021-06-05 04:12:04,582 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 461 [2021-06-05 04:12:05,136 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 515 [2021-06-05 04:12:06,109 WARN L205 SmtUtils]: Spent 968.00 ms on a formula simplification. DAG size of input: 847 DAG size of output: 607 [2021-06-05 04:12:07,278 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 901 DAG size of output: 655 [2021-06-05 04:12:08,873 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 04:12:10,471 WARN L205 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 1179 DAG size of output: 795 [2021-06-05 04:12:12,253 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 1190 DAG size of output: 806 [2021-06-05 04:12:13,439 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 804 DAG size of output: 823 [2021-06-05 04:12:14,119 WARN L205 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 637 [2021-06-05 04:12:14,924 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 532 DAG size of output: 651 [2021-06-05 04:12:15,432 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 488 [2021-06-05 04:12:15,754 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 402 DAG size of output: 271 [2021-06-05 04:12:15,966 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 332 DAG size of output: 307 [2021-06-05 04:12:16,447 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 360 [2021-06-05 04:12:16,860 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 386 DAG size of output: 468 [2021-06-05 04:12:17,334 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 383 DAG size of output: 266 [2021-06-05 04:12:17,471 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 220 [2021-06-05 04:12:17,839 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 332 [2021-06-05 04:12:18,330 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 516 [2021-06-05 04:12:18,939 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 935 DAG size of output: 579 [2021-06-05 04:12:19,171 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 246 [2021-06-05 04:12:19,369 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 204 [2021-06-05 04:12:20,320 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2021-06-05 04:12:21,047 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 249 [2021-06-05 04:12:21,246 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 258 [2021-06-05 04:12:22,049 WARN L205 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 04:12:22,803 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 684 [2021-06-05 04:12:23,908 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 1143 DAG size of output: 758 [2021-06-05 04:12:24,379 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 437 [2021-06-05 04:12:24,694 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 433 DAG size of output: 377 [2021-06-05 04:12:25,264 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 379 DAG size of output: 242 [2021-06-05 04:12:25,638 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 04:12:26,013 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 479 [2021-06-05 04:12:26,426 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 481 [2021-06-05 04:12:26,885 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 483 DAG size of output: 569 [2021-06-05 04:12:27,159 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 475 DAG size of output: 394 [2021-06-05 04:12:27,284 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 260 [2021-06-05 04:12:27,597 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 320 [2021-06-05 04:12:27,888 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 422 DAG size of output: 204 [2021-06-05 04:12:28,363 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 04:12:28,521 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 560 DAG size of output: 246 [2021-06-05 04:12:28,674 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 564 DAG size of output: 250 [2021-06-05 04:12:28,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:28,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:28,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:28,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:12:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:28,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494844631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:28,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:28,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:12:28,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218220504] [2021-06-05 04:12:28,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:12:28,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:28,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:12:28,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:28,879 INFO L87 Difference]: Start difference. First operand 21946 states and 65478 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:12:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:29,251 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-06-05 04:12:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:12:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:12:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:29,280 INFO L225 Difference]: With dead ends: 23670 [2021-06-05 04:12:29,281 INFO L226 Difference]: Without dead ends: 23667 [2021-06-05 04:12:29,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-06-05 04:12:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-06-05 04:12:29,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 2.99181236673774) internal successors, (70158), 23450 states have internal predecessors, (70158), 0 states have call successors, (0), 0 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 04:12:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-06-05 04:12:29,599 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-06-05 04:12:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:29,599 INFO L482 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-06-05 04:12:29,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:12:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-06-05 04:12:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:29,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:29,618 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:29,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15472,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:29,819 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:29,819 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-06-05 04:12:29,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:29,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52538913] [2021-06-05 04:12:29,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:29,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52538913] [2021-06-05 04:12:29,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52538913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:29,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459840146] [2021-06-05 04:12:29,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:29,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:12:29,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:12:29,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:30,308 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:12:30,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:30,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:12:31,021 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 04:12:31,135 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 336 DAG size of output: 276 [2021-06-05 04:12:31,273 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 291 [2021-06-05 04:12:31,565 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 288 [2021-06-05 04:12:31,703 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 282 [2021-06-05 04:12:31,900 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 254 [2021-06-05 04:12:32,818 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 178 [2021-06-05 04:12:32,970 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 198 [2021-06-05 04:12:33,234 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 271 [2021-06-05 04:12:33,676 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 381 DAG size of output: 315 [2021-06-05 04:12:34,064 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 341 [2021-06-05 04:12:34,493 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 369 [2021-06-05 04:12:35,058 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 458 DAG size of output: 376 [2021-06-05 04:12:35,663 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 492 DAG size of output: 399 [2021-06-05 04:12:35,856 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 223 [2021-06-05 04:12:37,364 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 240 [2021-06-05 04:12:37,614 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 493 DAG size of output: 306 [2021-06-05 04:12:37,940 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 545 DAG size of output: 356 [2021-06-05 04:12:38,408 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 619 DAG size of output: 423 [2021-06-05 04:12:38,896 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 626 DAG size of output: 430 [2021-06-05 04:12:39,496 WARN L205 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 466 [2021-06-05 04:12:40,242 WARN L205 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 709 DAG size of output: 496 [2021-06-05 04:12:41,641 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 1004 DAG size of output: 698 [2021-06-05 04:12:43,193 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 04:12:44,805 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 1052 DAG size of output: 715 [2021-06-05 04:12:46,539 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 1059 DAG size of output: 722 [2021-06-05 04:12:47,347 WARN L205 SmtUtils]: Spent 803.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 433 [2021-06-05 04:12:47,748 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 408 DAG size of output: 342 [2021-06-05 04:12:47,967 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 283 DAG size of output: 332 [2021-06-05 04:12:48,268 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 238 [2021-06-05 04:12:48,889 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 04:12:49,019 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 231 [2021-06-05 04:12:49,153 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 374 DAG size of output: 231 [2021-06-05 04:12:49,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:12:49,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:49,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:12:49,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:12:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:12:49,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459840146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:49,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:12:49,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:12:49,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201979386] [2021-06-05 04:12:49,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:12:49,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:12:49,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:12:49,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:49,638 INFO L87 Difference]: Start difference. First operand 23451 states and 70158 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:12:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:12:49,949 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-06-05 04:12:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:12:49,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:12:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:12:49,988 INFO L225 Difference]: With dead ends: 29480 [2021-06-05 04:12:49,989 INFO L226 Difference]: Without dead ends: 29477 [2021-06-05 04:12:49,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 261.4ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:12:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-06-05 04:12:50,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-06-05 04:12:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 2.995830200287101) internal successors, (87652), 29258 states have internal predecessors, (87652), 0 states have call successors, (0), 0 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 04:12:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-06-05 04:12:50,473 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-06-05 04:12:50,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:12:50,473 INFO L482 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-06-05 04:12:50,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:12:50,473 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-06-05 04:12:50,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 04:12:50,497 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:12:50,497 INFO L521 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:12:50,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16711,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:50,697 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:12:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:12:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-06-05 04:12:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:12:50,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902120129] [2021-06-05 04:12:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:12:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:12:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:12:50,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:12:50,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902120129] [2021-06-05 04:12:50,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902120129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:12:50,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186234817] [2021-06-05 04:12:50,780 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:12:50,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:12:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:12:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 04:12:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:12:51,211 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-06-05 04:12:51,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:12:51,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-06-05 04:12:51,812 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 343 [2021-06-05 04:12:51,954 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 351 [2021-06-05 04:12:52,577 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 04:12:53,009 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 614 DAG size of output: 559 [2021-06-05 04:12:53,547 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 309 [2021-06-05 04:12:54,164 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 336 [2021-06-05 04:12:54,538 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 525 [2021-06-05 04:12:55,220 WARN L205 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 946 [2021-06-05 04:12:55,794 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 04:12:55,923 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 370 [2021-06-05 04:12:56,805 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 665 DAG size of output: 595 [2021-06-05 04:12:57,539 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 438 DAG size of output: 400 [2021-06-05 04:12:57,705 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 414 [2021-06-05 04:12:57,999 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 117 [2021-06-05 04:12:58,501 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 390 DAG size of output: 353 [2021-06-05 04:12:58,627 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 369 [2021-06-05 04:12:58,984 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 749 DAG size of output: 666 [2021-06-05 04:12:59,740 WARN L205 SmtUtils]: Spent 752.00 ms on a formula simplification. DAG size of input: 1296 DAG size of output: 1127 [2021-06-05 04:13:01,489 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 04:13:03,235 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 2221 DAG size of output: 1934 [2021-06-05 04:13:05,330 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 2236 DAG size of output: 1949 [2021-06-05 04:13:06,426 WARN L205 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 1943 DAG size of output: 1870 [2021-06-05 04:13:06,881 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 953 DAG size of output: 1006 [2021-06-05 04:13:07,819 WARN L205 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1093 [2021-06-05 04:13:08,503 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 888 DAG size of output: 792 [2021-06-05 04:13:08,781 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 766 DAG size of output: 748 [2021-06-05 04:13:09,099 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 450 [2021-06-05 04:13:09,235 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 329 [2021-06-05 04:13:09,838 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 293 DAG size of output: 344 [2021-06-05 04:13:09,948 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 275 DAG size of output: 278 [2021-06-05 04:13:10,691 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 317 [2021-06-05 04:13:10,948 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 556 DAG size of output: 335 [2021-06-05 04:13:12,066 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 450 DAG size of output: 267 [2021-06-05 04:13:12,443 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 880 DAG size of output: 518 [2021-06-05 04:13:12,973 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 550 [2021-06-05 04:13:13,671 WARN L205 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 1111 DAG size of output: 698 [2021-06-05 04:13:14,558 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 1185 DAG size of output: 735 [2021-06-05 04:13:14,818 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1023 [2021-06-05 04:13:15,320 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 721 [2021-06-05 04:13:15,534 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 377 DAG size of output: 395 [2021-06-05 04:13:15,702 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 361 [2021-06-05 04:13:15,917 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 342 DAG size of output: 383 [2021-06-05 04:13:16,463 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 224 [2021-06-05 04:13:16,677 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 456 DAG size of output: 283 [2021-06-05 04:13:16,831 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 485 DAG size of output: 290 [2021-06-05 04:13:16,962 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 334 DAG size of output: 327 [2021-06-05 04:13:17,807 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 394 [2021-06-05 04:13:18,167 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 895 DAG size of output: 523 [2021-06-05 04:13:18,579 WARN L205 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 513 DAG size of output: 598 [2021-06-05 04:13:18,846 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 486 DAG size of output: 497 [2021-06-05 04:13:18,996 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 317 DAG size of output: 310 [2021-06-05 04:13:19,107 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 307 DAG size of output: 328 [2021-06-05 04:13:20,101 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 600 DAG size of output: 342 [2021-06-05 04:13:20,774 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 662 [2021-06-05 04:13:22,479 WARN L205 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 04:13:24,177 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 2272 DAG size of output: 1239 [2021-06-05 04:13:26,276 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 2280 DAG size of output: 1250 [2021-06-05 04:13:27,449 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1141 DAG size of output: 1073 [2021-06-05 04:13:28,061 WARN L205 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 1038 DAG size of output: 977 [2021-06-05 04:13:28,241 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 437 [2021-06-05 04:13:29,854 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 344 [2021-06-05 04:13:30,127 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 404 [2021-06-05 04:13:30,472 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 425 [2021-06-05 04:13:30,976 WARN L205 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 04:13:31,499 WARN L205 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-06-05 04:13:32,071 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 547 [2021-06-05 04:13:33,073 WARN L205 SmtUtils]: Spent 998.00 ms on a formula simplification. DAG size of input: 549 DAG size of output: 644 [2021-06-05 04:13:33,908 WARN L205 SmtUtils]: Spent 831.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 503 [2021-06-05 04:13:34,811 WARN L205 SmtUtils]: Spent 898.00 ms on a formula simplification. DAG size of input: 466 DAG size of output: 558 [2021-06-05 04:13:35,054 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 366 DAG size of output: 342 [2021-06-05 04:13:35,309 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 288 [2021-06-05 04:13:36,338 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 405 DAG size of output: 322 [2021-06-05 04:13:36,548 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 304 [2021-06-05 04:13:36,711 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 255 [2021-06-05 04:13:37,457 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 187 [2021-06-05 04:13:37,782 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 684 DAG size of output: 420 [2021-06-05 04:13:38,547 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 494 [2021-06-05 04:13:39,076 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 04:13:39,577 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 973 DAG size of output: 581 [2021-06-05 04:13:40,126 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 975 DAG size of output: 581 [2021-06-05 04:13:40,493 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 515 [2021-06-05 04:13:40,798 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 351 [2021-06-05 04:13:41,400 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 378 DAG size of output: 228 [2021-06-05 04:13:41,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:13:41,609 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:13:41,609 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:13:41,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-06-05 04:13:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:41,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186234817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:41,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:41,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-06-05 04:13:41,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522807601] [2021-06-05 04:13:41,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 04:13:41,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 04:13:41,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:41,615 INFO L87 Difference]: Start difference. First operand 29259 states and 87652 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:13:42,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:42,004 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-06-05 04:13:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:13:42,005 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 04:13:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:42,054 INFO L225 Difference]: With dead ends: 34712 [2021-06-05 04:13:42,054 INFO L226 Difference]: Without dead ends: 34709 [2021-06-05 04:13:42,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-06-05 04:13:42,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-06-05 04:13:42,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34499 states, 34498 states have (on average 2.997362165922662) internal successors, (103403), 34498 states have internal predecessors, (103403), 0 states have call successors, (0), 0 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 04:13:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-06-05 04:13:42,577 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-06-05 04:13:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:42,578 INFO L482 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-06-05 04:13:42,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:13:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-06-05 04:13:42,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:42,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:42,608 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:42,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17630,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:42,809 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:42,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:42,809 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-06-05 04:13:42,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:42,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298040353] [2021-06-05 04:13:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:42,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298040353] [2021-06-05 04:13:42,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298040353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:42,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487368822] [2021-06-05 04:13:42,916 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:42,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:42,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:42,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:42,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:42,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487368822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:42,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:42,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 04:13:42,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533986423] [2021-06-05 04:13:42,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:13:42,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:42,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:13:42,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:42,989 INFO L87 Difference]: Start difference. First operand 34499 states and 103403 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:43,269 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-06-05 04:13:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:43,318 INFO L225 Difference]: With dead ends: 34720 [2021-06-05 04:13:43,318 INFO L226 Difference]: Without dead ends: 34720 [2021-06-05 04:13:43,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 04:13:43,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-06-05 04:13:43,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-06-05 04:13:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34459 states, 34458 states have (on average 2.9970398746299844) internal successors, (103272), 34458 states have internal predecessors, (103272), 0 states have call successors, (0), 0 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 04:13:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-06-05 04:13:43,833 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-06-05 04:13:43,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:43,833 INFO L482 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-06-05 04:13:43,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:43,834 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-06-05 04:13:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:43,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:43,864 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:44,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20196,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:44,064 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:44,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-06-05 04:13:44,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:44,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908625197] [2021-06-05 04:13:44,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:44,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908625197] [2021-06-05 04:13:44,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908625197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:44,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066757179] [2021-06-05 04:13:44,169 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:44,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:44,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:44,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066757179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:44,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:44,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-06-05 04:13:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653433731] [2021-06-05 04:13:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 04:13:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 04:13:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:13:44,237 INFO L87 Difference]: Start difference. First operand 34459 states and 103272 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:44,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:44,726 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-06-05 04:13:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 04:13:44,727 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:44,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:44,777 INFO L225 Difference]: With dead ends: 35093 [2021-06-05 04:13:44,777 INFO L226 Difference]: Without dead ends: 35080 [2021-06-05 04:13:44,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:13:44,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-06-05 04:13:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-06-05 04:13:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996173469387755) internal successors, (103356), 34496 states have internal predecessors, (103356), 0 states have call successors, (0), 0 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 04:13:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-06-05 04:13:45,309 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-06-05 04:13:45,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:45,309 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-06-05 04:13:45,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:45,309 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-06-05 04:13:45,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:45,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:45,339 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:45,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20197 [2021-06-05 04:13:45,540 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:45,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:45,540 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-06-05 04:13:45,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:45,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130507781] [2021-06-05 04:13:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:45,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130507781] [2021-06-05 04:13:45,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130507781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:45,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689352235] [2021-06-05 04:13:45,612 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:45,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:13:45,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:45,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:45,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689352235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:45,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:45,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:45,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094397538] [2021-06-05 04:13:45,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:45,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:45,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:45,676 INFO L87 Difference]: Start difference. First operand 34497 states and 103356 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:45,904 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-06-05 04:13:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:45,905 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:45,955 INFO L225 Difference]: With dead ends: 34544 [2021-06-05 04:13:45,956 INFO L226 Difference]: Without dead ends: 34543 [2021-06-05 04:13:45,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-06-05 04:13:46,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-06-05 04:13:46,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996115491651206) internal successors, (103354), 34496 states have internal predecessors, (103354), 0 states have call successors, (0), 0 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 04:13:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-06-05 04:13:46,483 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-06-05 04:13:46,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:46,483 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-06-05 04:13:46,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:46,483 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-06-05 04:13:46,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:46,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:46,516 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:46,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20198,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:46,716 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:46,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:46,717 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-06-05 04:13:46,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:46,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736143504] [2021-06-05 04:13:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:46,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736143504] [2021-06-05 04:13:46,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736143504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:46,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603752246] [2021-06-05 04:13:46,785 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:46,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:46,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:46,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603752246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:46,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:46,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:46,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834851173] [2021-06-05 04:13:46,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:46,852 INFO L87 Difference]: Start difference. First operand 34497 states and 103354 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:47,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:47,007 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-06-05 04:13:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:47,008 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:47,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:47,061 INFO L225 Difference]: With dead ends: 35864 [2021-06-05 04:13:47,061 INFO L226 Difference]: Without dead ends: 35864 [2021-06-05 04:13:47,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:47,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-06-05 04:13:47,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-06-05 04:13:47,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.9955029448457946) internal successors, (103246), 34467 states have internal predecessors, (103246), 0 states have call successors, (0), 0 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 04:13:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-06-05 04:13:47,609 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-06-05 04:13:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:47,609 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-06-05 04:13:47,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-06-05 04:13:47,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:47,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:47,639 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:47,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20199 [2021-06-05 04:13:47,840 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:47,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:47,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-06-05 04:13:47,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:47,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416286801] [2021-06-05 04:13:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:47,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:47,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:47,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416286801] [2021-06-05 04:13:47,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416286801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:47,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046727610] [2021-06-05 04:13:47,909 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 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:47,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:47,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:47,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:47,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046727610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:47,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:47,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:47,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39831437] [2021-06-05 04:13:47,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:47,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:47,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:47,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:47,976 INFO L87 Difference]: Start difference. First operand 34468 states and 103246 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:48,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:48,200 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-06-05 04:13:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:13:48,200 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:48,249 INFO L225 Difference]: With dead ends: 34958 [2021-06-05 04:13:48,249 INFO L226 Difference]: Without dead ends: 34958 [2021-06-05 04:13:48,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:13:48,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-06-05 04:13:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-06-05 04:13:48,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 2.995624963782813) internal successors, (103391), 34514 states have internal predecessors, (103391), 0 states have call successors, (0), 0 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 04:13:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-06-05 04:13:48,782 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-06-05 04:13:48,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:48,782 INFO L482 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-06-05 04:13:48,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:48,782 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-06-05 04:13:48,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:48,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:48,813 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:49,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20200 [2021-06-05 04:13:49,014 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:49,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:49,014 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-06-05 04:13:49,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:49,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853439689] [2021-06-05 04:13:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:49,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853439689] [2021-06-05 04:13:49,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853439689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:49,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760099608] [2021-06-05 04:13:49,078 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 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:49,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:13:49,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:49,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:49,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:49,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760099608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:49,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:49,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:49,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045776710] [2021-06-05 04:13:49,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:49,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:49,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:49,142 INFO L87 Difference]: Start difference. First operand 34515 states and 103391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:49,380 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-06-05 04:13:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:49,431 INFO L225 Difference]: With dead ends: 35079 [2021-06-05 04:13:49,431 INFO L226 Difference]: Without dead ends: 35077 [2021-06-05 04:13:49,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-06-05 04:13:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-06-05 04:13:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34527 states, 34526 states have (on average 2.9958292301453975) internal successors, (103434), 34526 states have internal predecessors, (103434), 0 states have call successors, (0), 0 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 04:13:50,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-06-05 04:13:50,079 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-06-05 04:13:50,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:50,079 INFO L482 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-06-05 04:13:50,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:50,080 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-06-05 04:13:50,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:50,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:50,108 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:50,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20201 [2021-06-05 04:13:50,309 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-06-05 04:13:50,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:50,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415655649] [2021-06-05 04:13:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:50,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415655649] [2021-06-05 04:13:50,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415655649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:50,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835169780] [2021-06-05 04:13:50,374 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 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:50,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:50,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:50,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:50,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835169780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:50,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:50,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:50,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131207463] [2021-06-05 04:13:50,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:50,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:50,436 INFO L87 Difference]: Start difference. First operand 34527 states and 103434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:50,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:50,693 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-06-05 04:13:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:50,743 INFO L225 Difference]: With dead ends: 34780 [2021-06-05 04:13:50,743 INFO L226 Difference]: Without dead ends: 34778 [2021-06-05 04:13:50,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-06-05 04:13:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-06-05 04:13:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.9955936920222634) internal successors, (103336), 34496 states have internal predecessors, (103336), 0 states have call successors, (0), 0 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 04:13:51,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-06-05 04:13:51,257 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-06-05 04:13:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:51,257 INFO L482 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-06-05 04:13:51,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-06-05 04:13:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:51,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:51,286 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:51,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20202 [2021-06-05 04:13:51,487 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:51,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:51,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-06-05 04:13:51,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:51,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698165752] [2021-06-05 04:13:51,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:51,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:51,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698165752] [2021-06-05 04:13:51,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698165752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:51,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221831523] [2021-06-05 04:13:51,551 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 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:51,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:51,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:51,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:51,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221831523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:51,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:51,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:51,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3213690] [2021-06-05 04:13:51,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:51,619 INFO L87 Difference]: Start difference. First operand 34497 states and 103336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:51,766 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-06-05 04:13:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:13:51,766 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:51,815 INFO L225 Difference]: With dead ends: 35545 [2021-06-05 04:13:51,815 INFO L226 Difference]: Without dead ends: 35545 [2021-06-05 04:13:51,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 63.6ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-06-05 04:13:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-06-05 04:13:52,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.995536361264891) internal successors, (103349), 34501 states have internal predecessors, (103349), 0 states have call successors, (0), 0 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 04:13:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-06-05 04:13:52,342 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-06-05 04:13:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:52,342 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-06-05 04:13:52,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-06-05 04:13:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:52,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:52,373 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:52,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20203 [2021-06-05 04:13:52,574 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:52,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:52,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-06-05 04:13:52,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:52,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200179209] [2021-06-05 04:13:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:52,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:52,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200179209] [2021-06-05 04:13:52,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200179209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:52,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108338788] [2021-06-05 04:13:52,643 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 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:52,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:13:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:52,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:52,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108338788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:52,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:52,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:13:52,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506763264] [2021-06-05 04:13:52,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:52,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:52,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:52,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:52,714 INFO L87 Difference]: Start difference. First operand 34502 states and 103349 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:53,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:53,022 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-06-05 04:13:53,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:13:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:53,070 INFO L225 Difference]: With dead ends: 34731 [2021-06-05 04:13:53,070 INFO L226 Difference]: Without dead ends: 34729 [2021-06-05 04:13:53,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 134.2ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:13:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states. [2021-06-05 04:13:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34729 to 34502. [2021-06-05 04:13:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.9954783919306687) internal successors, (103347), 34501 states have internal predecessors, (103347), 0 states have call successors, (0), 0 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 04:13:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103347 transitions. [2021-06-05 04:13:53,574 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103347 transitions. Word has length 25 [2021-06-05 04:13:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:53,574 INFO L482 AbstractCegarLoop]: Abstraction has 34502 states and 103347 transitions. [2021-06-05 04:13:53,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103347 transitions. [2021-06-05 04:13:53,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:53,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:53,603 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:53,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20204 [2021-06-05 04:13:53,803 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash -262484572, now seen corresponding path program 403 times [2021-06-05 04:13:53,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:53,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708021486] [2021-06-05 04:13:53,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:53,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708021486] [2021-06-05 04:13:53,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708021486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:53,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622208555] [2021-06-05 04:13:53,876 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:53,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:53,944 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:53,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622208555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:53,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:53,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:13:53,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704204423] [2021-06-05 04:13:53,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:53,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:53,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:53,945 INFO L87 Difference]: Start difference. First operand 34502 states and 103347 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:54,120 INFO L93 Difference]: Finished difference Result 37216 states and 110229 transitions. [2021-06-05 04:13:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:13:54,121 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:54,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:54,172 INFO L225 Difference]: With dead ends: 37216 [2021-06-05 04:13:54,172 INFO L226 Difference]: Without dead ends: 37216 [2021-06-05 04:13:54,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:13:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37216 states. [2021-06-05 04:13:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37216 to 34471. [2021-06-05 04:13:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34471 states, 34470 states have (on average 2.9948651000870323) internal successors, (103233), 34470 states have internal predecessors, (103233), 0 states have call successors, (0), 0 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 04:13:54,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34471 states to 34471 states and 103233 transitions. [2021-06-05 04:13:54,718 INFO L78 Accepts]: Start accepts. Automaton has 34471 states and 103233 transitions. Word has length 25 [2021-06-05 04:13:54,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:54,718 INFO L482 AbstractCegarLoop]: Abstraction has 34471 states and 103233 transitions. [2021-06-05 04:13:54,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:54,718 INFO L276 IsEmpty]: Start isEmpty. Operand 34471 states and 103233 transitions. [2021-06-05 04:13:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:54,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:54,750 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:54,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20205,405 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:54,950 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:54,950 INFO L82 PathProgramCache]: Analyzing trace with hash -378356913, now seen corresponding path program 404 times [2021-06-05 04:13:54,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:54,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574817357] [2021-06-05 04:13:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:55,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:55,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574817357] [2021-06-05 04:13:55,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574817357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:55,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732639595] [2021-06-05 04:13:55,013 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 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:55,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:13:55,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:55,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:55,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732639595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:55,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:55,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:55,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321826166] [2021-06-05 04:13:55,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:55,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:55,080 INFO L87 Difference]: Start difference. First operand 34471 states and 103233 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:55,284 INFO L93 Difference]: Finished difference Result 35061 states and 104338 transitions. [2021-06-05 04:13:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:13:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:55,333 INFO L225 Difference]: With dead ends: 35061 [2021-06-05 04:13:55,333 INFO L226 Difference]: Without dead ends: 35061 [2021-06-05 04:13:55,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:13:55,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35061 states. [2021-06-05 04:13:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35061 to 34496. [2021-06-05 04:13:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34496 states, 34495 states have (on average 2.9951007392375706) internal successors, (103316), 34495 states have internal predecessors, (103316), 0 states have call successors, (0), 0 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 04:13:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 103316 transitions. [2021-06-05 04:13:55,919 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 103316 transitions. Word has length 25 [2021-06-05 04:13:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:55,920 INFO L482 AbstractCegarLoop]: Abstraction has 34496 states and 103316 transitions. [2021-06-05 04:13:55,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:55,920 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 103316 transitions. [2021-06-05 04:13:55,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:55,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:55,949 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:56,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20206,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:56,149 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:56,150 INFO L82 PathProgramCache]: Analyzing trace with hash 566405070, now seen corresponding path program 405 times [2021-06-05 04:13:56,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:56,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566237813] [2021-06-05 04:13:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:56,209 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:56,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566237813] [2021-06-05 04:13:56,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566237813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940942731] [2021-06-05 04:13:56,210 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 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:56,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:13:56,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:56,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:56,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:56,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940942731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:56,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:56,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354824571] [2021-06-05 04:13:56,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:56,277 INFO L87 Difference]: Start difference. First operand 34496 states and 103316 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:56,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:56,541 INFO L93 Difference]: Finished difference Result 35075 states and 104177 transitions. [2021-06-05 04:13:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:56,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:56,591 INFO L225 Difference]: With dead ends: 35075 [2021-06-05 04:13:56,591 INFO L226 Difference]: Without dead ends: 35073 [2021-06-05 04:13:56,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:56,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35073 states. [2021-06-05 04:13:57,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35073 to 34510. [2021-06-05 04:13:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34510 states, 34509 states have (on average 2.995276594511577) internal successors, (103364), 34509 states have internal predecessors, (103364), 0 states have call successors, (0), 0 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 04:13:57,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34510 states to 34510 states and 103364 transitions. [2021-06-05 04:13:57,117 INFO L78 Accepts]: Start accepts. Automaton has 34510 states and 103364 transitions. Word has length 25 [2021-06-05 04:13:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:57,117 INFO L482 AbstractCegarLoop]: Abstraction has 34510 states and 103364 transitions. [2021-06-05 04:13:57,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 34510 states and 103364 transitions. [2021-06-05 04:13:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:57,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:57,148 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:57,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20207,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:57,349 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:57,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:57,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1367097777, now seen corresponding path program 406 times [2021-06-05 04:13:57,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:57,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782453890] [2021-06-05 04:13:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:57,411 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:57,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:57,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782453890] [2021-06-05 04:13:57,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782453890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:57,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757615537] [2021-06-05 04:13:57,411 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:57,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:13:57,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:57,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757615537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:57,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:57,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:57,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045570419] [2021-06-05 04:13:57,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:57,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:57,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:57,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:57,472 INFO L87 Difference]: Start difference. First operand 34510 states and 103364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:57,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:57,730 INFO L93 Difference]: Finished difference Result 34813 states and 103831 transitions. [2021-06-05 04:13:57,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:13:57,731 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:57,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:57,780 INFO L225 Difference]: With dead ends: 34813 [2021-06-05 04:13:57,780 INFO L226 Difference]: Without dead ends: 34811 [2021-06-05 04:13:57,780 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:13:57,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34811 states. [2021-06-05 04:13:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34811 to 34480. [2021-06-05 04:13:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9950694625714203) internal successors, (103267), 34479 states have internal predecessors, (103267), 0 states have call successors, (0), 0 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 04:13:58,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103267 transitions. [2021-06-05 04:13:58,328 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103267 transitions. Word has length 25 [2021-06-05 04:13:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:58,328 INFO L482 AbstractCegarLoop]: Abstraction has 34480 states and 103267 transitions. [2021-06-05 04:13:58,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103267 transitions. [2021-06-05 04:13:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:58,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:58,359 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:58,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20208,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:58,559 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:58,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:58,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2010813166, now seen corresponding path program 407 times [2021-06-05 04:13:58,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:58,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808127070] [2021-06-05 04:13:58,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:58,619 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:58,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808127070] [2021-06-05 04:13:58,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808127070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:58,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412610242] [2021-06-05 04:13:58,619 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:58,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:13:58,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:58,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:13:58,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412610242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:58,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:58,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:13:58,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114333119] [2021-06-05 04:13:58,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:13:58,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:58,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:13:58,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:13:58,688 INFO L87 Difference]: Start difference. First operand 34480 states and 103267 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:13:58,830 INFO L93 Difference]: Finished difference Result 35049 states and 104051 transitions. [2021-06-05 04:13:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:13:58,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:13:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:13:58,878 INFO L225 Difference]: With dead ends: 35049 [2021-06-05 04:13:58,879 INFO L226 Difference]: Without dead ends: 35049 [2021-06-05 04:13:58,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:58,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35049 states. [2021-06-05 04:13:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35049 to 34468. [2021-06-05 04:13:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994574520555894) internal successors, (103214), 34467 states have internal predecessors, (103214), 0 states have call successors, (0), 0 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 04:13:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103214 transitions. [2021-06-05 04:13:59,397 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103214 transitions. Word has length 25 [2021-06-05 04:13:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:13:59,397 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103214 transitions. [2021-06-05 04:13:59,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:13:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103214 transitions. [2021-06-05 04:13:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:13:59,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:13:59,427 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:13:59,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20209,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:59,627 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:13:59,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:13:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1217256211, now seen corresponding path program 408 times [2021-06-05 04:13:59,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:13:59,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901782512] [2021-06-05 04:13:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:13:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:13:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:59,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:13:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901782512] [2021-06-05 04:13:59,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901782512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:59,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123645224] [2021-06-05 04:13:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:13:59,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:13:59,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:13:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:13:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:13:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:13:59,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123645224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:13:59,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:13:59,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:13:59,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599704617] [2021-06-05 04:13:59,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:13:59,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:13:59,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:13:59,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:13:59,758 INFO L87 Difference]: Start difference. First operand 34468 states and 103214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:00,008 INFO L93 Difference]: Finished difference Result 34766 states and 103678 transitions. [2021-06-05 04:14:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:00,057 INFO L225 Difference]: With dead ends: 34766 [2021-06-05 04:14:00,057 INFO L226 Difference]: Without dead ends: 34764 [2021-06-05 04:14:00,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:14:00,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34764 states. [2021-06-05 04:14:00,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34764 to 34468. [2021-06-05 04:14:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994516494037775) internal successors, (103212), 34467 states have internal predecessors, (103212), 0 states have call successors, (0), 0 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 04:14:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103212 transitions. [2021-06-05 04:14:00,561 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103212 transitions. Word has length 25 [2021-06-05 04:14:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:00,561 INFO L482 AbstractCegarLoop]: Abstraction has 34468 states and 103212 transitions. [2021-06-05 04:14:00,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103212 transitions. [2021-06-05 04:14:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:00,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:00,592 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:00,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20210 [2021-06-05 04:14:00,792 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:00,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:00,792 INFO L82 PathProgramCache]: Analyzing trace with hash 555106796, now seen corresponding path program 409 times [2021-06-05 04:14:00,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:00,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671931186] [2021-06-05 04:14:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:00,874 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:00,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671931186] [2021-06-05 04:14:00,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671931186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:00,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003096129] [2021-06-05 04:14:00,874 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 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:00,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:00,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003096129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:00,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:00,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917786050] [2021-06-05 04:14:00,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:00,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:00,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:00,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:00,941 INFO L87 Difference]: Start difference. First operand 34468 states and 103212 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:01,195 INFO L93 Difference]: Finished difference Result 36516 states and 108167 transitions. [2021-06-05 04:14:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:14:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:01,240 INFO L225 Difference]: With dead ends: 36516 [2021-06-05 04:14:01,240 INFO L226 Difference]: Without dead ends: 36516 [2021-06-05 04:14:01,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:14:01,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-06-05 04:14:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 34482. [2021-06-05 04:14:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34482 states, 34481 states have (on average 2.9944607174965925) internal successors, (103252), 34481 states have internal predecessors, (103252), 0 states have call successors, (0), 0 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 04:14:01,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34482 states to 34482 states and 103252 transitions. [2021-06-05 04:14:01,764 INFO L78 Accepts]: Start accepts. Automaton has 34482 states and 103252 transitions. Word has length 25 [2021-06-05 04:14:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:01,764 INFO L482 AbstractCegarLoop]: Abstraction has 34482 states and 103252 transitions. [2021-06-05 04:14:01,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:01,764 INFO L276 IsEmpty]: Start isEmpty. Operand 34482 states and 103252 transitions. [2021-06-05 04:14:01,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:01,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:01,793 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:01,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20211,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:01,994 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 272148785, now seen corresponding path program 410 times [2021-06-05 04:14:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:01,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392426980] [2021-06-05 04:14:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:02,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:02,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392426980] [2021-06-05 04:14:02,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392426980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:02,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571956549] [2021-06-05 04:14:02,066 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:02,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:02,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:02,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:02,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571956549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:02,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:02,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:02,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115294065] [2021-06-05 04:14:02,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:02,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:02,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:02,126 INFO L87 Difference]: Start difference. First operand 34482 states and 103252 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:02,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:02,354 INFO L93 Difference]: Finished difference Result 34881 states and 104144 transitions. [2021-06-05 04:14:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:02,354 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:02,402 INFO L225 Difference]: With dead ends: 34881 [2021-06-05 04:14:02,403 INFO L226 Difference]: Without dead ends: 34878 [2021-06-05 04:14:02,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:14:02,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34878 states. [2021-06-05 04:14:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34878 to 34485. [2021-06-05 04:14:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34485 states, 34484 states have (on average 2.9944032014847464) internal successors, (103259), 34484 states have internal predecessors, (103259), 0 states have call successors, (0), 0 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 04:14:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34485 states to 34485 states and 103259 transitions. [2021-06-05 04:14:02,912 INFO L78 Accepts]: Start accepts. Automaton has 34485 states and 103259 transitions. Word has length 25 [2021-06-05 04:14:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:02,912 INFO L482 AbstractCegarLoop]: Abstraction has 34485 states and 103259 transitions. [2021-06-05 04:14:02,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 34485 states and 103259 transitions. [2021-06-05 04:14:02,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:02,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:02,943 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:03,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20212 [2021-06-05 04:14:03,144 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:03,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1505753006, now seen corresponding path program 411 times [2021-06-05 04:14:03,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:03,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608204270] [2021-06-05 04:14:03,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:03,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:03,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608204270] [2021-06-05 04:14:03,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608204270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:03,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134790185] [2021-06-05 04:14:03,221 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:03,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:14:03,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:03,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:03,294 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:03,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134790185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:03,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:03,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:03,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539775868] [2021-06-05 04:14:03,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:03,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:03,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:03,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:03,295 INFO L87 Difference]: Start difference. First operand 34485 states and 103259 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:03,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:03,517 INFO L93 Difference]: Finished difference Result 46521 states and 138645 transitions. [2021-06-05 04:14:03,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:14:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:03,586 INFO L225 Difference]: With dead ends: 46521 [2021-06-05 04:14:03,586 INFO L226 Difference]: Without dead ends: 46521 [2021-06-05 04:14:03,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 93.7ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:03,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2021-06-05 04:14:04,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 44002. [2021-06-05 04:14:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.0104088543442193) internal successors, (132461), 44001 states have internal predecessors, (132461), 0 states have call successors, (0), 0 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 04:14:04,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132461 transitions. [2021-06-05 04:14:04,334 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132461 transitions. Word has length 25 [2021-06-05 04:14:04,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:04,335 INFO L482 AbstractCegarLoop]: Abstraction has 44002 states and 132461 transitions. [2021-06-05 04:14:04,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132461 transitions. [2021-06-05 04:14:04,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:04,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:04,370 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:04,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20213 [2021-06-05 04:14:04,570 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash 460670884, now seen corresponding path program 412 times [2021-06-05 04:14:04,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:04,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589866391] [2021-06-05 04:14:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:14:04,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:04,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589866391] [2021-06-05 04:14:04,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589866391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:04,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977226968] [2021-06-05 04:14:04,627 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:04,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:04,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:04,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:04,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977226968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:04,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:04,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:14:04,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201014275] [2021-06-05 04:14:04,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:14:04,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:14:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:14:04,687 INFO L87 Difference]: Start difference. First operand 44002 states and 132461 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:04,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:04,953 INFO L93 Difference]: Finished difference Result 44568 states and 133377 transitions. [2021-06-05 04:14:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:14:04,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:04,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:05,017 INFO L225 Difference]: With dead ends: 44568 [2021-06-05 04:14:05,018 INFO L226 Difference]: Without dead ends: 44564 [2021-06-05 04:14:05,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44564 states. [2021-06-05 04:14:05,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44564 to 44065. [2021-06-05 04:14:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44065 states, 44064 states have (on average 3.0110748002904866) internal successors, (132680), 44064 states have internal predecessors, (132680), 0 states have call successors, (0), 0 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 04:14:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44065 states to 44065 states and 132680 transitions. [2021-06-05 04:14:05,682 INFO L78 Accepts]: Start accepts. Automaton has 44065 states and 132680 transitions. Word has length 25 [2021-06-05 04:14:05,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:05,683 INFO L482 AbstractCegarLoop]: Abstraction has 44065 states and 132680 transitions. [2021-06-05 04:14:05,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:05,683 INFO L276 IsEmpty]: Start isEmpty. Operand 44065 states and 132680 transitions. [2021-06-05 04:14:05,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:05,717 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:05,717 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:05,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20214 [2021-06-05 04:14:05,917 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash 354023683, now seen corresponding path program 413 times [2021-06-05 04:14:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:05,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667906156] [2021-06-05 04:14:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:05,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667906156] [2021-06-05 04:14:05,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667906156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:05,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403202408] [2021-06-05 04:14:05,985 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:06,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:14:06,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:06,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:06,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:06,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403202408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:06,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:06,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:06,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571774710] [2021-06-05 04:14:06,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:06,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:06,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:06,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:06,048 INFO L87 Difference]: Start difference. First operand 44065 states and 132680 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:06,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:06,313 INFO L93 Difference]: Finished difference Result 44288 states and 133062 transitions. [2021-06-05 04:14:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:06,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:06,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:06,376 INFO L225 Difference]: With dead ends: 44288 [2021-06-05 04:14:06,377 INFO L226 Difference]: Without dead ends: 44282 [2021-06-05 04:14:06,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 123.4ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:14:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-06-05 04:14:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 44054. [2021-06-05 04:14:07,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44054 states, 44053 states have (on average 3.0111683653780674) internal successors, (132651), 44053 states have internal predecessors, (132651), 0 states have call successors, (0), 0 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 04:14:07,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44054 states to 44054 states and 132651 transitions. [2021-06-05 04:14:07,124 INFO L78 Accepts]: Start accepts. Automaton has 44054 states and 132651 transitions. Word has length 25 [2021-06-05 04:14:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:07,124 INFO L482 AbstractCegarLoop]: Abstraction has 44054 states and 132651 transitions. [2021-06-05 04:14:07,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:07,124 INFO L276 IsEmpty]: Start isEmpty. Operand 44054 states and 132651 transitions. [2021-06-05 04:14:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:07,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:07,159 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:07,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20215 [2021-06-05 04:14:07,359 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:07,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:07,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1423878108, now seen corresponding path program 414 times [2021-06-05 04:14:07,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:07,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894336480] [2021-06-05 04:14:07,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:07,426 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:07,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:07,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894336480] [2021-06-05 04:14:07,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894336480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:07,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47888669] [2021-06-05 04:14:07,426 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:07,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:14:07,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:07,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:07,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:07,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47888669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:07,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:07,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:07,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744225292] [2021-06-05 04:14:07,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:07,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:07,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:07,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:07,495 INFO L87 Difference]: Start difference. First operand 44054 states and 132651 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:07,716 INFO L93 Difference]: Finished difference Result 48810 states and 145573 transitions. [2021-06-05 04:14:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:14:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:07,788 INFO L225 Difference]: With dead ends: 48810 [2021-06-05 04:14:07,788 INFO L226 Difference]: Without dead ends: 48810 [2021-06-05 04:14:07,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2021-06-05 04:14:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 34578. [2021-06-05 04:14:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34578 states, 34577 states have (on average 2.9973971136882898) internal successors, (103641), 34577 states have internal predecessors, (103641), 0 states have call successors, (0), 0 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 04:14:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34578 states to 34578 states and 103641 transitions. [2021-06-05 04:14:08,417 INFO L78 Accepts]: Start accepts. Automaton has 34578 states and 103641 transitions. Word has length 25 [2021-06-05 04:14:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:08,417 INFO L482 AbstractCegarLoop]: Abstraction has 34578 states and 103641 transitions. [2021-06-05 04:14:08,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 34578 states and 103641 transitions. [2021-06-05 04:14:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:08,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:08,448 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:08,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20216,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:08,648 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:08,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:08,648 INFO L82 PathProgramCache]: Analyzing trace with hash -802828281, now seen corresponding path program 415 times [2021-06-05 04:14:08,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:08,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608024373] [2021-06-05 04:14:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:08,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608024373] [2021-06-05 04:14:08,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608024373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:08,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573508282] [2021-06-05 04:14:08,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:08,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573508282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:08,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:08,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:08,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239580843] [2021-06-05 04:14:08,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:08,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:08,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:08,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:08,773 INFO L87 Difference]: Start difference. First operand 34578 states and 103641 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:08,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:08,979 INFO L93 Difference]: Finished difference Result 35262 states and 104945 transitions. [2021-06-05 04:14:08,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:14:08,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:08,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:09,033 INFO L225 Difference]: With dead ends: 35262 [2021-06-05 04:14:09,033 INFO L226 Difference]: Without dead ends: 35262 [2021-06-05 04:14:09,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-06-05 04:14:09,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 34634. [2021-06-05 04:14:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34634 states, 34633 states have (on average 2.997574567608928) internal successors, (103815), 34633 states have internal predecessors, (103815), 0 states have call successors, (0), 0 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 04:14:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 103815 transitions. [2021-06-05 04:14:09,565 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 103815 transitions. Word has length 25 [2021-06-05 04:14:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:09,565 INFO L482 AbstractCegarLoop]: Abstraction has 34634 states and 103815 transitions. [2021-06-05 04:14:09,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:09,565 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 103815 transitions. [2021-06-05 04:14:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:09,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:09,596 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:09,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20217,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:09,796 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:09,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:09,796 INFO L82 PathProgramCache]: Analyzing trace with hash 141933702, now seen corresponding path program 416 times [2021-06-05 04:14:09,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:09,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913174123] [2021-06-05 04:14:09,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:09,854 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:09,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:09,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913174123] [2021-06-05 04:14:09,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913174123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:09,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333484587] [2021-06-05 04:14:09,854 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 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:09,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:09,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:09,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:09,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:09,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333484587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:09,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:09,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:09,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050397339] [2021-06-05 04:14:09,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:09,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:09,915 INFO L87 Difference]: Start difference. First operand 34634 states and 103815 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:10,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:10,160 INFO L93 Difference]: Finished difference Result 35187 states and 104616 transitions. [2021-06-05 04:14:10,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:10,160 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:10,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:10,212 INFO L225 Difference]: With dead ends: 35187 [2021-06-05 04:14:10,212 INFO L226 Difference]: Without dead ends: 35183 [2021-06-05 04:14:10,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35183 states. [2021-06-05 04:14:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35183 to 34619. [2021-06-05 04:14:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34619 states, 34618 states have (on average 2.997255762897914) internal successors, (103759), 34618 states have internal predecessors, (103759), 0 states have call successors, (0), 0 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 04:14:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34619 states to 34619 states and 103759 transitions. [2021-06-05 04:14:10,735 INFO L78 Accepts]: Start accepts. Automaton has 34619 states and 103759 transitions. Word has length 25 [2021-06-05 04:14:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:10,735 INFO L482 AbstractCegarLoop]: Abstraction has 34619 states and 103759 transitions. [2021-06-05 04:14:10,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34619 states and 103759 transitions. [2021-06-05 04:14:10,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:10,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:10,765 INFO L521 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:10,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20218,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:10,966 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:10,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:10,966 INFO L82 PathProgramCache]: Analyzing trace with hash 942626409, now seen corresponding path program 417 times [2021-06-05 04:14:10,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:10,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142928617] [2021-06-05 04:14:10,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:11,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:11,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142928617] [2021-06-05 04:14:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142928617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:11,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311939498] [2021-06-05 04:14:11,024 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 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:11,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:14:11,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:11,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 04:14:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 04:14:11,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311939498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:11,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:11,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-06-05 04:14:11,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147429922] [2021-06-05 04:14:11,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 04:14:11,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:11,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 04:14:11,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:14:11,208 INFO L87 Difference]: Start difference. First operand 34619 states and 103759 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:14:12,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:12,865 INFO L93 Difference]: Finished difference Result 67922 states and 202433 transitions. [2021-06-05 04:14:12,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-06-05 04:14:12,866 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:12,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:12,975 INFO L225 Difference]: With dead ends: 67922 [2021-06-05 04:14:12,975 INFO L226 Difference]: Without dead ends: 67903 [2021-06-05 04:14:12,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 1088.1ms TimeCoverageRelationStatistics Valid=1479, Invalid=14021, Unknown=0, NotChecked=0, Total=15500 [2021-06-05 04:14:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-06-05 04:14:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 38876. [2021-06-05 04:14:13,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38876 states, 38875 states have (on average 2.9676655948553057) internal successors, (115368), 38875 states have internal predecessors, (115368), 0 states have call successors, (0), 0 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 04:14:13,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38876 states to 38876 states and 115368 transitions. [2021-06-05 04:14:13,758 INFO L78 Accepts]: Start accepts. Automaton has 38876 states and 115368 transitions. Word has length 25 [2021-06-05 04:14:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:13,759 INFO L482 AbstractCegarLoop]: Abstraction has 38876 states and 115368 transitions. [2021-06-05 04:14:13,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 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 04:14:13,759 INFO L276 IsEmpty]: Start isEmpty. Operand 38876 states and 115368 transitions. [2021-06-05 04:14:13,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:13,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:13,791 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:13,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20219,419 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:13,992 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:13,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:13,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1859682762, now seen corresponding path program 418 times [2021-06-05 04:14:13,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:13,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149938042] [2021-06-05 04:14:13,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:14,048 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:14,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149938042] [2021-06-05 04:14:14,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149938042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:14,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032850395] [2021-06-05 04:14:14,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:14,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:14,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:14,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:14,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:14,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032850395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:14,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:14,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634303166] [2021-06-05 04:14:14,115 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:14,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:14,115 INFO L87 Difference]: Start difference. First operand 38876 states and 115368 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:14,280 INFO L93 Difference]: Finished difference Result 40813 states and 119859 transitions. [2021-06-05 04:14:14,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:14:14,280 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:14,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:14,337 INFO L225 Difference]: With dead ends: 40813 [2021-06-05 04:14:14,338 INFO L226 Difference]: Without dead ends: 40813 [2021-06-05 04:14:14,338 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:14,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40813 states. [2021-06-05 04:14:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40813 to 38877. [2021-06-05 04:14:14,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.9672291388002883) internal successors, (115354), 38876 states have internal predecessors, (115354), 0 states have call successors, (0), 0 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 04:14:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 115354 transitions. [2021-06-05 04:14:14,958 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 115354 transitions. Word has length 25 [2021-06-05 04:14:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:14,959 INFO L482 AbstractCegarLoop]: Abstraction has 38877 states and 115354 transitions. [2021-06-05 04:14:14,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 115354 transitions. [2021-06-05 04:14:14,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:14,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:14,993 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:15,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20220,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:15,193 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:15,193 INFO L82 PathProgramCache]: Analyzing trace with hash 130635428, now seen corresponding path program 419 times [2021-06-05 04:14:15,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:15,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076125975] [2021-06-05 04:14:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:15,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:15,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:15,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076125975] [2021-06-05 04:14:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076125975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:15,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989550759] [2021-06-05 04:14:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:15,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:14:15,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:15,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989550759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:15,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:15,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:14:15,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943314193] [2021-06-05 04:14:15,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:15,326 INFO L87 Difference]: Start difference. First operand 38877 states and 115354 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:15,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:15,489 INFO L93 Difference]: Finished difference Result 39523 states and 116192 transitions. [2021-06-05 04:14:15,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:14:15,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:15,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:15,543 INFO L225 Difference]: With dead ends: 39523 [2021-06-05 04:14:15,543 INFO L226 Difference]: Without dead ends: 39523 [2021-06-05 04:14:15,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39523 states. [2021-06-05 04:14:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39523 to 38819. [2021-06-05 04:14:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38819 states, 38818 states have (on average 2.9664330980472977) internal successors, (115151), 38818 states have internal predecessors, (115151), 0 states have call successors, (0), 0 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 04:14:16,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38819 states to 38819 states and 115151 transitions. [2021-06-05 04:14:16,134 INFO L78 Accepts]: Start accepts. Automaton has 38819 states and 115151 transitions. Word has length 25 [2021-06-05 04:14:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:16,135 INFO L482 AbstractCegarLoop]: Abstraction has 38819 states and 115151 transitions. [2021-06-05 04:14:16,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:16,135 INFO L276 IsEmpty]: Start isEmpty. Operand 38819 states and 115151 transitions. [2021-06-05 04:14:16,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:16,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:16,170 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:16,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20221 [2021-06-05 04:14:16,371 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1930224374, now seen corresponding path program 420 times [2021-06-05 04:14:16,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:16,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944398878] [2021-06-05 04:14:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:16,436 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:16,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:16,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944398878] [2021-06-05 04:14:16,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944398878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:16,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144978711] [2021-06-05 04:14:16,437 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 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:16,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:14:16,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:16,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:16,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:16,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144978711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:16,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:16,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:14:16,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301115407] [2021-06-05 04:14:16,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:16,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:16,511 INFO L87 Difference]: Start difference. First operand 38819 states and 115151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:16,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:16,709 INFO L93 Difference]: Finished difference Result 42306 states and 124008 transitions. [2021-06-05 04:14:16,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:14:16,709 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:16,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:16,768 INFO L225 Difference]: With dead ends: 42306 [2021-06-05 04:14:16,768 INFO L226 Difference]: Without dead ends: 42306 [2021-06-05 04:14:16,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-06-05 04:14:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 38691. [2021-06-05 04:14:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38691 states, 38690 states have (on average 2.9641509433962265) internal successors, (114683), 38690 states have internal predecessors, (114683), 0 states have call successors, (0), 0 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 04:14:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38691 states to 38691 states and 114683 transitions. [2021-06-05 04:14:17,383 INFO L78 Accepts]: Start accepts. Automaton has 38691 states and 114683 transitions. Word has length 25 [2021-06-05 04:14:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:17,384 INFO L482 AbstractCegarLoop]: Abstraction has 38691 states and 114683 transitions. [2021-06-05 04:14:17,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:17,384 INFO L276 IsEmpty]: Start isEmpty. Operand 38691 states and 114683 transitions. [2021-06-05 04:14:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:17,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:17,417 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:17,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20222,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:17,617 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:17,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:17,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1392368796, now seen corresponding path program 421 times [2021-06-05 04:14:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:17,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724004658] [2021-06-05 04:14:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:17,794 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 04:14:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:17,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:17,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724004658] [2021-06-05 04:14:17,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724004658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:17,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689990533] [2021-06-05 04:14:17,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:17,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:17,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:17,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689990533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:17,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:17,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:14:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631232667] [2021-06-05 04:14:17,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:17,920 INFO L87 Difference]: Start difference. First operand 38691 states and 114683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:18,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:18,198 INFO L93 Difference]: Finished difference Result 55502 states and 163268 transitions. [2021-06-05 04:14:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:14:18,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:18,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:18,295 INFO L225 Difference]: With dead ends: 55502 [2021-06-05 04:14:18,295 INFO L226 Difference]: Without dead ends: 55502 [2021-06-05 04:14:18,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-06-05 04:14:19,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 48558. [2021-06-05 04:14:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48558 states, 48557 states have (on average 2.977016702020306) internal successors, (144555), 48557 states have internal predecessors, (144555), 0 states have call successors, (0), 0 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 04:14:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48558 states to 48558 states and 144555 transitions. [2021-06-05 04:14:19,392 INFO L78 Accepts]: Start accepts. Automaton has 48558 states and 144555 transitions. Word has length 25 [2021-06-05 04:14:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:19,392 INFO L482 AbstractCegarLoop]: Abstraction has 48558 states and 144555 transitions. [2021-06-05 04:14:19,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 48558 states and 144555 transitions. [2021-06-05 04:14:19,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:19,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:19,431 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:19,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20223 [2021-06-05 04:14:19,631 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1145753042, now seen corresponding path program 422 times [2021-06-05 04:14:19,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:19,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074855404] [2021-06-05 04:14:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:19,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:19,700 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:19,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:19,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074855404] [2021-06-05 04:14:19,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074855404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:19,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928374744] [2021-06-05 04:14:19,701 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 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:19,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:19,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:19,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:19,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:19,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928374744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:19,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:19,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:19,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396693966] [2021-06-05 04:14:19,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:19,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:19,767 INFO L87 Difference]: Start difference. First operand 48558 states and 144555 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:20,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:20,036 INFO L93 Difference]: Finished difference Result 55938 states and 164755 transitions. [2021-06-05 04:14:20,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:14:20,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:20,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:20,126 INFO L225 Difference]: With dead ends: 55938 [2021-06-05 04:14:20,126 INFO L226 Difference]: Without dead ends: 55938 [2021-06-05 04:14:20,126 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55938 states. [2021-06-05 04:14:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55938 to 38647. [2021-06-05 04:14:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38647 states, 38646 states have (on average 2.965714433576567) internal successors, (114613), 38646 states have internal predecessors, (114613), 0 states have call successors, (0), 0 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 04:14:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38647 states to 38647 states and 114613 transitions. [2021-06-05 04:14:21,065 INFO L78 Accepts]: Start accepts. Automaton has 38647 states and 114613 transitions. Word has length 25 [2021-06-05 04:14:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:21,065 INFO L482 AbstractCegarLoop]: Abstraction has 38647 states and 114613 transitions. [2021-06-05 04:14:21,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 38647 states and 114613 transitions. [2021-06-05 04:14:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:21,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:21,099 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:21,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20224,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:21,299 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:21,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -131776818, now seen corresponding path program 423 times [2021-06-05 04:14:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:21,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826561184] [2021-06-05 04:14:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:21,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826561184] [2021-06-05 04:14:21,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826561184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:21,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344284053] [2021-06-05 04:14:21,353 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:21,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:21,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:21,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:21,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344284053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417396906] [2021-06-05 04:14:21,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:21,417 INFO L87 Difference]: Start difference. First operand 38647 states and 114613 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:21,764 INFO L93 Difference]: Finished difference Result 39269 states and 115484 transitions. [2021-06-05 04:14:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:21,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:21,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:21,832 INFO L225 Difference]: With dead ends: 39269 [2021-06-05 04:14:21,833 INFO L226 Difference]: Without dead ends: 39265 [2021-06-05 04:14:21,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39265 states. [2021-06-05 04:14:22,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39265 to 38661. [2021-06-05 04:14:22,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38661 states, 38660 states have (on average 2.9655975168132436) internal successors, (114650), 38660 states have internal predecessors, (114650), 0 states have call successors, (0), 0 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 04:14:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38661 states to 38661 states and 114650 transitions. [2021-06-05 04:14:22,486 INFO L78 Accepts]: Start accepts. Automaton has 38661 states and 114650 transitions. Word has length 25 [2021-06-05 04:14:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:22,487 INFO L482 AbstractCegarLoop]: Abstraction has 38661 states and 114650 transitions. [2021-06-05 04:14:22,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 38661 states and 114650 transitions. [2021-06-05 04:14:22,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:22,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:22,521 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:22,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20225 [2021-06-05 04:14:22,721 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:22,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1585972242, now seen corresponding path program 424 times [2021-06-05 04:14:22,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:22,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253512003] [2021-06-05 04:14:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:22,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:22,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253512003] [2021-06-05 04:14:22,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253512003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:22,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47156829] [2021-06-05 04:14:22,777 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 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:22,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:22,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:22,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:22,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:22,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47156829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:22,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:22,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:22,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798902456] [2021-06-05 04:14:22,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:22,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:22,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:22,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:22,843 INFO L87 Difference]: Start difference. First operand 38661 states and 114650 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:23,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:23,115 INFO L93 Difference]: Finished difference Result 41548 states and 121884 transitions. [2021-06-05 04:14:23,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:14:23,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:23,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:23,171 INFO L225 Difference]: With dead ends: 41548 [2021-06-05 04:14:23,171 INFO L226 Difference]: Without dead ends: 41548 [2021-06-05 04:14:23,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:23,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-06-05 04:14:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 38678. [2021-06-05 04:14:23,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38678 states, 38677 states have (on average 2.9651989554515605) internal successors, (114685), 38677 states have internal predecessors, (114685), 0 states have call successors, (0), 0 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 04:14:23,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38678 states to 38678 states and 114685 transitions. [2021-06-05 04:14:23,836 INFO L78 Accepts]: Start accepts. Automaton has 38678 states and 114685 transitions. Word has length 25 [2021-06-05 04:14:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:23,836 INFO L482 AbstractCegarLoop]: Abstraction has 38678 states and 114685 transitions. [2021-06-05 04:14:23,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 38678 states and 114685 transitions. [2021-06-05 04:14:23,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:23,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:23,873 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:24,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20226,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:24,074 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:24,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:24,074 INFO L82 PathProgramCache]: Analyzing trace with hash -143075092, now seen corresponding path program 425 times [2021-06-05 04:14:24,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:24,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945961527] [2021-06-05 04:14:24,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:24,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:24,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945961527] [2021-06-05 04:14:24,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945961527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:24,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477422096] [2021-06-05 04:14:24,135 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 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:24,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:14:24,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:24,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:24,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477422096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:24,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:24,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:24,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798292018] [2021-06-05 04:14:24,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:24,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:24,204 INFO L87 Difference]: Start difference. First operand 38678 states and 114685 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:24,499 INFO L93 Difference]: Finished difference Result 41975 states and 123155 transitions. [2021-06-05 04:14:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:14:24,499 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:24,555 INFO L225 Difference]: With dead ends: 41975 [2021-06-05 04:14:24,555 INFO L226 Difference]: Without dead ends: 41975 [2021-06-05 04:14:24,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 74.9ms TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:14:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41975 states. [2021-06-05 04:14:25,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41975 to 38672. [2021-06-05 04:14:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38672 states, 38671 states have (on average 2.9648832458431382) internal successors, (114655), 38671 states have internal predecessors, (114655), 0 states have call successors, (0), 0 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 04:14:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38672 states to 38672 states and 114655 transitions. [2021-06-05 04:14:25,388 INFO L78 Accepts]: Start accepts. Automaton has 38672 states and 114655 transitions. Word has length 25 [2021-06-05 04:14:25,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:25,388 INFO L482 AbstractCegarLoop]: Abstraction has 38672 states and 114655 transitions. [2021-06-05 04:14:25,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:25,388 INFO L276 IsEmpty]: Start isEmpty. Operand 38672 states and 114655 transitions. [2021-06-05 04:14:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:25,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:25,423 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:25,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20227,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:25,624 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:25,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:25,624 INFO L82 PathProgramCache]: Analyzing trace with hash 2091032402, now seen corresponding path program 426 times [2021-06-05 04:14:25,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:25,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448824691] [2021-06-05 04:14:25,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:25,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448824691] [2021-06-05 04:14:25,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448824691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:25,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293068986] [2021-06-05 04:14:25,687 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 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:25,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:14:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:25,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:25,756 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:25,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293068986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:25,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:25,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:25,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234969409] [2021-06-05 04:14:25,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:25,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:25,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:25,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:25,756 INFO L87 Difference]: Start difference. First operand 38672 states and 114655 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:25,987 INFO L93 Difference]: Finished difference Result 60964 states and 181254 transitions. [2021-06-05 04:14:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:14:25,988 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:26,090 INFO L225 Difference]: With dead ends: 60964 [2021-06-05 04:14:26,090 INFO L226 Difference]: Without dead ends: 60964 [2021-06-05 04:14:26,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:14:26,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60964 states. [2021-06-05 04:14:27,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60964 to 60066. [2021-06-05 04:14:27,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60066 states, 60065 states have (on average 2.996270706734371) internal successors, (179971), 60065 states have internal predecessors, (179971), 0 states have call successors, (0), 0 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 04:14:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60066 states to 60066 states and 179971 transitions. [2021-06-05 04:14:27,283 INFO L78 Accepts]: Start accepts. Automaton has 60066 states and 179971 transitions. Word has length 25 [2021-06-05 04:14:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:27,284 INFO L482 AbstractCegarLoop]: Abstraction has 60066 states and 179971 transitions. [2021-06-05 04:14:27,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 60066 states and 179971 transitions. [2021-06-05 04:14:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:27,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:27,331 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:27,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20228,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:27,532 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1666079316, now seen corresponding path program 427 times [2021-06-05 04:14:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:27,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815138824] [2021-06-05 04:14:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:27,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:27,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815138824] [2021-06-05 04:14:27,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815138824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:27,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843529244] [2021-06-05 04:14:27,608 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 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:27,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:27,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:27,680 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:27,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843529244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:27,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:27,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:27,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905855786] [2021-06-05 04:14:27,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:27,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:27,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:27,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:27,681 INFO L87 Difference]: Start difference. First operand 60066 states and 179971 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:28,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:28,204 INFO L93 Difference]: Finished difference Result 63184 states and 187571 transitions. [2021-06-05 04:14:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:14:28,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:28,329 INFO L225 Difference]: With dead ends: 63184 [2021-06-05 04:14:28,329 INFO L226 Difference]: Without dead ends: 63184 [2021-06-05 04:14:28,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 111.5ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63184 states. [2021-06-05 04:14:29,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63184 to 59924. [2021-06-05 04:14:29,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59924 states, 59923 states have (on average 2.995427465247067) internal successors, (179495), 59923 states have internal predecessors, (179495), 0 states have call successors, (0), 0 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 04:14:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59924 states to 59924 states and 179495 transitions. [2021-06-05 04:14:29,502 INFO L78 Accepts]: Start accepts. Automaton has 59924 states and 179495 transitions. Word has length 25 [2021-06-05 04:14:29,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:29,502 INFO L482 AbstractCegarLoop]: Abstraction has 59924 states and 179495 transitions. [2021-06-05 04:14:29,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:29,502 INFO L276 IsEmpty]: Start isEmpty. Operand 59924 states and 179495 transitions. [2021-06-05 04:14:29,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:29,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:29,547 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:29,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20229,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:29,748 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:29,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:29,748 INFO L82 PathProgramCache]: Analyzing trace with hash 2122541714, now seen corresponding path program 428 times [2021-06-05 04:14:29,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:29,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294544643] [2021-06-05 04:14:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:29,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:29,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294544643] [2021-06-05 04:14:29,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294544643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:29,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697124197] [2021-06-05 04:14:29,822 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 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:29,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:29,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:29,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697124197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:29,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:29,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472936903] [2021-06-05 04:14:29,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:29,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:29,889 INFO L87 Difference]: Start difference. First operand 59924 states and 179495 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:30,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:30,301 INFO L93 Difference]: Finished difference Result 90970 states and 272969 transitions. [2021-06-05 04:14:30,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:14:30,302 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:30,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:30,680 INFO L225 Difference]: With dead ends: 90970 [2021-06-05 04:14:30,680 INFO L226 Difference]: Without dead ends: 90970 [2021-06-05 04:14:30,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 147.3ms TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:30,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90970 states. [2021-06-05 04:14:32,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90970 to 87092. [2021-06-05 04:14:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87092 states, 87091 states have (on average 3.022287033103306) internal successors, (263214), 87091 states have internal predecessors, (263214), 0 states have call successors, (0), 0 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 04:14:32,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 263214 transitions. [2021-06-05 04:14:32,362 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 263214 transitions. Word has length 25 [2021-06-05 04:14:32,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:32,362 INFO L482 AbstractCegarLoop]: Abstraction has 87092 states and 263214 transitions. [2021-06-05 04:14:32,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:32,363 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 263214 transitions. [2021-06-05 04:14:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:32,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:32,434 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:32,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20230 [2021-06-05 04:14:32,635 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:32,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:32,635 INFO L82 PathProgramCache]: Analyzing trace with hash -195102390, now seen corresponding path program 429 times [2021-06-05 04:14:32,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:32,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75112401] [2021-06-05 04:14:32,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:32,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:32,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75112401] [2021-06-05 04:14:32,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75112401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:32,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797125496] [2021-06-05 04:14:32,697 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 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:32,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:32,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:32,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797125496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:32,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:32,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:14:32,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552376405] [2021-06-05 04:14:32,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:32,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:32,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:32,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:32,770 INFO L87 Difference]: Start difference. First operand 87092 states and 263214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:33,407 INFO L93 Difference]: Finished difference Result 87908 states and 264688 transitions. [2021-06-05 04:14:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:14:33,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:33,572 INFO L225 Difference]: With dead ends: 87908 [2021-06-05 04:14:33,572 INFO L226 Difference]: Without dead ends: 87908 [2021-06-05 04:14:33,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:14:33,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87908 states. [2021-06-05 04:14:35,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87908 to 87088. [2021-06-05 04:14:35,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87088 states, 87087 states have (on average 3.0224832638625743) internal successors, (263219), 87087 states have internal predecessors, (263219), 0 states have call successors, (0), 0 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 04:14:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87088 states to 87088 states and 263219 transitions. [2021-06-05 04:14:35,360 INFO L78 Accepts]: Start accepts. Automaton has 87088 states and 263219 transitions. Word has length 25 [2021-06-05 04:14:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:35,361 INFO L482 AbstractCegarLoop]: Abstraction has 87088 states and 263219 transitions. [2021-06-05 04:14:35,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 87088 states and 263219 transitions. [2021-06-05 04:14:35,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:35,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:35,433 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:35,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20231 [2021-06-05 04:14:35,633 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:35,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:35,634 INFO L82 PathProgramCache]: Analyzing trace with hash 342753188, now seen corresponding path program 430 times [2021-06-05 04:14:35,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:35,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150980120] [2021-06-05 04:14:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:35,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:35,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150980120] [2021-06-05 04:14:35,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150980120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:35,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058938734] [2021-06-05 04:14:35,703 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 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:35,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:35,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:35,768 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:35,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058938734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:35,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:35,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:35,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424167106] [2021-06-05 04:14:35,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:35,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:35,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:35,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:35,769 INFO L87 Difference]: Start difference. First operand 87088 states and 263219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:36,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:36,162 INFO L93 Difference]: Finished difference Result 94912 states and 285142 transitions. [2021-06-05 04:14:36,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:14:36,162 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:36,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:36,690 INFO L225 Difference]: With dead ends: 94912 [2021-06-05 04:14:36,691 INFO L226 Difference]: Without dead ends: 94912 [2021-06-05 04:14:36,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:14:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94912 states. [2021-06-05 04:14:37,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94912 to 56562. [2021-06-05 04:14:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56562 states, 56561 states have (on average 2.9879068616184297) internal successors, (168999), 56561 states have internal predecessors, (168999), 0 states have call successors, (0), 0 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 04:14:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 168999 transitions. [2021-06-05 04:14:38,019 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 168999 transitions. Word has length 25 [2021-06-05 04:14:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:38,019 INFO L482 AbstractCegarLoop]: Abstraction has 56562 states and 168999 transitions. [2021-06-05 04:14:38,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 168999 transitions. [2021-06-05 04:14:38,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:38,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:38,063 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:38,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20232 [2021-06-05 04:14:38,264 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:38,264 INFO L82 PathProgramCache]: Analyzing trace with hash -163593078, now seen corresponding path program 431 times [2021-06-05 04:14:38,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:38,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598000333] [2021-06-05 04:14:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:38,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598000333] [2021-06-05 04:14:38,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598000333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:38,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892557451] [2021-06-05 04:14:38,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:38,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-05 04:14:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:38,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:38,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892557451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:38,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:38,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:38,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940410862] [2021-06-05 04:14:38,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:38,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:38,406 INFO L87 Difference]: Start difference. First operand 56562 states and 168999 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:38,611 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2021-06-05 04:14:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:38,963 INFO L93 Difference]: Finished difference Result 78230 states and 232047 transitions. [2021-06-05 04:14:38,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:14:38,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:38,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:39,114 INFO L225 Difference]: With dead ends: 78230 [2021-06-05 04:14:39,114 INFO L226 Difference]: Without dead ends: 78230 [2021-06-05 04:14:39,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:39,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2021-06-05 04:14:40,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 47991. [2021-06-05 04:14:40,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.974286309647843) internal successors, (142736), 47990 states have internal predecessors, (142736), 0 states have call successors, (0), 0 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 04:14:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142736 transitions. [2021-06-05 04:14:40,384 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142736 transitions. Word has length 25 [2021-06-05 04:14:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:40,384 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142736 transitions. [2021-06-05 04:14:40,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142736 transitions. [2021-06-05 04:14:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:40,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:40,422 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:40,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20233 [2021-06-05 04:14:40,622 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:40,623 INFO L82 PathProgramCache]: Analyzing trace with hash 76191076, now seen corresponding path program 432 times [2021-06-05 04:14:40,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:40,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201260727] [2021-06-05 04:14:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:14:40,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:40,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201260727] [2021-06-05 04:14:40,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201260727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:40,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546098755] [2021-06-05 04:14:40,673 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 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:40,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:14:40,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:40,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:14:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546098755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:40,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:40,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:14:40,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650362899] [2021-06-05 04:14:40,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:14:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:14:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:14:40,737 INFO L87 Difference]: Start difference. First operand 47991 states and 142736 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:41,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:41,158 INFO L93 Difference]: Finished difference Result 48514 states and 143403 transitions. [2021-06-05 04:14:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:14:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:41,225 INFO L225 Difference]: With dead ends: 48514 [2021-06-05 04:14:41,225 INFO L226 Difference]: Without dead ends: 48510 [2021-06-05 04:14:41,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:14:41,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48510 states. [2021-06-05 04:14:41,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48510 to 47991. [2021-06-05 04:14:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.9742029589497814) internal successors, (142732), 47990 states have internal predecessors, (142732), 0 states have call successors, (0), 0 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 04:14:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142732 transitions. [2021-06-05 04:14:42,060 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142732 transitions. Word has length 25 [2021-06-05 04:14:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:42,060 INFO L482 AbstractCegarLoop]: Abstraction has 47991 states and 142732 transitions. [2021-06-05 04:14:42,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142732 transitions. [2021-06-05 04:14:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:42,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:42,098 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:42,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20234,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:42,298 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash -800059932, now seen corresponding path program 433 times [2021-06-05 04:14:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:42,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146779302] [2021-06-05 04:14:42,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:42,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:42,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146779302] [2021-06-05 04:14:42,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146779302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:42,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832414881] [2021-06-05 04:14:42,370 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 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:42,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:42,440 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:42,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832414881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:42,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:42,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:42,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772697038] [2021-06-05 04:14:42,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:42,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:42,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:42,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:42,441 INFO L87 Difference]: Start difference. First operand 47991 states and 142732 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:42,734 INFO L93 Difference]: Finished difference Result 56834 states and 167301 transitions. [2021-06-05 04:14:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:14:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:42,828 INFO L225 Difference]: With dead ends: 56834 [2021-06-05 04:14:42,828 INFO L226 Difference]: Without dead ends: 56834 [2021-06-05 04:14:42,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:14:42,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56834 states. [2021-06-05 04:14:43,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56834 to 38382. [2021-06-05 04:14:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38382 states, 38381 states have (on average 2.965660092233136) internal successors, (113825), 38381 states have internal predecessors, (113825), 0 states have call successors, (0), 0 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 04:14:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38382 states to 38382 states and 113825 transitions. [2021-06-05 04:14:43,825 INFO L78 Accepts]: Start accepts. Automaton has 38382 states and 113825 transitions. Word has length 25 [2021-06-05 04:14:43,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:43,825 INFO L482 AbstractCegarLoop]: Abstraction has 38382 states and 113825 transitions. [2021-06-05 04:14:43,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 38382 states and 113825 transitions. [2021-06-05 04:14:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:43,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:43,860 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:44,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20235 [2021-06-05 04:14:44,060 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:44,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash -26868346, now seen corresponding path program 434 times [2021-06-05 04:14:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:44,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055101493] [2021-06-05 04:14:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:44,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:44,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055101493] [2021-06-05 04:14:44,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055101493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:44,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422043723] [2021-06-05 04:14:44,120 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 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:44,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:44,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:44,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:44,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:44,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422043723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:44,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:44,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:44,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120285541] [2021-06-05 04:14:44,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:44,186 INFO L87 Difference]: Start difference. First operand 38382 states and 113825 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:44,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:44,616 INFO L93 Difference]: Finished difference Result 38968 states and 114634 transitions. [2021-06-05 04:14:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:14:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:44,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:44,666 INFO L225 Difference]: With dead ends: 38968 [2021-06-05 04:14:44,666 INFO L226 Difference]: Without dead ends: 38964 [2021-06-05 04:14:44,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:14:44,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-06-05 04:14:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 38396. [2021-06-05 04:14:45,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38396 states, 38395 states have (on average 2.9655684333897643) internal successors, (113863), 38395 states have internal predecessors, (113863), 0 states have call successors, (0), 0 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 04:14:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38396 states to 38396 states and 113863 transitions. [2021-06-05 04:14:45,244 INFO L78 Accepts]: Start accepts. Automaton has 38396 states and 113863 transitions. Word has length 25 [2021-06-05 04:14:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:45,244 INFO L482 AbstractCegarLoop]: Abstraction has 38396 states and 113863 transitions. [2021-06-05 04:14:45,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 38396 states and 113863 transitions. [2021-06-05 04:14:45,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:45,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:45,278 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:45,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20236,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:45,479 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:45,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:45,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1690880714, now seen corresponding path program 435 times [2021-06-05 04:14:45,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:45,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471025971] [2021-06-05 04:14:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:45,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471025971] [2021-06-05 04:14:45,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471025971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:45,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246567857] [2021-06-05 04:14:45,533 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 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:45,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:45,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:45,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:45,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246567857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:45,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:45,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:14:45,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993363001] [2021-06-05 04:14:45,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:14:45,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:45,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:14:45,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:14:45,724 INFO L87 Difference]: Start difference. First operand 38396 states and 113863 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:45,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:45,904 INFO L93 Difference]: Finished difference Result 41573 states and 121933 transitions. [2021-06-05 04:14:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:14:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:45,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:45,962 INFO L225 Difference]: With dead ends: 41573 [2021-06-05 04:14:45,963 INFO L226 Difference]: Without dead ends: 41573 [2021-06-05 04:14:45,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:14:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-06-05 04:14:46,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 38413. [2021-06-05 04:14:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 2.9653493699885454) internal successors, (113905), 38412 states have internal predecessors, (113905), 0 states have call successors, (0), 0 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 04:14:46,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 113905 transitions. [2021-06-05 04:14:46,718 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 113905 transitions. Word has length 25 [2021-06-05 04:14:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:46,718 INFO L482 AbstractCegarLoop]: Abstraction has 38413 states and 113905 transitions. [2021-06-05 04:14:46,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:46,718 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 113905 transitions. [2021-06-05 04:14:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:46,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:46,753 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:46,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20237 [2021-06-05 04:14:46,954 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:46,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:46,954 INFO L82 PathProgramCache]: Analyzing trace with hash -38166620, now seen corresponding path program 436 times [2021-06-05 04:14:46,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:46,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071321256] [2021-06-05 04:14:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:47,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071321256] [2021-06-05 04:14:47,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071321256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:47,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131782684] [2021-06-05 04:14:47,010 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 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:47,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:47,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:47,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:47,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:47,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131782684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:47,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:47,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:14:47,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023762208] [2021-06-05 04:14:47,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:14:47,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:14:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:14:47,082 INFO L87 Difference]: Start difference. First operand 38413 states and 113905 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:47,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:47,295 INFO L93 Difference]: Finished difference Result 43427 states and 127338 transitions. [2021-06-05 04:14:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:14:47,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:47,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:47,362 INFO L225 Difference]: With dead ends: 43427 [2021-06-05 04:14:47,362 INFO L226 Difference]: Without dead ends: 43427 [2021-06-05 04:14:47,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:14:47,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43427 states. [2021-06-05 04:14:48,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43427 to 38418. [2021-06-05 04:14:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38418 states, 38417 states have (on average 2.965197698935367) internal successors, (113914), 38417 states have internal predecessors, (113914), 0 states have call successors, (0), 0 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 04:14:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 113914 transitions. [2021-06-05 04:14:48,132 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 113914 transitions. Word has length 25 [2021-06-05 04:14:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:48,133 INFO L482 AbstractCegarLoop]: Abstraction has 38418 states and 113914 transitions. [2021-06-05 04:14:48,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:14:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 113914 transitions. [2021-06-05 04:14:48,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:48,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:48,168 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:48,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20238,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:48,368 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:48,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2099026422, now seen corresponding path program 437 times [2021-06-05 04:14:48,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:48,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313789207] [2021-06-05 04:14:48,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:48,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:48,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313789207] [2021-06-05 04:14:48,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313789207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:48,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460002552] [2021-06-05 04:14:48,438 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 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:48,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:14:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:48,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:48,518 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:48,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460002552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:48,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:48,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:14:48,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29196371] [2021-06-05 04:14:48,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:48,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:48,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:48,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:48,519 INFO L87 Difference]: Start difference. First operand 38418 states and 113914 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:48,751 INFO L93 Difference]: Finished difference Result 42897 states and 125903 transitions. [2021-06-05 04:14:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:14:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:48,819 INFO L225 Difference]: With dead ends: 42897 [2021-06-05 04:14:48,820 INFO L226 Difference]: Without dead ends: 42897 [2021-06-05 04:14:48,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:14:48,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2021-06-05 04:14:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 38354. [2021-06-05 04:14:49,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 2.964644226005788) internal successors, (113703), 38353 states have internal predecessors, (113703), 0 states have call successors, (0), 0 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 04:14:49,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 113703 transitions. [2021-06-05 04:14:49,604 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 113703 transitions. Word has length 25 [2021-06-05 04:14:49,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:49,604 INFO L482 AbstractCegarLoop]: Abstraction has 38354 states and 113703 transitions. [2021-06-05 04:14:49,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:49,604 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 113703 transitions. [2021-06-05 04:14:49,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:49,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:49,638 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:49,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20239,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:49,838 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:49,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170844, now seen corresponding path program 438 times [2021-06-05 04:14:49,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:49,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379087352] [2021-06-05 04:14:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:49,903 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:49,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:49,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379087352] [2021-06-05 04:14:49,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379087352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:49,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679018824] [2021-06-05 04:14:49,904 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 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:49,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:14:49,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:49,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:49,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:49,976 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:49,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679018824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:49,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:49,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:14:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833286173] [2021-06-05 04:14:49,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:49,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:49,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:49,977 INFO L87 Difference]: Start difference. First operand 38354 states and 113703 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:50,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:50,229 INFO L93 Difference]: Finished difference Result 63716 states and 189177 transitions. [2021-06-05 04:14:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:14:50,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:50,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:50,340 INFO L225 Difference]: With dead ends: 63716 [2021-06-05 04:14:50,341 INFO L226 Difference]: Without dead ends: 63716 [2021-06-05 04:14:50,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:14:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63716 states. [2021-06-05 04:14:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63716 to 58655. [2021-06-05 04:14:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58655 states, 58654 states have (on average 2.9932314931632966) internal successors, (175565), 58654 states have internal predecessors, (175565), 0 states have call successors, (0), 0 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 04:14:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58655 states to 58655 states and 175565 transitions. [2021-06-05 04:14:51,672 INFO L78 Accepts]: Start accepts. Automaton has 58655 states and 175565 transitions. Word has length 25 [2021-06-05 04:14:51,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:51,672 INFO L482 AbstractCegarLoop]: Abstraction has 58655 states and 175565 transitions. [2021-06-05 04:14:51,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 58655 states and 175565 transitions. [2021-06-05 04:14:51,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:51,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:51,718 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:51,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20240,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:51,918 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:51,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2067517110, now seen corresponding path program 439 times [2021-06-05 04:14:51,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:51,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931404777] [2021-06-05 04:14:51,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:51,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931404777] [2021-06-05 04:14:51,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931404777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:51,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814310711] [2021-06-05 04:14:51,991 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 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:52,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:52,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:52,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814310711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:52,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:52,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623853318] [2021-06-05 04:14:52,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:52,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:52,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:52,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:52,062 INFO L87 Difference]: Start difference. First operand 58655 states and 175565 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:52,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:52,384 INFO L93 Difference]: Finished difference Result 65878 states and 195353 transitions. [2021-06-05 04:14:52,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:14:52,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:52,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:52,501 INFO L225 Difference]: With dead ends: 65878 [2021-06-05 04:14:52,501 INFO L226 Difference]: Without dead ends: 65878 [2021-06-05 04:14:52,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:14:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65878 states. [2021-06-05 04:14:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65878 to 58492. [2021-06-05 04:14:53,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58492 states, 58491 states have (on average 2.992528765109162) internal successors, (175036), 58491 states have internal predecessors, (175036), 0 states have call successors, (0), 0 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 04:14:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 175036 transitions. [2021-06-05 04:14:53,775 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 175036 transitions. Word has length 25 [2021-06-05 04:14:53,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:53,775 INFO L482 AbstractCegarLoop]: Abstraction has 58492 states and 175036 transitions. [2021-06-05 04:14:53,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 175036 transitions. [2021-06-05 04:14:53,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:53,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:53,820 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:54,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20241 [2021-06-05 04:14:54,021 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -584382172, now seen corresponding path program 440 times [2021-06-05 04:14:54,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:54,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137651735] [2021-06-05 04:14:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:54,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137651735] [2021-06-05 04:14:54,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137651735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:54,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987029386] [2021-06-05 04:14:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:54,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:14:54,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:54,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:54,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987029386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:54,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:54,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:14:54,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720727200] [2021-06-05 04:14:54,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:54,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:54,353 INFO L87 Difference]: Start difference. First operand 58492 states and 175036 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:54,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:54,815 INFO L93 Difference]: Finished difference Result 92257 states and 276233 transitions. [2021-06-05 04:14:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 04:14:54,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:54,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:54,985 INFO L225 Difference]: With dead ends: 92257 [2021-06-05 04:14:54,985 INFO L226 Difference]: Without dead ends: 92257 [2021-06-05 04:14:54,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:14:55,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92257 states. [2021-06-05 04:14:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92257 to 82743. [2021-06-05 04:14:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82743 states, 82742 states have (on average 3.0198569045950063) internal successors, (249869), 82742 states have internal predecessors, (249869), 0 states have call successors, (0), 0 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 04:14:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82743 states to 82743 states and 249869 transitions. [2021-06-05 04:14:56,727 INFO L78 Accepts]: Start accepts. Automaton has 82743 states and 249869 transitions. Word has length 25 [2021-06-05 04:14:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:56,727 INFO L482 AbstractCegarLoop]: Abstraction has 82743 states and 249869 transitions. [2021-06-05 04:14:56,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 82743 states and 249869 transitions. [2021-06-05 04:14:56,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:56,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:56,794 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:56,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20242,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:56,995 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:56,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:56,995 INFO L82 PathProgramCache]: Analyzing trace with hash 583094636, now seen corresponding path program 441 times [2021-06-05 04:14:56,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:56,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211543310] [2021-06-05 04:14:56,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:57,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:57,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211543310] [2021-06-05 04:14:57,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211543310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:57,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15393564] [2021-06-05 04:14:57,060 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 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:57,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:14:57,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:57,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:57,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:14:57,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15393564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:57,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:57,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:14:57,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461140800] [2021-06-05 04:14:57,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:14:57,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:57,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:14:57,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:14:57,128 INFO L87 Difference]: Start difference. First operand 82743 states and 249869 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:14:57,456 INFO L93 Difference]: Finished difference Result 83322 states and 250595 transitions. [2021-06-05 04:14:57,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:14:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:14:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:14:57,600 INFO L225 Difference]: With dead ends: 83322 [2021-06-05 04:14:57,600 INFO L226 Difference]: Without dead ends: 83321 [2021-06-05 04:14:57,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:14:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2021-06-05 04:14:59,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 82266. [2021-06-05 04:14:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82266 states, 82265 states have (on average 3.0184768735185075) internal successors, (248315), 82265 states have internal predecessors, (248315), 0 states have call successors, (0), 0 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 04:14:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82266 states to 82266 states and 248315 transitions. [2021-06-05 04:14:59,419 INFO L78 Accepts]: Start accepts. Automaton has 82266 states and 248315 transitions. Word has length 25 [2021-06-05 04:14:59,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:14:59,419 INFO L482 AbstractCegarLoop]: Abstraction has 82266 states and 248315 transitions. [2021-06-05 04:14:59,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:14:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 82266 states and 248315 transitions. [2021-06-05 04:14:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:14:59,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:14:59,484 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:14:59,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20243 [2021-06-05 04:14:59,684 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:14:59,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:14:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash 76748370, now seen corresponding path program 442 times [2021-06-05 04:14:59,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:14:59,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725834336] [2021-06-05 04:14:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:14:59,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:14:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:59,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:14:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725834336] [2021-06-05 04:14:59,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725834336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:59,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269908809] [2021-06-05 04:14:59,757 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 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:14:59,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:14:59,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:14:59,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:14:59,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:14:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:14:59,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269908809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:14:59,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:14:59,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:14:59,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227671192] [2021-06-05 04:14:59,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:14:59,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:14:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:14:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:14:59,822 INFO L87 Difference]: Start difference. First operand 82266 states and 248315 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:00,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:00,214 INFO L93 Difference]: Finished difference Result 90893 states and 272842 transitions. [2021-06-05 04:15:00,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:15:00,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:00,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:00,374 INFO L225 Difference]: With dead ends: 90893 [2021-06-05 04:15:00,374 INFO L226 Difference]: Without dead ends: 90893 [2021-06-05 04:15:00,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-06-05 04:15:00,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90893 states. [2021-06-05 04:15:01,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90893 to 54760. [2021-06-05 04:15:01,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54760 states, 54759 states have (on average 2.982103398528096) internal successors, (163297), 54759 states have internal predecessors, (163297), 0 states have call successors, (0), 0 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 04:15:01,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 163297 transitions. [2021-06-05 04:15:01,888 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 163297 transitions. Word has length 25 [2021-06-05 04:15:01,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:01,888 INFO L482 AbstractCegarLoop]: Abstraction has 54760 states and 163297 transitions. [2021-06-05 04:15:01,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 163297 transitions. [2021-06-05 04:15:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:01,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:01,927 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:02,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20244,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:02,127 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1559883308, now seen corresponding path program 443 times [2021-06-05 04:15:02,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:02,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348500157] [2021-06-05 04:15:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:02,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:02,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348500157] [2021-06-05 04:15:02,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348500157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:02,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567862243] [2021-06-05 04:15:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:02,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:15:02,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:02,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:02,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:02,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567862243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:02,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:02,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:02,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950694770] [2021-06-05 04:15:02,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:02,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:02,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:02,284 INFO L87 Difference]: Start difference. First operand 54760 states and 163297 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:02,712 INFO L93 Difference]: Finished difference Result 77734 states and 230348 transitions. [2021-06-05 04:15:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:15:02,712 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:02,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:02,865 INFO L225 Difference]: With dead ends: 77734 [2021-06-05 04:15:02,865 INFO L226 Difference]: Without dead ends: 77734 [2021-06-05 04:15:02,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 04:15:02,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77734 states. [2021-06-05 04:15:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77734 to 43949. [2021-06-05 04:15:04,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43949 states, 43948 states have (on average 2.969532174387913) internal successors, (130505), 43948 states have internal predecessors, (130505), 0 states have call successors, (0), 0 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 04:15:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43949 states to 43949 states and 130505 transitions. [2021-06-05 04:15:04,128 INFO L78 Accepts]: Start accepts. Automaton has 43949 states and 130505 transitions. Word has length 25 [2021-06-05 04:15:04,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:04,128 INFO L482 AbstractCegarLoop]: Abstraction has 43949 states and 130505 transitions. [2021-06-05 04:15:04,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 43949 states and 130505 transitions. [2021-06-05 04:15:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:04,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:04,164 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:04,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20245 [2021-06-05 04:15:04,365 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:04,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:04,365 INFO L82 PathProgramCache]: Analyzing trace with hash -990719982, now seen corresponding path program 444 times [2021-06-05 04:15:04,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:04,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592339225] [2021-06-05 04:15:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:04,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:04,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592339225] [2021-06-05 04:15:04,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592339225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:04,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232601467] [2021-06-05 04:15:04,447 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 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:04,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:15:04,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:04,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:04,515 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:04,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232601467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:04,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:04,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:04,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165621134] [2021-06-05 04:15:04,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:04,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:04,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:04,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:04,516 INFO L87 Difference]: Start difference. First operand 43949 states and 130505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:05,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:05,039 INFO L93 Difference]: Finished difference Result 74263 states and 220319 transitions. [2021-06-05 04:15:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:05,040 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:05,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:05,171 INFO L225 Difference]: With dead ends: 74263 [2021-06-05 04:15:05,171 INFO L226 Difference]: Without dead ends: 74263 [2021-06-05 04:15:05,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:15:05,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74263 states. [2021-06-05 04:15:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74263 to 67922. [2021-06-05 04:15:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67922 states, 67921 states have (on average 2.9886780229973056) internal successors, (202994), 67921 states have internal predecessors, (202994), 0 states have call successors, (0), 0 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 04:15:06,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67922 states to 67922 states and 202994 transitions. [2021-06-05 04:15:06,552 INFO L78 Accepts]: Start accepts. Automaton has 67922 states and 202994 transitions. Word has length 25 [2021-06-05 04:15:06,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:06,552 INFO L482 AbstractCegarLoop]: Abstraction has 67922 states and 202994 transitions. [2021-06-05 04:15:06,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:06,552 INFO L276 IsEmpty]: Start isEmpty. Operand 67922 states and 202994 transitions. [2021-06-05 04:15:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:06,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:06,601 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:06,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20246 [2021-06-05 04:15:06,802 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:06,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1069673010, now seen corresponding path program 445 times [2021-06-05 04:15:06,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:06,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087069085] [2021-06-05 04:15:06,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:06,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087069085] [2021-06-05 04:15:06,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087069085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:06,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926538660] [2021-06-05 04:15:06,855 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 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:06,915 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:06,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926538660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:06,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:06,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:15:06,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062179274] [2021-06-05 04:15:06,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:15:06,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:06,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:15:06,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:06,916 INFO L87 Difference]: Start difference. First operand 67922 states and 202994 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:07,502 INFO L93 Difference]: Finished difference Result 68435 states and 203689 transitions. [2021-06-05 04:15:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:15:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:07,622 INFO L225 Difference]: With dead ends: 68435 [2021-06-05 04:15:07,622 INFO L226 Difference]: Without dead ends: 68431 [2021-06-05 04:15:07,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:15:07,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68431 states. [2021-06-05 04:15:08,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68431 to 67936. [2021-06-05 04:15:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67936 states, 67935 states have (on average 2.988253477588872) internal successors, (203007), 67935 states have internal predecessors, (203007), 0 states have call successors, (0), 0 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 04:15:08,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67936 states to 67936 states and 203007 transitions. [2021-06-05 04:15:08,920 INFO L78 Accepts]: Start accepts. Automaton has 67936 states and 203007 transitions. Word has length 25 [2021-06-05 04:15:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:08,920 INFO L482 AbstractCegarLoop]: Abstraction has 67936 states and 203007 transitions. [2021-06-05 04:15:08,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 67936 states and 203007 transitions. [2021-06-05 04:15:08,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:08,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:08,968 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:09,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20247 [2021-06-05 04:15:09,168 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 648076050, now seen corresponding path program 446 times [2021-06-05 04:15:09,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:09,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059615184] [2021-06-05 04:15:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:09,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:09,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059615184] [2021-06-05 04:15:09,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059615184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:09,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198793285] [2021-06-05 04:15:09,231 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 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:09,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:09,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:09,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:09,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:09,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198793285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:09,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:09,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:15:09,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769363073] [2021-06-05 04:15:09,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:15:09,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:09,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:15:09,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:15:09,299 INFO L87 Difference]: Start difference. First operand 67936 states and 203007 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:09,599 INFO L93 Difference]: Finished difference Result 74376 states and 220879 transitions. [2021-06-05 04:15:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:15:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:09,731 INFO L225 Difference]: With dead ends: 74376 [2021-06-05 04:15:09,731 INFO L226 Difference]: Without dead ends: 74376 [2021-06-05 04:15:09,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:15:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74376 states. [2021-06-05 04:15:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74376 to 67967. [2021-06-05 04:15:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67967 states, 67966 states have (on average 2.988155842627196) internal successors, (203093), 67966 states have internal predecessors, (203093), 0 states have call successors, (0), 0 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 04:15:11,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67967 states to 67967 states and 203093 transitions. [2021-06-05 04:15:11,333 INFO L78 Accepts]: Start accepts. Automaton has 67967 states and 203093 transitions. Word has length 25 [2021-06-05 04:15:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:11,333 INFO L482 AbstractCegarLoop]: Abstraction has 67967 states and 203093 transitions. [2021-06-05 04:15:11,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 67967 states and 203093 transitions. [2021-06-05 04:15:11,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:11,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:11,379 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:11,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20248 [2021-06-05 04:15:11,579 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:11,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1080971284, now seen corresponding path program 447 times [2021-06-05 04:15:11,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:11,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057802838] [2021-06-05 04:15:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:11,637 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:11,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057802838] [2021-06-05 04:15:11,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057802838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:11,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837930317] [2021-06-05 04:15:11,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:11,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:15:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:11,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:11,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:11,705 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:11,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837930317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:11,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:11,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:15:11,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414861251] [2021-06-05 04:15:11,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:11,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:11,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:11,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:11,706 INFO L87 Difference]: Start difference. First operand 67967 states and 203093 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:12,042 INFO L93 Difference]: Finished difference Result 78884 states and 234170 transitions. [2021-06-05 04:15:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:15:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:12,192 INFO L225 Difference]: With dead ends: 78884 [2021-06-05 04:15:12,192 INFO L226 Difference]: Without dead ends: 78884 [2021-06-05 04:15:12,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:15:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78884 states. [2021-06-05 04:15:13,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78884 to 67988. [2021-06-05 04:15:13,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67988 states, 67987 states have (on average 2.988071248915234) internal successors, (203150), 67987 states have internal predecessors, (203150), 0 states have call successors, (0), 0 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 04:15:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67988 states to 67988 states and 203150 transitions. [2021-06-05 04:15:13,935 INFO L78 Accepts]: Start accepts. Automaton has 67988 states and 203150 transitions. Word has length 25 [2021-06-05 04:15:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:13,935 INFO L482 AbstractCegarLoop]: Abstraction has 67988 states and 203150 transitions. [2021-06-05 04:15:13,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 67988 states and 203150 transitions. [2021-06-05 04:15:13,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:13,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:13,986 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:14,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20249,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:14,186 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:14,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:14,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1153136210, now seen corresponding path program 448 times [2021-06-05 04:15:14,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:14,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998684678] [2021-06-05 04:15:14,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:14,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:14,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:14,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998684678] [2021-06-05 04:15:14,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998684678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:14,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617791385] [2021-06-05 04:15:14,252 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 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:14,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:14,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:14,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:14,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617791385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:14,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:14,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:15:14,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370156479] [2021-06-05 04:15:14,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:14,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:14,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:14,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:14,327 INFO L87 Difference]: Start difference. First operand 67988 states and 203150 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:14,803 INFO L93 Difference]: Finished difference Result 114424 states and 344057 transitions. [2021-06-05 04:15:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:15:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:14,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:15,062 INFO L225 Difference]: With dead ends: 114424 [2021-06-05 04:15:15,062 INFO L226 Difference]: Without dead ends: 114424 [2021-06-05 04:15:15,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 110.0ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:15,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114424 states. [2021-06-05 04:15:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114424 to 104105. [2021-06-05 04:15:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104105 states, 104104 states have (on average 3.02537846768616) internal successors, (314954), 104104 states have internal predecessors, (314954), 0 states have call successors, (0), 0 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 04:15:17,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104105 states to 104105 states and 314954 transitions. [2021-06-05 04:15:17,464 INFO L78 Accepts]: Start accepts. Automaton has 104105 states and 314954 transitions. Word has length 25 [2021-06-05 04:15:17,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:17,464 INFO L482 AbstractCegarLoop]: Abstraction has 104105 states and 314954 transitions. [2021-06-05 04:15:17,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 104105 states and 314954 transitions. [2021-06-05 04:15:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:17,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:17,531 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:17,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20250,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:17,731 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:17,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:17,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1690991788, now seen corresponding path program 449 times [2021-06-05 04:15:17,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:17,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795420399] [2021-06-05 04:15:17,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:17,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:17,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:17,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795420399] [2021-06-05 04:15:17,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795420399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:17,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067954655] [2021-06-05 04:15:17,800 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 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:17,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-05 04:15:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:17,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:17,868 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:17,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067954655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:17,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:17,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:15:17,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595260383] [2021-06-05 04:15:17,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:17,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:17,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:17,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:17,869 INFO L87 Difference]: Start difference. First operand 104105 states and 314954 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:18,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:18,736 INFO L93 Difference]: Finished difference Result 110268 states and 331729 transitions. [2021-06-05 04:15:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:15:18,736 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:18,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:18,969 INFO L225 Difference]: With dead ends: 110268 [2021-06-05 04:15:18,969 INFO L226 Difference]: Without dead ends: 110268 [2021-06-05 04:15:18,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110268 states. [2021-06-05 04:15:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110268 to 102357. [2021-06-05 04:15:20,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102357 states, 102356 states have (on average 3.0227539176990113) internal successors, (309397), 102356 states have internal predecessors, (309397), 0 states have call successors, (0), 0 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 04:15:21,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102357 states to 102357 states and 309397 transitions. [2021-06-05 04:15:21,305 INFO L78 Accepts]: Start accepts. Automaton has 102357 states and 309397 transitions. Word has length 25 [2021-06-05 04:15:21,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:21,305 INFO L482 AbstractCegarLoop]: Abstraction has 102357 states and 309397 transitions. [2021-06-05 04:15:21,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 102357 states and 309397 transitions. [2021-06-05 04:15:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:21,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:21,361 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:21,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20251,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:21,561 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:21,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1184645522, now seen corresponding path program 450 times [2021-06-05 04:15:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:21,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502498195] [2021-06-05 04:15:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:21,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:21,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502498195] [2021-06-05 04:15:21,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502498195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:21,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788508141] [2021-06-05 04:15:21,634 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 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:21,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-05 04:15:21,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:21,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:21,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788508141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:21,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:21,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:15:21,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474639473] [2021-06-05 04:15:21,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:21,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:21,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:21,704 INFO L87 Difference]: Start difference. First operand 102357 states and 309397 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:22,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:22,355 INFO L93 Difference]: Finished difference Result 187580 states and 568248 transitions. [2021-06-05 04:15:22,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:15:22,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:22,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:22,771 INFO L225 Difference]: With dead ends: 187580 [2021-06-05 04:15:22,771 INFO L226 Difference]: Without dead ends: 187580 [2021-06-05 04:15:22,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:15:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187580 states. [2021-06-05 04:15:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187580 to 185975. [2021-06-05 04:15:26,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185975 states, 185974 states have (on average 3.0363814296622107) internal successors, (564688), 185974 states have internal predecessors, (564688), 0 states have call successors, (0), 0 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 04:15:27,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185975 states to 185975 states and 564688 transitions. [2021-06-05 04:15:27,228 INFO L78 Accepts]: Start accepts. Automaton has 185975 states and 564688 transitions. Word has length 25 [2021-06-05 04:15:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:27,228 INFO L482 AbstractCegarLoop]: Abstraction has 185975 states and 564688 transitions. [2021-06-05 04:15:27,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 185975 states and 564688 transitions. [2021-06-05 04:15:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:27,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:27,318 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:27,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20252 [2021-06-05 04:15:27,518 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1627186836, now seen corresponding path program 451 times [2021-06-05 04:15:27,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:27,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711526128] [2021-06-05 04:15:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:27,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:27,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711526128] [2021-06-05 04:15:27,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711526128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:27,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075365280] [2021-06-05 04:15:27,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:27,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:27,663 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:27,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075365280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:27,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:27,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:27,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908871571] [2021-06-05 04:15:27,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:27,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:27,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:27,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:27,664 INFO L87 Difference]: Start difference. First operand 185975 states and 564688 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:28,446 INFO L93 Difference]: Finished difference Result 189635 states and 574166 transitions. [2021-06-05 04:15:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:15:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:29,504 INFO L225 Difference]: With dead ends: 189635 [2021-06-05 04:15:29,505 INFO L226 Difference]: Without dead ends: 189635 [2021-06-05 04:15:29,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:15:29,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-06-05 04:15:32,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 184848. [2021-06-05 04:15:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184848 states, 184847 states have (on average 3.036094716170671) internal successors, (561213), 184847 states have internal predecessors, (561213), 0 states have call successors, (0), 0 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 04:15:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184848 states to 184848 states and 561213 transitions. [2021-06-05 04:15:33,632 INFO L78 Accepts]: Start accepts. Automaton has 184848 states and 561213 transitions. Word has length 25 [2021-06-05 04:15:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:33,632 INFO L482 AbstractCegarLoop]: Abstraction has 184848 states and 561213 transitions. [2021-06-05 04:15:33,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 184848 states and 561213 transitions. [2021-06-05 04:15:33,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:33,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:33,719 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:33,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20253,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:33,920 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1400323282, now seen corresponding path program 452 times [2021-06-05 04:15:33,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:33,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692308336] [2021-06-05 04:15:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:34,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:34,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692308336] [2021-06-05 04:15:34,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692308336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:34,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002294662] [2021-06-05 04:15:34,003 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 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:34,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:15:34,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:34,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:34,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002294662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:34,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:34,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:34,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568212828] [2021-06-05 04:15:34,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:34,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:34,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:34,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:34,070 INFO L87 Difference]: Start difference. First operand 184848 states and 561213 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:35,839 INFO L93 Difference]: Finished difference Result 276211 states and 836546 transitions. [2021-06-05 04:15:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:15:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:36,492 INFO L225 Difference]: With dead ends: 276211 [2021-06-05 04:15:36,492 INFO L226 Difference]: Without dead ends: 276211 [2021-06-05 04:15:36,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 226.0ms TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:15:36,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276211 states. [2021-06-05 04:15:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276211 to 269074. [2021-06-05 04:15:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269074 states, 269073 states have (on average 3.036577434376545) internal successors, (817061), 269073 states have internal predecessors, (817061), 0 states have call successors, (0), 0 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 04:15:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269074 states to 269074 states and 817061 transitions. [2021-06-05 04:15:42,509 INFO L78 Accepts]: Start accepts. Automaton has 269074 states and 817061 transitions. Word has length 25 [2021-06-05 04:15:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:42,509 INFO L482 AbstractCegarLoop]: Abstraction has 269074 states and 817061 transitions. [2021-06-05 04:15:42,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 269074 states and 817061 transitions. [2021-06-05 04:15:42,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:42,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:42,601 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:42,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20254 [2021-06-05 04:15:42,801 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:42,801 INFO L82 PathProgramCache]: Analyzing trace with hash -239563868, now seen corresponding path program 453 times [2021-06-05 04:15:42,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:42,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592569253] [2021-06-05 04:15:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:42,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592569253] [2021-06-05 04:15:42,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592569253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744271223] [2021-06-05 04:15:42,879 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 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:42,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-05 04:15:42,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:42,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744271223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:42,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:42,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:15:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530406989] [2021-06-05 04:15:42,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:15:42,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:42,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:15:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:15:42,947 INFO L87 Difference]: Start difference. First operand 269074 states and 817061 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:44,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:44,756 INFO L93 Difference]: Finished difference Result 315035 states and 954004 transitions. [2021-06-05 04:15:44,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:15:44,757 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:45,546 INFO L225 Difference]: With dead ends: 315035 [2021-06-05 04:15:45,546 INFO L226 Difference]: Without dead ends: 315035 [2021-06-05 04:15:45,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:15:45,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315035 states. [2021-06-05 04:15:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315035 to 143842. [2021-06-05 04:15:49,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143842 states, 143841 states have (on average 3.0134732100027115) internal successors, (433461), 143841 states have internal predecessors, (433461), 0 states have call successors, (0), 0 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 04:15:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143842 states to 143842 states and 433461 transitions. [2021-06-05 04:15:50,369 INFO L78 Accepts]: Start accepts. Automaton has 143842 states and 433461 transitions. Word has length 25 [2021-06-05 04:15:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:50,369 INFO L482 AbstractCegarLoop]: Abstraction has 143842 states and 433461 transitions. [2021-06-05 04:15:50,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:50,369 INFO L276 IsEmpty]: Start isEmpty. Operand 143842 states and 433461 transitions. [2021-06-05 04:15:50,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:50,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:50,443 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:50,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20255 [2021-06-05 04:15:50,643 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:50,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:50,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1904292324, now seen corresponding path program 454 times [2021-06-05 04:15:50,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:50,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744198360] [2021-06-05 04:15:50,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:50,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:50,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744198360] [2021-06-05 04:15:50,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744198360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:50,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665571131] [2021-06-05 04:15:50,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:50,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:15:50,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:50,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:50,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:50,771 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:15:50,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665571131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:50,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:50,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:15:50,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53642909] [2021-06-05 04:15:50,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:15:50,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:50,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:15:50,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:15:50,771 INFO L87 Difference]: Start difference. First operand 143842 states and 433461 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:51,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:51,429 INFO L93 Difference]: Finished difference Result 173347 states and 520424 transitions. [2021-06-05 04:15:51,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:15:51,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:51,797 INFO L225 Difference]: With dead ends: 173347 [2021-06-05 04:15:51,797 INFO L226 Difference]: Without dead ends: 173347 [2021-06-05 04:15:51,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173347 states. [2021-06-05 04:15:54,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173347 to 144026. [2021-06-05 04:15:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144026 states, 144025 states have (on average 3.0132685297691375) internal successors, (433986), 144025 states have internal predecessors, (433986), 0 states have call successors, (0), 0 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 04:15:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144026 states to 144026 states and 433986 transitions. [2021-06-05 04:15:55,430 INFO L78 Accepts]: Start accepts. Automaton has 144026 states and 433986 transitions. Word has length 25 [2021-06-05 04:15:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:55,431 INFO L482 AbstractCegarLoop]: Abstraction has 144026 states and 433986 transitions. [2021-06-05 04:15:55,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:15:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 144026 states and 433986 transitions. [2021-06-05 04:15:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:15:55,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:15:55,504 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:15:55,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20256 [2021-06-05 04:15:55,705 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:15:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:15:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1852819394, now seen corresponding path program 455 times [2021-06-05 04:15:55,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:15:55,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954334329] [2021-06-05 04:15:55,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:15:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:15:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:55,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:15:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954334329] [2021-06-05 04:15:55,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954334329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:55,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092427893] [2021-06-05 04:15:55,772 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 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:15:55,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:15:55,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:15:55,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:15:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:15:55,841 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:15:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092427893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:15:55,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:15:55,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:15:55,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258832844] [2021-06-05 04:15:55,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:15:55,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:15:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:15:55,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:15:55,842 INFO L87 Difference]: Start difference. First operand 144026 states and 433986 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:56,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:15:56,867 INFO L93 Difference]: Finished difference Result 165051 states and 495636 transitions. [2021-06-05 04:15:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:15:56,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:15:56,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:15:57,217 INFO L225 Difference]: With dead ends: 165051 [2021-06-05 04:15:57,218 INFO L226 Difference]: Without dead ends: 165051 [2021-06-05 04:15:57,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:15:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165051 states. [2021-06-05 04:15:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165051 to 98547. [2021-06-05 04:15:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98547 states, 98546 states have (on average 3.001745377793112) internal successors, (295810), 98546 states have internal predecessors, (295810), 0 states have call successors, (0), 0 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 04:15:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98547 states to 98547 states and 295810 transitions. [2021-06-05 04:15:59,978 INFO L78 Accepts]: Start accepts. Automaton has 98547 states and 295810 transitions. Word has length 25 [2021-06-05 04:15:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:15:59,978 INFO L482 AbstractCegarLoop]: Abstraction has 98547 states and 295810 transitions. [2021-06-05 04:15:59,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:15:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 98547 states and 295810 transitions. [2021-06-05 04:16:00,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:00,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:00,030 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:00,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20257 [2021-06-05 04:16:00,230 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:00,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:00,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1935801636, now seen corresponding path program 456 times [2021-06-05 04:16:00,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:00,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651383819] [2021-06-05 04:16:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:00,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:00,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651383819] [2021-06-05 04:16:00,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651383819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:00,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430998133] [2021-06-05 04:16:00,302 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 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:00,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:00,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:00,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:00,369 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:00,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430998133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:00,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:00,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:16:00,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152566499] [2021-06-05 04:16:00,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:00,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:00,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:00,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:00,370 INFO L87 Difference]: Start difference. First operand 98547 states and 295810 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:01,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:01,377 INFO L93 Difference]: Finished difference Result 159493 states and 478171 transitions. [2021-06-05 04:16:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:16:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:01,691 INFO L225 Difference]: With dead ends: 159493 [2021-06-05 04:16:01,691 INFO L226 Difference]: Without dead ends: 159493 [2021-06-05 04:16:01,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:16:01,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159493 states. [2021-06-05 04:16:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159493 to 140825. [2021-06-05 04:16:04,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140825 states, 140824 states have (on average 3.008095211043572) internal successors, (423612), 140824 states have internal predecessors, (423612), 0 states have call successors, (0), 0 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 04:16:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140825 states to 140825 states and 423612 transitions. [2021-06-05 04:16:04,364 INFO L78 Accepts]: Start accepts. Automaton has 140825 states and 423612 transitions. Word has length 25 [2021-06-05 04:16:04,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:04,364 INFO L482 AbstractCegarLoop]: Abstraction has 140825 states and 423612 transitions. [2021-06-05 04:16:04,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 140825 states and 423612 transitions. [2021-06-05 04:16:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:04,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:04,434 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:04,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20258 [2021-06-05 04:16:04,635 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash -876030722, now seen corresponding path program 457 times [2021-06-05 04:16:04,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:04,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146738153] [2021-06-05 04:16:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:04,713 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:04,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:04,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146738153] [2021-06-05 04:16:04,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146738153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:04,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558584417] [2021-06-05 04:16:04,714 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 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:04,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:04,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:04,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558584417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:04,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:04,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:16:04,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067575653] [2021-06-05 04:16:04,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:16:04,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:04,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:16:04,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:04,779 INFO L87 Difference]: Start difference. First operand 140825 states and 423612 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:05,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:05,939 INFO L93 Difference]: Finished difference Result 166578 states and 499146 transitions. [2021-06-05 04:16:05,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:16:05,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:05,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:06,309 INFO L225 Difference]: With dead ends: 166578 [2021-06-05 04:16:06,309 INFO L226 Difference]: Without dead ends: 166578 [2021-06-05 04:16:06,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166578 states. [2021-06-05 04:16:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166578 to 88690. [2021-06-05 04:16:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88690 states, 88689 states have (on average 2.996685045496059) internal successors, (265773), 88689 states have internal predecessors, (265773), 0 states have call successors, (0), 0 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 04:16:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88690 states to 88690 states and 265773 transitions. [2021-06-05 04:16:08,693 INFO L78 Accepts]: Start accepts. Automaton has 88690 states and 265773 transitions. Word has length 25 [2021-06-05 04:16:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:08,693 INFO L482 AbstractCegarLoop]: Abstraction has 88690 states and 265773 transitions. [2021-06-05 04:16:08,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 88690 states and 265773 transitions. [2021-06-05 04:16:08,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:08,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:08,743 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:08,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20259,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:08,943 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487900, now seen corresponding path program 458 times [2021-06-05 04:16:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:08,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927588418] [2021-06-05 04:16:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:09,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:09,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927588418] [2021-06-05 04:16:09,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927588418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:09,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237595117] [2021-06-05 04:16:09,026 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 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:09,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:09,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:09,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:09,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237595117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:09,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:09,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:16:09,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086920440] [2021-06-05 04:16:09,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:16:09,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:09,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:16:09,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:09,092 INFO L87 Difference]: Start difference. First operand 88690 states and 265773 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:09,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:09,745 INFO L93 Difference]: Finished difference Result 132265 states and 395319 transitions. [2021-06-05 04:16:09,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 04:16:09,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:09,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:10,011 INFO L225 Difference]: With dead ends: 132265 [2021-06-05 04:16:10,011 INFO L226 Difference]: Without dead ends: 132265 [2021-06-05 04:16:10,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:16:10,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132265 states. [2021-06-05 04:16:11,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132265 to 75005. [2021-06-05 04:16:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75005 states, 75004 states have (on average 3.0035331448989386) internal successors, (225277), 75004 states have internal predecessors, (225277), 0 states have call successors, (0), 0 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 04:16:12,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75005 states to 75005 states and 225277 transitions. [2021-06-05 04:16:12,194 INFO L78 Accepts]: Start accepts. Automaton has 75005 states and 225277 transitions. Word has length 25 [2021-06-05 04:16:12,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:12,194 INFO L482 AbstractCegarLoop]: Abstraction has 75005 states and 225277 transitions. [2021-06-05 04:16:12,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 75005 states and 225277 transitions. [2021-06-05 04:16:12,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:12,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:12,239 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:12,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20260,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,439 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1062601334, now seen corresponding path program 459 times [2021-06-05 04:16:12,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:12,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309244726] [2021-06-05 04:16:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:12,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309244726] [2021-06-05 04:16:12,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309244726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192443381] [2021-06-05 04:16:12,510 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 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:12,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:12,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:12,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192443381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:12,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:12,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:16:12,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542741708] [2021-06-05 04:16:12,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:16:12,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:12,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:16:12,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:12,584 INFO L87 Difference]: Start difference. First operand 75005 states and 225277 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:12,884 INFO L93 Difference]: Finished difference Result 75445 states and 225722 transitions. [2021-06-05 04:16:12,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:16:12,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:12,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:13,014 INFO L225 Difference]: With dead ends: 75445 [2021-06-05 04:16:13,014 INFO L226 Difference]: Without dead ends: 75443 [2021-06-05 04:16:13,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:16:13,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75443 states. [2021-06-05 04:16:14,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75443 to 74587. [2021-06-05 04:16:14,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74587 states, 74586 states have (on average 3.0023462848255704) internal successors, (223933), 74586 states have internal predecessors, (223933), 0 states have call successors, (0), 0 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 04:16:14,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74587 states to 74587 states and 223933 transitions. [2021-06-05 04:16:14,630 INFO L78 Accepts]: Start accepts. Automaton has 74587 states and 223933 transitions. Word has length 25 [2021-06-05 04:16:14,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:14,630 INFO L482 AbstractCegarLoop]: Abstraction has 74587 states and 223933 transitions. [2021-06-05 04:16:14,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:14,630 INFO L276 IsEmpty]: Start isEmpty. Operand 74587 states and 223933 transitions. [2021-06-05 04:16:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:14,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:14,676 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:14,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20261 [2021-06-05 04:16:14,876 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash 420533604, now seen corresponding path program 460 times [2021-06-05 04:16:14,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:14,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213738447] [2021-06-05 04:16:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:14,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213738447] [2021-06-05 04:16:14,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213738447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:14,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008980558] [2021-06-05 04:16:14,956 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 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:14,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:14,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:14,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:14,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:15,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008980558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:15,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:15,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:16:15,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438639785] [2021-06-05 04:16:15,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:15,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:15,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:15,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:15,028 INFO L87 Difference]: Start difference. First operand 74587 states and 223933 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:15,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:15,414 INFO L93 Difference]: Finished difference Result 83574 states and 249816 transitions. [2021-06-05 04:16:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:16:15,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:15,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:15,555 INFO L225 Difference]: With dead ends: 83574 [2021-06-05 04:16:15,555 INFO L226 Difference]: Without dead ends: 83574 [2021-06-05 04:16:15,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:16:15,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83574 states. [2021-06-05 04:16:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83574 to 52866. [2021-06-05 04:16:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52866 states, 52865 states have (on average 2.989047574009269) internal successors, (158016), 52865 states have internal predecessors, (158016), 0 states have call successors, (0), 0 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 04:16:16,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52866 states to 52866 states and 158016 transitions. [2021-06-05 04:16:16,931 INFO L78 Accepts]: Start accepts. Automaton has 52866 states and 158016 transitions. Word has length 25 [2021-06-05 04:16:16,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:16,931 INFO L482 AbstractCegarLoop]: Abstraction has 52866 states and 158016 transitions. [2021-06-05 04:16:16,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:16,931 INFO L276 IsEmpty]: Start isEmpty. Operand 52866 states and 158016 transitions. [2021-06-05 04:16:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:16,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:16,968 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:17,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20262 [2021-06-05 04:16:17,169 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:17,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:17,169 INFO L82 PathProgramCache]: Analyzing trace with hash -846923574, now seen corresponding path program 461 times [2021-06-05 04:16:17,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:17,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234649483] [2021-06-05 04:16:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:17,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234649483] [2021-06-05 04:16:17,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234649483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703166616] [2021-06-05 04:16:17,493 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 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:17,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:17,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:17,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703166616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:17,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:17,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:16:17,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056748341] [2021-06-05 04:16:17,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:17,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:17,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:17,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:17,571 INFO L87 Difference]: Start difference. First operand 52866 states and 158016 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:18,038 INFO L93 Difference]: Finished difference Result 78034 states and 231687 transitions. [2021-06-05 04:16:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 04:16:18,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:18,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:18,171 INFO L225 Difference]: With dead ends: 78034 [2021-06-05 04:16:18,171 INFO L226 Difference]: Without dead ends: 78034 [2021-06-05 04:16:18,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 04:16:18,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-06-05 04:16:19,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 41286. [2021-06-05 04:16:19,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9907714666343708) internal successors, (123474), 41285 states have internal predecessors, (123474), 0 states have call successors, (0), 0 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 04:16:19,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123474 transitions. [2021-06-05 04:16:19,276 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123474 transitions. Word has length 25 [2021-06-05 04:16:19,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:19,276 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123474 transitions. [2021-06-05 04:16:19,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:19,276 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123474 transitions. [2021-06-05 04:16:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:19,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:19,310 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:19,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20263,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:19,510 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -41716956, now seen corresponding path program 462 times [2021-06-05 04:16:19,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:19,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315249812] [2021-06-05 04:16:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:19,559 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 04:16:19,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:19,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315249812] [2021-06-05 04:16:19,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315249812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735672793] [2021-06-05 04:16:19,559 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 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:19,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:19,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:19,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 04:16:19,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735672793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:19,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:19,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-05 04:16:19,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500360485] [2021-06-05 04:16:19,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:16:19,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:16:19,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:16:19,623 INFO L87 Difference]: Start difference. First operand 41286 states and 123474 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:19,868 INFO L93 Difference]: Finished difference Result 41661 states and 123915 transitions. [2021-06-05 04:16:19,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:16:19,868 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:19,924 INFO L225 Difference]: With dead ends: 41661 [2021-06-05 04:16:19,924 INFO L226 Difference]: Without dead ends: 41657 [2021-06-05 04:16:19,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-06-05 04:16:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41657 states. [2021-06-05 04:16:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41657 to 41286. [2021-06-05 04:16:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9906503572726173) internal successors, (123469), 41285 states have internal predecessors, (123469), 0 states have call successors, (0), 0 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 04:16:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123469 transitions. [2021-06-05 04:16:20,637 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123469 transitions. Word has length 25 [2021-06-05 04:16:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:20,637 INFO L482 AbstractCegarLoop]: Abstraction has 41286 states and 123469 transitions. [2021-06-05 04:16:20,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123469 transitions. [2021-06-05 04:16:20,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:20,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:20,669 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:20,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20264 [2021-06-05 04:16:20,870 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:20,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:20,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753060, now seen corresponding path program 463 times [2021-06-05 04:16:20,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:20,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898950920] [2021-06-05 04:16:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:20,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:20,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898950920] [2021-06-05 04:16:20,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898950920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:20,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221166869] [2021-06-05 04:16:20,953 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 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:20,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:20,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:21,025 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:21,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221166869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:21,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:21,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:16:21,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296062513] [2021-06-05 04:16:21,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:21,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:21,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:21,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:21,025 INFO L87 Difference]: Start difference. First operand 41286 states and 123469 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:21,423 INFO L93 Difference]: Finished difference Result 67989 states and 201876 transitions. [2021-06-05 04:16:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:21,533 INFO L225 Difference]: With dead ends: 67989 [2021-06-05 04:16:21,533 INFO L226 Difference]: Without dead ends: 67989 [2021-06-05 04:16:21,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 202.7ms TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:16:21,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67989 states. [2021-06-05 04:16:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67989 to 60015. [2021-06-05 04:16:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60015 states, 60014 states have (on average 2.994384643583164) internal successors, (179705), 60014 states have internal predecessors, (179705), 0 states have call successors, (0), 0 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 04:16:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60015 states to 60015 states and 179705 transitions. [2021-06-05 04:16:22,796 INFO L78 Accepts]: Start accepts. Automaton has 60015 states and 179705 transitions. Word has length 25 [2021-06-05 04:16:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:22,796 INFO L482 AbstractCegarLoop]: Abstraction has 60015 states and 179705 transitions. [2021-06-05 04:16:22,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 60015 states and 179705 transitions. [2021-06-05 04:16:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:23,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:23,084 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:23,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20265,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:23,284 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash 963120774, now seen corresponding path program 464 times [2021-06-05 04:16:23,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:23,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769685043] [2021-06-05 04:16:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:23,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:23,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769685043] [2021-06-05 04:16:23,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769685043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348564980] [2021-06-05 04:16:23,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:23,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:23,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:23,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348564980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710660855] [2021-06-05 04:16:23,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:23,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:23,401 INFO L87 Difference]: Start difference. First operand 60015 states and 179705 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:23,710 INFO L93 Difference]: Finished difference Result 60480 states and 180320 transitions. [2021-06-05 04:16:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:16:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:23,807 INFO L225 Difference]: With dead ends: 60480 [2021-06-05 04:16:23,807 INFO L226 Difference]: Without dead ends: 60476 [2021-06-05 04:16:23,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60476 states. [2021-06-05 04:16:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60476 to 60031. [2021-06-05 04:16:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60031 states, 60030 states have (on average 2.9940029985007497) internal successors, (179730), 60030 states have internal predecessors, (179730), 0 states have call successors, (0), 0 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 04:16:24,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60031 states to 60031 states and 179730 transitions. [2021-06-05 04:16:24,951 INFO L78 Accepts]: Start accepts. Automaton has 60031 states and 179730 transitions. Word has length 25 [2021-06-05 04:16:24,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:24,951 INFO L482 AbstractCegarLoop]: Abstraction has 60031 states and 179730 transitions. [2021-06-05 04:16:24,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:24,951 INFO L276 IsEmpty]: Start isEmpty. Operand 60031 states and 179730 transitions. [2021-06-05 04:16:24,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:24,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:24,991 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:25,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20266 [2021-06-05 04:16:25,192 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1614097462, now seen corresponding path program 465 times [2021-06-05 04:16:25,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:25,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6891164] [2021-06-05 04:16:25,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6891164] [2021-06-05 04:16:25,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6891164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751953513] [2021-06-05 04:16:25,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:25,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:16:25,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:25,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:25,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:25,314 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:25,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751953513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:25,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:25,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:16:25,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580871673] [2021-06-05 04:16:25,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:16:25,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:25,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:16:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:16:25,315 INFO L87 Difference]: Start difference. First operand 60031 states and 179730 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:25,587 INFO L93 Difference]: Finished difference Result 65631 states and 195205 transitions. [2021-06-05 04:16:25,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:16:25,587 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:25,696 INFO L225 Difference]: With dead ends: 65631 [2021-06-05 04:16:25,696 INFO L226 Difference]: Without dead ends: 65631 [2021-06-05 04:16:25,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:16:25,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65631 states. [2021-06-05 04:16:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65631 to 60041. [2021-06-05 04:16:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60041 states, 60040 states have (on average 2.9939373750832776) internal successors, (179756), 60040 states have internal predecessors, (179756), 0 states have call successors, (0), 0 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 04:16:26,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60041 states to 60041 states and 179756 transitions. [2021-06-05 04:16:26,875 INFO L78 Accepts]: Start accepts. Automaton has 60041 states and 179756 transitions. Word has length 25 [2021-06-05 04:16:26,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:26,875 INFO L482 AbstractCegarLoop]: Abstraction has 60041 states and 179756 transitions. [2021-06-05 04:16:26,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 60041 states and 179756 transitions. [2021-06-05 04:16:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:26,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:26,917 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:27,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20267,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:27,117 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:27,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:27,118 INFO L82 PathProgramCache]: Analyzing trace with hash 951822500, now seen corresponding path program 466 times [2021-06-05 04:16:27,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:27,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819736474] [2021-06-05 04:16:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:27,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:27,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:27,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819736474] [2021-06-05 04:16:27,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819736474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749583458] [2021-06-05 04:16:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:27,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:27,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:27,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:27,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749583458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:27,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:27,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-06-05 04:16:27,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880049155] [2021-06-05 04:16:27,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:16:27,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:16:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:16:27,451 INFO L87 Difference]: Start difference. First operand 60041 states and 179756 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:27,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:27,756 INFO L93 Difference]: Finished difference Result 70196 states and 208624 transitions. [2021-06-05 04:16:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:16:27,756 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:27,873 INFO L225 Difference]: With dead ends: 70196 [2021-06-05 04:16:27,873 INFO L226 Difference]: Without dead ends: 70196 [2021-06-05 04:16:27,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:27,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70196 states. [2021-06-05 04:16:28,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70196 to 60079. [2021-06-05 04:16:28,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9939412097606444) internal successors, (179870), 60078 states have internal predecessors, (179870), 0 states have call successors, (0), 0 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 04:16:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 179870 transitions. [2021-06-05 04:16:29,078 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 179870 transitions. Word has length 25 [2021-06-05 04:16:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:29,078 INFO L482 AbstractCegarLoop]: Abstraction has 60079 states and 179870 transitions. [2021-06-05 04:16:29,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 179870 transitions. [2021-06-05 04:16:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:29,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:29,119 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:29,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20268 [2021-06-05 04:16:29,319 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1109037302, now seen corresponding path program 467 times [2021-06-05 04:16:29,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:29,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275834551] [2021-06-05 04:16:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:29,380 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275834551] [2021-06-05 04:16:29,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275834551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280485785] [2021-06-05 04:16:29,380 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 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:29,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:29,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:29,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:29,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:29,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280485785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:29,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:29,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:16:29,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127667750] [2021-06-05 04:16:29,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:29,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:29,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:29,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:29,453 INFO L87 Difference]: Start difference. First operand 60079 states and 179870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:29,788 INFO L93 Difference]: Finished difference Result 72590 states and 215734 transitions. [2021-06-05 04:16:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:29,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:29,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:29,908 INFO L225 Difference]: With dead ends: 72590 [2021-06-05 04:16:29,908 INFO L226 Difference]: Without dead ends: 72590 [2021-06-05 04:16:29,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 127.3ms TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2021-06-05 04:16:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 59829. [2021-06-05 04:16:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59829 states, 59828 states have (on average 2.9930968777161198) internal successors, (179071), 59828 states have internal predecessors, (179071), 0 states have call successors, (0), 0 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 04:16:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59829 states to 59829 states and 179071 transitions. [2021-06-05 04:16:31,380 INFO L78 Accepts]: Start accepts. Automaton has 59829 states and 179071 transitions. Word has length 25 [2021-06-05 04:16:31,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:31,380 INFO L482 AbstractCegarLoop]: Abstraction has 59829 states and 179071 transitions. [2021-06-05 04:16:31,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:31,380 INFO L276 IsEmpty]: Start isEmpty. Operand 59829 states and 179071 transitions. [2021-06-05 04:16:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:31,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:31,429 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:31,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20269,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:31,630 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash -571181724, now seen corresponding path program 468 times [2021-06-05 04:16:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:31,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770722273] [2021-06-05 04:16:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:31,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770722273] [2021-06-05 04:16:31,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770722273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:31,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176752262] [2021-06-05 04:16:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:31,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:16:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:31,768 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:31,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176752262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:31,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:31,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-06-05 04:16:31,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969994927] [2021-06-05 04:16:31,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:31,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:31,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:31,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:31,769 INFO L87 Difference]: Start difference. First operand 59829 states and 179071 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:32,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:32,165 INFO L93 Difference]: Finished difference Result 93593 states and 280293 transitions. [2021-06-05 04:16:32,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:32,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:32,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:32,332 INFO L225 Difference]: With dead ends: 93593 [2021-06-05 04:16:32,332 INFO L226 Difference]: Without dead ends: 93593 [2021-06-05 04:16:32,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93593 states. [2021-06-05 04:16:33,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93593 to 82993. [2021-06-05 04:16:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82993 states, 82992 states have (on average 3.016278677462888) internal successors, (250327), 82992 states have internal predecessors, (250327), 0 states have call successors, (0), 0 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 04:16:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82993 states to 82993 states and 250327 transitions. [2021-06-05 04:16:33,901 INFO L78 Accepts]: Start accepts. Automaton has 82993 states and 250327 transitions. Word has length 25 [2021-06-05 04:16:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:33,901 INFO L482 AbstractCegarLoop]: Abstraction has 82993 states and 250327 transitions. [2021-06-05 04:16:33,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 82993 states and 250327 transitions. [2021-06-05 04:16:34,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:34,171 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:34,171 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:34,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20270,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:34,387 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:34,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1077527990, now seen corresponding path program 469 times [2021-06-05 04:16:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:34,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628449127] [2021-06-05 04:16:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:34,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:34,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628449127] [2021-06-05 04:16:34,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628449127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42077939] [2021-06-05 04:16:34,459 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 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:34,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:34,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42077939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:34,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:34,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:16:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83262882] [2021-06-05 04:16:34,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:16:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:16:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:34,531 INFO L87 Difference]: Start difference. First operand 82993 states and 250327 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:34,921 INFO L93 Difference]: Finished difference Result 90382 states and 270822 transitions. [2021-06-05 04:16:34,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:16:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:35,080 INFO L225 Difference]: With dead ends: 90382 [2021-06-05 04:16:35,081 INFO L226 Difference]: Without dead ends: 90382 [2021-06-05 04:16:35,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:16:35,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90382 states. [2021-06-05 04:16:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90382 to 81151. [2021-06-05 04:16:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81151 states, 81150 states have (on average 3.0145532963647566) internal successors, (244631), 81150 states have internal predecessors, (244631), 0 states have call successors, (0), 0 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 04:16:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81151 states to 81151 states and 244631 transitions. [2021-06-05 04:16:36,554 INFO L78 Accepts]: Start accepts. Automaton has 81151 states and 244631 transitions. Word has length 25 [2021-06-05 04:16:36,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:36,554 INFO L482 AbstractCegarLoop]: Abstraction has 81151 states and 244631 transitions. [2021-06-05 04:16:36,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:36,554 INFO L276 IsEmpty]: Start isEmpty. Operand 81151 states and 244631 transitions. [2021-06-05 04:16:36,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:36,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:36,603 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:36,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20271 [2021-06-05 04:16:36,804 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash 405606948, now seen corresponding path program 470 times [2021-06-05 04:16:36,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:36,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707914827] [2021-06-05 04:16:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:36,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:36,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707914827] [2021-06-05 04:16:36,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707914827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597366191] [2021-06-05 04:16:36,880 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 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:36,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:16:36,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:36,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:36,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:36,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597366191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:36,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:36,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-06-05 04:16:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734504111] [2021-06-05 04:16:36,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:16:36,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:36,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:16:36,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:16:36,956 INFO L87 Difference]: Start difference. First operand 81151 states and 244631 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:37,742 INFO L93 Difference]: Finished difference Result 141608 states and 426442 transitions. [2021-06-05 04:16:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 04:16:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:38,061 INFO L225 Difference]: With dead ends: 141608 [2021-06-05 04:16:38,061 INFO L226 Difference]: Without dead ends: 141608 [2021-06-05 04:16:38,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:16:38,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141608 states. [2021-06-05 04:16:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141608 to 133805. [2021-06-05 04:16:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133805 states, 133804 states have (on average 3.0223685390571284) internal successors, (404405), 133804 states have internal predecessors, (404405), 0 states have call successors, (0), 0 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 04:16:40,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133805 states to 133805 states and 404405 transitions. [2021-06-05 04:16:40,964 INFO L78 Accepts]: Start accepts. Automaton has 133805 states and 404405 transitions. Word has length 25 [2021-06-05 04:16:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:40,964 INFO L482 AbstractCegarLoop]: Abstraction has 133805 states and 404405 transitions. [2021-06-05 04:16:40,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 133805 states and 404405 transitions. [2021-06-05 04:16:41,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:41,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:41,038 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:41,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20272,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:41,239 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash -861850230, now seen corresponding path program 471 times [2021-06-05 04:16:41,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:41,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008202309] [2021-06-05 04:16:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:41,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:41,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008202309] [2021-06-05 04:16:41,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008202309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:41,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689565166] [2021-06-05 04:16:41,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:41,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-05 04:16:41,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:41,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689565166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:41,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:41,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:16:41,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020508286] [2021-06-05 04:16:41,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:41,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:41,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:41,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:41,399 INFO L87 Difference]: Start difference. First operand 133805 states and 404405 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:42,498 INFO L93 Difference]: Finished difference Result 143196 states and 430987 transitions. [2021-06-05 04:16:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 04:16:42,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:42,818 INFO L225 Difference]: With dead ends: 143196 [2021-06-05 04:16:42,818 INFO L226 Difference]: Without dead ends: 143196 [2021-06-05 04:16:42,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:16:42,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143196 states. [2021-06-05 04:16:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143196 to 132675. [2021-06-05 04:16:45,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132675 states, 132674 states have (on average 3.022378160001206) internal successors, (400991), 132674 states have internal predecessors, (400991), 0 states have call successors, (0), 0 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 04:16:45,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132675 states to 132675 states and 400991 transitions. [2021-06-05 04:16:45,703 INFO L78 Accepts]: Start accepts. Automaton has 132675 states and 400991 transitions. Word has length 25 [2021-06-05 04:16:45,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:45,704 INFO L482 AbstractCegarLoop]: Abstraction has 132675 states and 400991 transitions. [2021-06-05 04:16:45,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 132675 states and 400991 transitions. [2021-06-05 04:16:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:45,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:45,774 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:45,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20273,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:45,975 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1498317084, now seen corresponding path program 472 times [2021-06-05 04:16:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:45,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628634516] [2021-06-05 04:16:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:46,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:46,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628634516] [2021-06-05 04:16:46,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628634516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:46,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169959627] [2021-06-05 04:16:46,062 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 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:46,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:16:46,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:46,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:46,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169959627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:46,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:46,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-06-05 04:16:46,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151094552] [2021-06-05 04:16:46,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:46,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:46,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:46,135 INFO L87 Difference]: Start difference. First operand 132675 states and 400991 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:47,434 INFO L93 Difference]: Finished difference Result 189263 states and 569984 transitions. [2021-06-05 04:16:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 04:16:47,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:47,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:47,867 INFO L225 Difference]: With dead ends: 189263 [2021-06-05 04:16:47,867 INFO L226 Difference]: Without dead ends: 189263 [2021-06-05 04:16:47,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=705, Invalid=1365, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:16:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189263 states. [2021-06-05 04:16:51,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189263 to 176221. [2021-06-05 04:16:51,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176221 states, 176220 states have (on average 3.024032459425718) internal successors, (532895), 176220 states have internal predecessors, (532895), 0 states have call successors, (0), 0 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 04:16:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176221 states to 176221 states and 532895 transitions. [2021-06-05 04:16:51,983 INFO L78 Accepts]: Start accepts. Automaton has 176221 states and 532895 transitions. Word has length 25 [2021-06-05 04:16:51,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:51,983 INFO L482 AbstractCegarLoop]: Abstraction has 176221 states and 532895 transitions. [2021-06-05 04:16:51,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:51,984 INFO L276 IsEmpty]: Start isEmpty. Operand 176221 states and 532895 transitions. [2021-06-05 04:16:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:52,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:52,060 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:52,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20274 [2021-06-05 04:16:52,260 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:52,260 INFO L82 PathProgramCache]: Analyzing trace with hash -795211182, now seen corresponding path program 473 times [2021-06-05 04:16:52,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:52,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496894957] [2021-06-05 04:16:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:52,345 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:52,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496894957] [2021-06-05 04:16:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496894957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:52,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057601170] [2021-06-05 04:16:52,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:52,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:16:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:52,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:16:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057601170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:52,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:52,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:16:52,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661065337] [2021-06-05 04:16:52,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:16:52,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:52,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:16:52,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:16:52,414 INFO L87 Difference]: Start difference. First operand 176221 states and 532895 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:53,865 INFO L93 Difference]: Finished difference Result 207060 states and 624206 transitions. [2021-06-05 04:16:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:16:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:54,320 INFO L225 Difference]: With dead ends: 207060 [2021-06-05 04:16:54,321 INFO L226 Difference]: Without dead ends: 207060 [2021-06-05 04:16:54,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 200.3ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 04:16:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207060 states. [2021-06-05 04:16:56,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207060 to 97070. [2021-06-05 04:16:56,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97070 states, 97069 states have (on average 3.0073864982641214) internal successors, (291924), 97069 states have internal predecessors, (291924), 0 states have call successors, (0), 0 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 04:16:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97070 states to 97070 states and 291924 transitions. [2021-06-05 04:16:57,155 INFO L78 Accepts]: Start accepts. Automaton has 97070 states and 291924 transitions. Word has length 25 [2021-06-05 04:16:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:16:57,155 INFO L482 AbstractCegarLoop]: Abstraction has 97070 states and 291924 transitions. [2021-06-05 04:16:57,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:16:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 97070 states and 291924 transitions. [2021-06-05 04:16:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:16:57,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:16:57,206 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:16:57,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20275,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:57,407 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:16:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:16:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1239821330, now seen corresponding path program 474 times [2021-06-05 04:16:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:16:57,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751332046] [2021-06-05 04:16:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:16:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:16:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:57,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:16:57,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751332046] [2021-06-05 04:16:57,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751332046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190482662] [2021-06-05 04:16:57,473 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 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:16:57,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:16:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:16:57,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:16:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:16:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:16:57,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190482662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:16:57,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:16:57,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:16:57,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904334488] [2021-06-05 04:16:57,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:16:57,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:16:57,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:16:57,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:16:57,540 INFO L87 Difference]: Start difference. First operand 97070 states and 291924 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:16:58,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:16:58,390 INFO L93 Difference]: Finished difference Result 117254 states and 351156 transitions. [2021-06-05 04:16:58,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 04:16:58,391 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:16:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:16:58,622 INFO L225 Difference]: With dead ends: 117254 [2021-06-05 04:16:58,622 INFO L226 Difference]: Without dead ends: 117253 [2021-06-05 04:16:58,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2021-06-05 04:16:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117253 states. [2021-06-05 04:17:00,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117253 to 97245. [2021-06-05 04:17:00,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97245 states, 97244 states have (on average 3.0071264036855743) internal successors, (292425), 97244 states have internal predecessors, (292425), 0 states have call successors, (0), 0 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 04:17:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97245 states to 97245 states and 292425 transitions. [2021-06-05 04:17:00,366 INFO L78 Accepts]: Start accepts. Automaton has 97245 states and 292425 transitions. Word has length 25 [2021-06-05 04:17:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:00,366 INFO L482 AbstractCegarLoop]: Abstraction has 97245 states and 292425 transitions. [2021-06-05 04:17:00,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 97245 states and 292425 transitions. [2021-06-05 04:17:00,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:00,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:00,416 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:00,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20276 [2021-06-05 04:17:00,616 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:00,616 INFO L82 PathProgramCache]: Analyzing trace with hash 733475064, now seen corresponding path program 475 times [2021-06-05 04:17:00,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:00,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679766669] [2021-06-05 04:17:00,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,689 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:00,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679766669] [2021-06-05 04:17:00,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679766669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14189783] [2021-06-05 04:17:00,689 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 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14189783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:00,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:00,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:17:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755704426] [2021-06-05 04:17:00,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:17:00,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:00,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:17:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:00,753 INFO L87 Difference]: Start difference. First operand 97245 states and 292425 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:01,551 INFO L93 Difference]: Finished difference Result 110340 states and 330613 transitions. [2021-06-05 04:17:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:01,769 INFO L225 Difference]: With dead ends: 110340 [2021-06-05 04:17:01,769 INFO L226 Difference]: Without dead ends: 110339 [2021-06-05 04:17:01,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110339 states. [2021-06-05 04:17:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110339 to 68102. [2021-06-05 04:17:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68102 states, 68101 states have (on average 3.0012187779915127) internal successors, (204386), 68101 states have internal predecessors, (204386), 0 states have call successors, (0), 0 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 04:17:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68102 states to 68102 states and 204386 transitions. [2021-06-05 04:17:03,522 INFO L78 Accepts]: Start accepts. Automaton has 68102 states and 204386 transitions. Word has length 25 [2021-06-05 04:17:03,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:03,522 INFO L482 AbstractCegarLoop]: Abstraction has 68102 states and 204386 transitions. [2021-06-05 04:17:03,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:03,522 INFO L276 IsEmpty]: Start isEmpty. Operand 68102 states and 204386 transitions. [2021-06-05 04:17:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:03,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:03,564 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:03,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20277,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,764 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:03,764 INFO L82 PathProgramCache]: Analyzing trace with hash -2078357294, now seen corresponding path program 476 times [2021-06-05 04:17:03,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546071208] [2021-06-05 04:17:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:03,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546071208] [2021-06-05 04:17:03,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546071208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695561944] [2021-06-05 04:17:03,842 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 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:03,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:03,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:03,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:03,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695561944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:03,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:03,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:17:03,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891384839] [2021-06-05 04:17:03,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:17:03,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:03,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:17:03,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:03,908 INFO L87 Difference]: Start difference. First operand 68102 states and 204386 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:04,534 INFO L93 Difference]: Finished difference Result 95816 states and 286428 transitions. [2021-06-05 04:17:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:17:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:04,714 INFO L225 Difference]: With dead ends: 95816 [2021-06-05 04:17:04,715 INFO L226 Difference]: Without dead ends: 95815 [2021-06-05 04:17:04,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95815 states. [2021-06-05 04:17:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95815 to 81199. [2021-06-05 04:17:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81199 states, 81198 states have (on average 3.002746373063376) internal successors, (243817), 81198 states have internal predecessors, (243817), 0 states have call successors, (0), 0 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 04:17:06,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81199 states to 81199 states and 243817 transitions. [2021-06-05 04:17:06,441 INFO L78 Accepts]: Start accepts. Automaton has 81199 states and 243817 transitions. Word has length 25 [2021-06-05 04:17:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:06,442 INFO L482 AbstractCegarLoop]: Abstraction has 81199 states and 243817 transitions. [2021-06-05 04:17:06,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 81199 states and 243817 transitions. [2021-06-05 04:17:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:06,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:06,484 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:06,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20278 [2021-06-05 04:17:06,685 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 949152824, now seen corresponding path program 477 times [2021-06-05 04:17:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:06,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838177577] [2021-06-05 04:17:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:06,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838177577] [2021-06-05 04:17:06,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838177577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377483642] [2021-06-05 04:17:06,772 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 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:06,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:06,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:06,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:06,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:06,839 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:06,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377483642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:06,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:06,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:17:06,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075417908] [2021-06-05 04:17:06,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:17:06,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:06,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:17:06,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:06,840 INFO L87 Difference]: Start difference. First operand 81199 states and 243817 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:07,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:07,591 INFO L93 Difference]: Finished difference Result 99184 states and 296306 transitions. [2021-06-05 04:17:07,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:07,591 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:07,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:07,791 INFO L225 Difference]: With dead ends: 99184 [2021-06-05 04:17:07,792 INFO L226 Difference]: Without dead ends: 99184 [2021-06-05 04:17:07,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 432.9ms TimeCoverageRelationStatistics Valid=372, Invalid=750, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 04:17:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99184 states. [2021-06-05 04:17:09,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99184 to 51922. [2021-06-05 04:17:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51922 states, 51921 states have (on average 2.997496196144142) internal successors, (155633), 51921 states have internal predecessors, (155633), 0 states have call successors, (0), 0 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 04:17:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51922 states to 51922 states and 155633 transitions. [2021-06-05 04:17:09,288 INFO L78 Accepts]: Start accepts. Automaton has 51922 states and 155633 transitions. Word has length 25 [2021-06-05 04:17:09,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:09,288 INFO L482 AbstractCegarLoop]: Abstraction has 51922 states and 155633 transitions. [2021-06-05 04:17:09,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51922 states and 155633 transitions. [2021-06-05 04:17:09,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:09,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:09,323 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:09,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20279 [2021-06-05 04:17:09,523 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash 312685970, now seen corresponding path program 478 times [2021-06-05 04:17:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:09,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499256471] [2021-06-05 04:17:09,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499256471] [2021-06-05 04:17:09,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499256471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115504448] [2021-06-05 04:17:09,611 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 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:09,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:09,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:09,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:09,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115504448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:09,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:09,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:17:09,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238357539] [2021-06-05 04:17:09,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:17:09,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:09,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:17:09,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:09,675 INFO L87 Difference]: Start difference. First operand 51922 states and 155633 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:10,400 INFO L93 Difference]: Finished difference Result 71392 states and 212338 transitions. [2021-06-05 04:17:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 04:17:10,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:10,515 INFO L225 Difference]: With dead ends: 71392 [2021-06-05 04:17:10,515 INFO L226 Difference]: Without dead ends: 71392 [2021-06-05 04:17:10,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=704, Invalid=1366, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 04:17:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71392 states. [2021-06-05 04:17:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71392 to 37505. [2021-06-05 04:17:11,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37505 states, 37504 states have (on average 3.01471843003413) internal successors, (113064), 37504 states have internal predecessors, (113064), 0 states have call successors, (0), 0 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 04:17:11,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37505 states to 37505 states and 113064 transitions. [2021-06-05 04:17:11,505 INFO L78 Accepts]: Start accepts. Automaton has 37505 states and 113064 transitions. Word has length 25 [2021-06-05 04:17:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:11,505 INFO L482 AbstractCegarLoop]: Abstraction has 37505 states and 113064 transitions. [2021-06-05 04:17:11,505 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:11,505 INFO L276 IsEmpty]: Start isEmpty. Operand 37505 states and 113064 transitions. [2021-06-05 04:17:11,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:11,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:11,531 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:11,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20280,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:11,732 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash -539568852, now seen corresponding path program 479 times [2021-06-05 04:17:11,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:11,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105874091] [2021-06-05 04:17:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:11,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:11,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105874091] [2021-06-05 04:17:11,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105874091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002008561] [2021-06-05 04:17:11,808 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 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:11,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 04:17:11,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:11,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:11,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002008561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:11,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:11,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:17:11,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604204397] [2021-06-05 04:17:11,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:17:11,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:17:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:11,874 INFO L87 Difference]: Start difference. First operand 37505 states and 113064 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:12,103 INFO L93 Difference]: Finished difference Result 52340 states and 156866 transitions. [2021-06-05 04:17:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:17:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:12,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:12,186 INFO L225 Difference]: With dead ends: 52340 [2021-06-05 04:17:12,186 INFO L226 Difference]: Without dead ends: 52340 [2021-06-05 04:17:12,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-06-05 04:17:12,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52340 states. [2021-06-05 04:17:12,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52340 to 51574. [2021-06-05 04:17:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51574 states, 51573 states have (on average 3.01365055358424) internal successors, (155423), 51573 states have internal predecessors, (155423), 0 states have call successors, (0), 0 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 04:17:13,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51574 states to 51574 states and 155423 transitions. [2021-06-05 04:17:13,132 INFO L78 Accepts]: Start accepts. Automaton has 51574 states and 155423 transitions. Word has length 25 [2021-06-05 04:17:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:13,132 INFO L482 AbstractCegarLoop]: Abstraction has 51574 states and 155423 transitions. [2021-06-05 04:17:13,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:13,132 INFO L276 IsEmpty]: Start isEmpty. Operand 51574 states and 155423 transitions. [2021-06-05 04:17:13,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:13,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:13,166 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:13,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20281,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,366 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:13,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1807026030, now seen corresponding path program 480 times [2021-06-05 04:17:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:13,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984866339] [2021-06-05 04:17:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984866339] [2021-06-05 04:17:13,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984866339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942777422] [2021-06-05 04:17:13,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:13,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 04:17:13,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:13,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:13,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:13,519 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:13,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942777422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:13,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:13,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:17:13,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100762546] [2021-06-05 04:17:13,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:17:13,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:13,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:17:13,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:13,520 INFO L87 Difference]: Start difference. First operand 51574 states and 155423 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:13,832 INFO L93 Difference]: Finished difference Result 53707 states and 160765 transitions. [2021-06-05 04:17:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 04:17:13,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:13,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:13,920 INFO L225 Difference]: With dead ends: 53707 [2021-06-05 04:17:13,920 INFO L226 Difference]: Without dead ends: 53707 [2021-06-05 04:17:13,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53707 states. [2021-06-05 04:17:14,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53707 to 50319. [2021-06-05 04:17:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50319 states, 50318 states have (on average 3.013335188203029) internal successors, (151625), 50318 states have internal predecessors, (151625), 0 states have call successors, (0), 0 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 04:17:14,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50319 states to 50319 states and 151625 transitions. [2021-06-05 04:17:14,864 INFO L78 Accepts]: Start accepts. Automaton has 50319 states and 151625 transitions. Word has length 25 [2021-06-05 04:17:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:14,864 INFO L482 AbstractCegarLoop]: Abstraction has 50319 states and 151625 transitions. [2021-06-05 04:17:14,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 50319 states and 151625 transitions. [2021-06-05 04:17:14,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:14,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:14,900 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20282,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:15,100 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1851474412, now seen corresponding path program 481 times [2021-06-05 04:17:15,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:15,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770860690] [2021-06-05 04:17:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770860690] [2021-06-05 04:17:15,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770860690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066254252] [2021-06-05 04:17:15,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:15,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:15,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:15,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066254252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:15,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:15,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:17:15,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284170939] [2021-06-05 04:17:15,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:17:15,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:15,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:17:15,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:15,254 INFO L87 Difference]: Start difference. First operand 50319 states and 151625 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:15,758 INFO L93 Difference]: Finished difference Result 83659 states and 251011 transitions. [2021-06-05 04:17:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 04:17:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:15,904 INFO L225 Difference]: With dead ends: 83659 [2021-06-05 04:17:15,904 INFO L226 Difference]: Without dead ends: 83659 [2021-06-05 04:17:15,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 258.7ms TimeCoverageRelationStatistics Valid=647, Invalid=1245, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 04:17:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83659 states. [2021-06-05 04:17:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83659 to 76370. [2021-06-05 04:17:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76370 states, 76369 states have (on average 3.019720043473137) internal successors, (230613), 76369 states have internal predecessors, (230613), 0 states have call successors, (0), 0 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 04:17:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76370 states to 76370 states and 230613 transitions. [2021-06-05 04:17:17,523 INFO L78 Accepts]: Start accepts. Automaton has 76370 states and 230613 transitions. Word has length 25 [2021-06-05 04:17:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:17,523 INFO L482 AbstractCegarLoop]: Abstraction has 76370 states and 230613 transitions. [2021-06-05 04:17:17,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 76370 states and 230613 transitions. [2021-06-05 04:17:17,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:17,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:17,565 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:17,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20283,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,765 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:17,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:17,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1146928558, now seen corresponding path program 482 times [2021-06-05 04:17:17,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:17,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909268290] [2021-06-05 04:17:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:17,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:17,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909268290] [2021-06-05 04:17:17,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909268290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952234762] [2021-06-05 04:17:17,855 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 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:17,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:17,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:17,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:17,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:17,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952234762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:17,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:17,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-05 04:17:17,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016109511] [2021-06-05 04:17:17,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 04:17:17,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:17,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 04:17:17,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:17:17,920 INFO L87 Difference]: Start difference. First operand 76370 states and 230613 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:18,611 INFO L93 Difference]: Finished difference Result 149041 states and 447830 transitions. [2021-06-05 04:17:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 04:17:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:18,935 INFO L225 Difference]: With dead ends: 149041 [2021-06-05 04:17:18,935 INFO L226 Difference]: Without dead ends: 149041 [2021-06-05 04:17:18,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 04:17:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149041 states. [2021-06-05 04:17:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149041 to 142483. [2021-06-05 04:17:21,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142483 states, 142482 states have (on average 3.0140017686444605) internal successors, (429441), 142482 states have internal predecessors, (429441), 0 states have call successors, (0), 0 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 04:17:21,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142483 states to 142483 states and 429441 transitions. [2021-06-05 04:17:21,992 INFO L78 Accepts]: Start accepts. Automaton has 142483 states and 429441 transitions. Word has length 25 [2021-06-05 04:17:21,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:21,992 INFO L482 AbstractCegarLoop]: Abstraction has 142483 states and 429441 transitions. [2021-06-05 04:17:21,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:21,992 INFO L276 IsEmpty]: Start isEmpty. Operand 142483 states and 429441 transitions. [2021-06-05 04:17:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:22,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:22,065 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:22,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20284,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,265 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:22,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:22,265 INFO L82 PathProgramCache]: Analyzing trace with hash -444781362, now seen corresponding path program 483 times [2021-06-05 04:17:22,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:22,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085344831] [2021-06-05 04:17:22,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:22,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085344831] [2021-06-05 04:17:22,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085344831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987545150] [2021-06-05 04:17:22,320 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 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:22,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:22,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:22,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:22,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987545150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:22,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:22,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:22,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130149616] [2021-06-05 04:17:22,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:22,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:22,382 INFO L87 Difference]: Start difference. First operand 142483 states and 429441 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:22,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:22,992 INFO L93 Difference]: Finished difference Result 142894 states and 429992 transitions. [2021-06-05 04:17:22,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 04:17:22,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:22,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:23,277 INFO L225 Difference]: With dead ends: 142894 [2021-06-05 04:17:23,278 INFO L226 Difference]: Without dead ends: 142890 [2021-06-05 04:17:23,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-06-05 04:17:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142890 states. [2021-06-05 04:17:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142890 to 142503. [2021-06-05 04:17:25,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142503 states, 142502 states have (on average 3.0139226116124687) internal successors, (429490), 142502 states have internal predecessors, (429490), 0 states have call successors, (0), 0 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 04:17:26,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142503 states to 142503 states and 429490 transitions. [2021-06-05 04:17:26,591 INFO L78 Accepts]: Start accepts. Automaton has 142503 states and 429490 transitions. Word has length 25 [2021-06-05 04:17:26,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:26,591 INFO L482 AbstractCegarLoop]: Abstraction has 142503 states and 429490 transitions. [2021-06-05 04:17:26,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 142503 states and 429490 transitions. [2021-06-05 04:17:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:26,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:26,705 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:26,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20285,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:26,913 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:26,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:26,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1272967698, now seen corresponding path program 484 times [2021-06-05 04:17:26,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:26,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541967454] [2021-06-05 04:17:26,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:26,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541967454] [2021-06-05 04:17:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541967454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977479360] [2021-06-05 04:17:26,967 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 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:26,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:17:26,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:26,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:26,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:27,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977479360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:27,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:27,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-05 04:17:27,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666328552] [2021-06-05 04:17:27,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:17:27,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:27,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:17:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:17:27,032 INFO L87 Difference]: Start difference. First operand 142503 states and 429490 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:27,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:27,598 INFO L93 Difference]: Finished difference Result 152571 states and 458598 transitions. [2021-06-05 04:17:27,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 04:17:27,598 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:27,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:27,900 INFO L225 Difference]: With dead ends: 152571 [2021-06-05 04:17:27,900 INFO L226 Difference]: Without dead ends: 152571 [2021-06-05 04:17:27,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:17:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152571 states. [2021-06-05 04:17:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152571 to 142516. [2021-06-05 04:17:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142516 states, 142515 states have (on average 3.0138722239764237) internal successors, (429522), 142515 states have internal predecessors, (429522), 0 states have call successors, (0), 0 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 04:17:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142516 states to 142516 states and 429522 transitions. [2021-06-05 04:17:31,273 INFO L78 Accepts]: Start accepts. Automaton has 142516 states and 429522 transitions. Word has length 25 [2021-06-05 04:17:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:31,273 INFO L482 AbstractCegarLoop]: Abstraction has 142516 states and 429522 transitions. [2021-06-05 04:17:31,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 142516 states and 429522 transitions. [2021-06-05 04:17:31,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:31,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:31,358 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:31,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20286 [2021-06-05 04:17:31,573 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:31,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:31,573 INFO L82 PathProgramCache]: Analyzing trace with hash -456079636, now seen corresponding path program 485 times [2021-06-05 04:17:31,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:31,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103165727] [2021-06-05 04:17:31,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103165727] [2021-06-05 04:17:31,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103165727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240290467] [2021-06-05 04:17:31,633 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 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:31,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-05 04:17:31,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:31,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:31,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:31,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240290467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:31,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:31,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203826103] [2021-06-05 04:17:31,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:31,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:31,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:31,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:31,706 INFO L87 Difference]: Start difference. First operand 142516 states and 429522 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:32,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:32,355 INFO L93 Difference]: Finished difference Result 161991 states and 486545 transitions. [2021-06-05 04:17:32,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 04:17:32,355 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:32,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:32,681 INFO L225 Difference]: With dead ends: 161991 [2021-06-05 04:17:32,681 INFO L226 Difference]: Without dead ends: 161991 [2021-06-05 04:17:32,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=282, Invalid=474, Unknown=0, NotChecked=0, Total=756 [2021-06-05 04:17:32,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161991 states. [2021-06-05 04:17:35,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161991 to 134941. [2021-06-05 04:17:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134941 states, 134940 states have (on average 3.012390692159478) internal successors, (406492), 134940 states have internal predecessors, (406492), 0 states have call successors, (0), 0 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 04:17:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134941 states to 134941 states and 406492 transitions. [2021-06-05 04:17:36,077 INFO L78 Accepts]: Start accepts. Automaton has 134941 states and 406492 transitions. Word has length 25 [2021-06-05 04:17:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:36,077 INFO L482 AbstractCegarLoop]: Abstraction has 134941 states and 406492 transitions. [2021-06-05 04:17:36,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 134941 states and 406492 transitions. [2021-06-05 04:17:36,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:36,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:36,143 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:36,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20287,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:36,343 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:36,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1778027858, now seen corresponding path program 486 times [2021-06-05 04:17:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:36,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989125858] [2021-06-05 04:17:36,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:36,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:36,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989125858] [2021-06-05 04:17:36,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989125858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162947910] [2021-06-05 04:17:36,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:36,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-05 04:17:36,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:36,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:36,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162947910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:36,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:36,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-05 04:17:36,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399854621] [2021-06-05 04:17:36,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:17:36,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:17:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:17:36,475 INFO L87 Difference]: Start difference. First operand 134941 states and 406492 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:37,220 INFO L93 Difference]: Finished difference Result 190874 states and 573960 transitions. [2021-06-05 04:17:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:37,636 INFO L225 Difference]: With dead ends: 190874 [2021-06-05 04:17:37,636 INFO L226 Difference]: Without dead ends: 190874 [2021-06-05 04:17:37,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=335, Invalid=595, Unknown=0, NotChecked=0, Total=930 [2021-06-05 04:17:37,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190874 states. [2021-06-05 04:17:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190874 to 166083. [2021-06-05 04:17:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166083 states, 166082 states have (on average 3.0187678375742104) internal successors, (501363), 166082 states have internal predecessors, (501363), 0 states have call successors, (0), 0 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 04:17:41,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166083 states to 166083 states and 501363 transitions. [2021-06-05 04:17:41,369 INFO L78 Accepts]: Start accepts. Automaton has 166083 states and 501363 transitions. Word has length 25 [2021-06-05 04:17:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:41,370 INFO L482 AbstractCegarLoop]: Abstraction has 166083 states and 501363 transitions. [2021-06-05 04:17:41,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 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 04:17:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 166083 states and 501363 transitions. [2021-06-05 04:17:41,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:41,442 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:41,442 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:41,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20288 [2021-06-05 04:17:41,643 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:41,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:41,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1979083860, now seen corresponding path program 487 times [2021-06-05 04:17:41,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:41,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61213099] [2021-06-05 04:17:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61213099] [2021-06-05 04:17:41,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61213099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628439246] [2021-06-05 04:17:41,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:41,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:41,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:41,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628439246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:41,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:41,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:17:41,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397930163] [2021-06-05 04:17:41,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:41,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:41,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:41,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:41,776 INFO L87 Difference]: Start difference. First operand 166083 states and 501363 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:43,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:43,031 INFO L93 Difference]: Finished difference Result 187568 states and 564047 transitions. [2021-06-05 04:17:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 04:17:43,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:43,437 INFO L225 Difference]: With dead ends: 187568 [2021-06-05 04:17:43,437 INFO L226 Difference]: Without dead ends: 187568 [2021-06-05 04:17:43,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 04:17:43,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187568 states. [2021-06-05 04:17:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187568 to 137430. [2021-06-05 04:17:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137430 states, 137429 states have (on average 3.0178492166864346) internal successors, (414740), 137429 states have internal predecessors, (414740), 0 states have call successors, (0), 0 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 04:17:47,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137430 states to 137430 states and 414740 transitions. [2021-06-05 04:17:47,359 INFO L78 Accepts]: Start accepts. Automaton has 137430 states and 414740 transitions. Word has length 25 [2021-06-05 04:17:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:47,359 INFO L482 AbstractCegarLoop]: Abstraction has 137430 states and 414740 transitions. [2021-06-05 04:17:47,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 137430 states and 414740 transitions. [2021-06-05 04:17:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:47,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:47,434 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:47,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20289 [2021-06-05 04:17:47,645 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:47,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:47,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1809537170, now seen corresponding path program 488 times [2021-06-05 04:17:47,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264919205] [2021-06-05 04:17:47,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:47,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264919205] [2021-06-05 04:17:47,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264919205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:47,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776080011] [2021-06-05 04:17:47,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:47,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:17:47,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:47,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 04:17:47,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776080011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:47,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:47,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-05 04:17:47,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966249495] [2021-06-05 04:17:47,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 04:17:47,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:47,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 04:17:47,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:17:47,785 INFO L87 Difference]: Start difference. First operand 137430 states and 414740 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:48,626 INFO L93 Difference]: Finished difference Result 196837 states and 592516 transitions. [2021-06-05 04:17:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 04:17:48,626 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:48,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:49,123 INFO L225 Difference]: With dead ends: 196837 [2021-06-05 04:17:49,123 INFO L226 Difference]: Without dead ends: 196837 [2021-06-05 04:17:49,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=346, Invalid=646, Unknown=0, NotChecked=0, Total=992 [2021-06-05 04:17:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196837 states. [2021-06-05 04:17:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196837 to 188376. [2021-06-05 04:17:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188376 states, 188375 states have (on average 3.0179960185799604) internal successors, (568515), 188375 states have internal predecessors, (568515), 0 states have call successors, (0), 0 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 04:17:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188376 states to 188376 states and 568515 transitions. [2021-06-05 04:17:53,673 INFO L78 Accepts]: Start accepts. Automaton has 188376 states and 568515 transitions. Word has length 25 [2021-06-05 04:17:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:17:53,673 INFO L482 AbstractCegarLoop]: Abstraction has 188376 states and 568515 transitions. [2021-06-05 04:17:53,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 188376 states and 568515 transitions. [2021-06-05 04:17:53,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 04:17:53,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:17:53,827 INFO L521 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:17:54,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20290 [2021-06-05 04:17:54,051 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:17:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:17:54,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1002295188, now seen corresponding path program 489 times [2021-06-05 04:17:54,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:17:54,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765839978] [2021-06-05 04:17:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:17:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:17:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:54,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:17:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765839978] [2021-06-05 04:17:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765839978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434889158] [2021-06-05 04:17:54,130 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 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:54,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 04:17:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:17:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 04:17:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:17:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:17:54,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434889158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:17:54,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:17:54,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-05 04:17:54,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828798446] [2021-06-05 04:17:54,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 04:17:54,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:17:54,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 04:17:54,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:17:54,198 INFO L87 Difference]: Start difference. First operand 188376 states and 568515 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:17:54,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:17:54,983 INFO L93 Difference]: Finished difference Result 194807 states and 586573 transitions. [2021-06-05 04:17:54,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 04:17:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 04:17:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:17:55,423 INFO L225 Difference]: With dead ends: 194807 [2021-06-05 04:17:55,423 INFO L226 Difference]: Without dead ends: 194807 [2021-06-05 04:17:55,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2021-06-05 04:17:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194807 states. Received shutdown request... [2021-06-05 04:17:56,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20291,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:17:56,512 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 04:17:56,514 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 04:17:56,515 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 04:17:56,515 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 04:17:56 BasicIcfg [2021-06-05 04:17:56,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 04:17:56,516 INFO L168 Benchmark]: Toolchain (without parser) took 871463.74 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.2 MB in the beginning and 13.7 GB in the end (delta: -13.3 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 336.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 356.5 MB. Free memory was 335.1 MB in the beginning and 333.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 INFO L168 Benchmark]: Boogie Preprocessor took 11.95 ms. Allocated memory is still 356.5 MB. Free memory was 333.7 MB in the beginning and 332.7 MB in the end (delta: 931.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 INFO L168 Benchmark]: RCFGBuilder took 217.71 ms. Allocated memory is still 356.5 MB. Free memory was 332.7 MB in the beginning and 318.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 INFO L168 Benchmark]: TraceAbstraction took 871212.41 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.3 MB in the beginning and 13.7 GB in the end (delta: -13.3 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. [2021-06-05 04:17:56,516 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 0.12 ms. Allocated memory is still 356.5 MB. Free memory was 336.3 MB in the beginning and 336.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 356.5 MB. Free memory was 335.1 MB in the beginning and 333.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.95 ms. Allocated memory is still 356.5 MB. Free memory was 333.7 MB in the beginning and 332.7 MB in the end (delta: 931.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 217.71 ms. Allocated memory is still 356.5 MB. Free memory was 332.7 MB in the beginning and 318.8 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 871212.41 ms. Allocated memory was 356.5 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 318.3 MB in the beginning and 13.7 GB in the end (delta: -13.3 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 48]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 871128.6ms, OverallIterations: 493, TraceHistogramMax: 11, EmptinessCheckTime: 7085.1ms, AutomataDifference: 127860.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10132 SDtfs, 42335 SDslu, 65175 SDs, 0 SdLazy, 76067 SolverSat, 13839 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27807.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21270 GetRequests, 10089 SyntacticMatches, 240 SemanticMatches, 10941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70925 ImplicationChecksByTransitivity, 61399.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269074occurred in iteration=456, InterpolantAutomatonStates: 9719, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 187089.0ms AutomataMinimizationTime, 493 MinimizatonAttempts, 1574253 StatesRemovedByMinimization, 488 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1424.8ms SsaConstructionTime, 4892.5ms SatisfiabilityAnalysisTime, 434660.0ms InterpolantComputationTime, 20719 NumberOfCodeBlocks, 20713 NumberOfCodeBlocksAsserted, 2178 NumberOfCheckSat, 19736 ConstructedInterpolants, 0 QuantifiedInterpolants, 89908 SizeOfPredicates, 274 NumberOfNonLiveVariables, 42385 ConjunctsInSsa, 7397 ConjunctsInUnsatCore, 983 InterpolantComputations, 3 PerfectInterpolantSequences, 19273/48650 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