/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/invert_string-3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:13:56,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:13:56,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:13:56,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:13:56,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:13:56,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:13:56,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:13:56,599 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:13:56,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:13:56,606 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:13:56,608 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:13:56,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:13:56,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:13:56,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:13:56,614 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:13:56,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:13:56,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:13:56,617 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:13:56,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:13:56,623 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:13:56,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:13:56,631 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:13:56,632 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:13:56,632 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:13:56,635 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:13:56,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:13:56,647 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:13:56,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:13:56,649 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:13:56,677 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:13:56,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:13:56,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:13:56,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:13:56,681 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:13:56,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:13:56,682 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:13:56,682 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:13:56,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:13:56,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:13:56,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:13:56,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:13:56,684 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:13:56,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:13:56,685 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:13:56,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:13:56,685 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:13:56,685 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:13:56,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:13:56,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:13:56,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:13:56,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:13:56,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:13:56,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:13:56,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:13:56,970 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:13:56,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:13:56,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:13:56,996 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:13:56,996 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:13:56,997 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/invert_string-3.c [2019-11-23 22:13:57,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97438c441/61729a71b3fa413ca547738c42690158/FLAGdd98733dd [2019-11-23 22:13:57,533 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:13:57,533 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/invert_string-3.c [2019-11-23 22:13:57,539 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97438c441/61729a71b3fa413ca547738c42690158/FLAGdd98733dd [2019-11-23 22:13:57,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97438c441/61729a71b3fa413ca547738c42690158 [2019-11-23 22:13:57,977 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:13:57,979 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:13:57,980 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:57,980 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:13:57,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:13:57,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:57" (1/1) ... [2019-11-23 22:13:57,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705ef929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:57, skipping insertion in model container [2019-11-23 22:13:57,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:57" (1/1) ... [2019-11-23 22:13:57,997 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:13:58,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:13:58,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:58,311 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:13:58,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:58,461 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:13:58,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58 WrapperNode [2019-11-23 22:13:58,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:58,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:58,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:13:58,463 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:13:58,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:58,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:13:58,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:13:58,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:13:58,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,530 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,531 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,536 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (1/1) ... [2019-11-23 22:13:58,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:13:58,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:13:58,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:13:58,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:13:58,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (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 [2019-11-23 22:13:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:13:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:13:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:13:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:13:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:13:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:13:58,837 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:13:58,837 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 22:13:58,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:58 BoogieIcfgContainer [2019-11-23 22:13:58,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:13:58,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:13:58,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:13:58,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:13:58,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:13:57" (1/3) ... [2019-11-23 22:13:58,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e59804d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:58, skipping insertion in model container [2019-11-23 22:13:58,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:58" (2/3) ... [2019-11-23 22:13:58,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e59804d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:58, skipping insertion in model container [2019-11-23 22:13:58,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:58" (3/3) ... [2019-11-23 22:13:58,846 INFO L109 eAbstractionObserver]: Analyzing ICFG invert_string-3.c [2019-11-23 22:13:58,857 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:13:58,864 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:13:58,880 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:13:58,914 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:13:58,914 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:13:58,914 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:13:58,915 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:13:58,915 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:13:58,915 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:13:58,915 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:13:58,915 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:13:58,934 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-11-23 22:13:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:13:58,942 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:58,943 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:58,943 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:58,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:58,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2019-11-23 22:13:58,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:58,967 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825383243] [2019-11-23 22:13:58,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:59,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825383243] [2019-11-23 22:13:59,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:59,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 22:13:59,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620523082] [2019-11-23 22:13:59,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:59,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:59,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:59,332 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-11-23 22:13:59,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:59,425 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2019-11-23 22:13:59,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:59,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-23 22:13:59,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:59,436 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:13:59,436 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:13:59,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:59,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:13:59,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:13:59,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:13:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-23 22:13:59,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2019-11-23 22:13:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:59,483 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-23 22:13:59,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-11-23 22:13:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:13:59,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:59,485 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:59,485 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:59,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:59,486 INFO L82 PathProgramCache]: Analyzing trace with hash 867342291, now seen corresponding path program 1 times [2019-11-23 22:13:59,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:59,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113986929] [2019-11-23 22:13:59,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:59,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113986929] [2019-11-23 22:13:59,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:59,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:13:59,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186930270] [2019-11-23 22:13:59,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:13:59,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:59,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:13:59,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:13:59,626 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2019-11-23 22:13:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:59,674 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-11-23 22:13:59,675 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:13:59,675 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-11-23 22:13:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:59,676 INFO L225 Difference]: With dead ends: 28 [2019-11-23 22:13:59,676 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:13:59,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:13:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:13:59,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-11-23 22:13:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 22:13:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 22:13:59,689 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 22:13:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:59,691 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 22:13:59,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:13:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 22:13:59,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:13:59,692 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:59,692 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:59,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:59,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2019-11-23 22:13:59,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:59,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916858884] [2019-11-23 22:13:59,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:59,886 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916858884] [2019-11-23 22:13:59,887 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173578238] [2019-11-23 22:13:59,887 INFO L94 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 [2019-11-23 22:13:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:59,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-23 22:13:59,972 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:00,041 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:00,042 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,050 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:00,051 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,051 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 22:14:00,100 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2019-11-23 22:14:00,101 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,168 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:00,182 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2019-11-23 22:14:00,182 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,234 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:00,235 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:00,235 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:95, output treesize:87 [2019-11-23 22:14:00,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:00,332 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:00,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,380 INFO L567 ElimStorePlain]: treesize reduction 3, result has 94.8 percent of original size [2019-11-23 22:14:00,387 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 22:14:00,390 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 20 [2019-11-23 22:14:00,392 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,416 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:00,416 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:00,417 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:120, output treesize:41 [2019-11-23 22:14:00,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:00,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:00,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:00,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2019-11-23 22:14:00,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717936402] [2019-11-23 22:14:00,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:14:00,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:00,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:14:00,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:14:00,698 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 12 states. [2019-11-23 22:14:01,192 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2019-11-23 22:14:01,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:01,415 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-23 22:14:01,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:14:01,415 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2019-11-23 22:14:01,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:01,416 INFO L225 Difference]: With dead ends: 44 [2019-11-23 22:14:01,416 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:14:01,417 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:14:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:14:01,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2019-11-23 22:14:01,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:14:01,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-11-23 22:14:01,424 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 13 [2019-11-23 22:14:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:01,425 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-11-23 22:14:01,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:14:01,425 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-11-23 22:14:01,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:14:01,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:01,426 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:01,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:01,641 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash -799235507, now seen corresponding path program 2 times [2019-11-23 22:14:01,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:01,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238005432] [2019-11-23 22:14:01,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:14:01,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238005432] [2019-11-23 22:14:01,918 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006316468] [2019-11-23 22:14:01,919 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:01,964 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:01,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:01,966 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-23 22:14:01,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:01,975 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:01,976 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:01,980 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:01,981 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:01,981 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2019-11-23 22:14:02,124 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:02,125 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:02,141 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2019-11-23 22:14:02,142 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:02,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:02,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:02,162 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:99, output treesize:45 [2019-11-23 22:14:02,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:02,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:14:02,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:02,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2019-11-23 22:14:02,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28399872] [2019-11-23 22:14:02,426 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 22:14:02,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:02,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 22:14:02,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:14:02,427 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 16 states. [2019-11-23 22:14:03,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:03,055 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-11-23 22:14:03,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 22:14:03,056 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 17 [2019-11-23 22:14:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:03,057 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:14:03,057 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:14:03,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2019-11-23 22:14:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:14:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2019-11-23 22:14:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:14:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-11-23 22:14:03,064 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2019-11-23 22:14:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:03,065 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-11-23 22:14:03,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 22:14:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-11-23 22:14:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:14:03,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:03,066 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:03,269 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:03,270 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:03,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:03,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1915760309, now seen corresponding path program 3 times [2019-11-23 22:14:03,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:03,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060911824] [2019-11-23 22:14:03,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:14:03,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060911824] [2019-11-23 22:14:03,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500590517] [2019-11-23 22:14:03,492 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:03,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 22:14:03,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:03,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 22:14:03,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:03,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:03,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-23 22:14:03,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028773646] [2019-11-23 22:14:03,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:14:03,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:03,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:14:03,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:14:03,625 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 11 states. [2019-11-23 22:14:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:03,924 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2019-11-23 22:14:03,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:14:03,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-23 22:14:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:03,926 INFO L225 Difference]: With dead ends: 46 [2019-11-23 22:14:03,926 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:14:03,927 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:14:03,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:14:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-23 22:14:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:14:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 22:14:03,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-11-23 22:14:03,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:03,936 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 22:14:03,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:14:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 22:14:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 22:14:03,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:03,937 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:04,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:04,140 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:04,141 INFO L82 PathProgramCache]: Analyzing trace with hash -939099897, now seen corresponding path program 4 times [2019-11-23 22:14:04,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:04,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455497208] [2019-11-23 22:14:04,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:04,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455497208] [2019-11-23 22:14:04,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37413863] [2019-11-23 22:14:04,390 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:04,449 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:14:04,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:04,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 41 conjunts are in the unsatisfiable core [2019-11-23 22:14:04,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:04,467 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:04,467 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:04,473 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:04,473 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:04,473 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-23 22:14:04,812 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:04,813 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:04,819 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2019-11-23 22:14:04,820 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:04,833 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:04,834 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:04,834 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:93, output treesize:42 [2019-11-23 22:14:04,999 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:05,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:05,202 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:05,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:05,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 22 [2019-11-23 22:14:05,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532637000] [2019-11-23 22:14:05,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:14:05,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:14:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:14:05,206 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 22 states. [2019-11-23 22:14:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:06,929 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2019-11-23 22:14:06,930 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 22:14:06,930 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2019-11-23 22:14:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:06,931 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:14:06,931 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 22:14:06,932 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=231, Invalid=1175, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 22:14:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 22:14:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 28. [2019-11-23 22:14:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 22:14:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-23 22:14:06,946 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2019-11-23 22:14:06,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:06,946 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-23 22:14:06,946 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:14:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-23 22:14:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 22:14:06,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:06,948 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:07,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:07,150 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1113514373, now seen corresponding path program 5 times [2019-11-23 22:14:07,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:07,151 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600714849] [2019-11-23 22:14:07,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:07,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:14:07,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600714849] [2019-11-23 22:14:07,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032027953] [2019-11-23 22:14:07,268 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:07,321 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:14:07,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:07,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-23 22:14:07,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:07,330 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:07,330 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:07,333 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:07,334 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:07,334 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2019-11-23 22:14:07,715 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:07,715 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:07,722 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2019-11-23 22:14:07,723 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:07,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:07,741 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:07,742 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:93, output treesize:42 [2019-11-23 22:14:07,911 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:08,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 22:14:08,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:08,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 17] total 22 [2019-11-23 22:14:08,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759148929] [2019-11-23 22:14:08,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:14:08,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:08,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:14:08,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:14:08,040 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 22 states. [2019-11-23 22:14:09,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:09,093 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2019-11-23 22:14:09,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:14:09,094 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2019-11-23 22:14:09,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:09,095 INFO L225 Difference]: With dead ends: 64 [2019-11-23 22:14:09,095 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:14:09,097 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:14:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:14:09,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2019-11-23 22:14:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:14:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2019-11-23 22:14:09,103 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 25 [2019-11-23 22:14:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:09,104 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2019-11-23 22:14:09,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:14:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2019-11-23 22:14:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 22:14:09,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:09,105 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:09,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:09,309 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:09,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:09,309 INFO L82 PathProgramCache]: Analyzing trace with hash -916145087, now seen corresponding path program 6 times [2019-11-23 22:14:09,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:09,310 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612248168] [2019-11-23 22:14:09,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:14:09,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612248168] [2019-11-23 22:14:09,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:14:09,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 22:14:09,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592013506] [2019-11-23 22:14:09,530 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:14:09,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:09,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:14:09,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:14:09,532 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 9 states. [2019-11-23 22:14:09,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:09,799 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2019-11-23 22:14:09,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:14:09,800 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2019-11-23 22:14:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:09,801 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:14:09,801 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 22:14:09,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:14:09,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 22:14:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 32. [2019-11-23 22:14:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 22:14:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-23 22:14:09,811 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2019-11-23 22:14:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:09,811 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-23 22:14:09,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:14:09,811 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-23 22:14:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-23 22:14:09,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:09,812 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:09,813 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -462207975, now seen corresponding path program 1 times [2019-11-23 22:14:09,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:09,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657571338] [2019-11-23 22:14:09,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 22:14:09,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657571338] [2019-11-23 22:14:09,925 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657414810] [2019-11-23 22:14:09,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:09,973 WARN L253 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 61 conjunts are in the unsatisfiable core [2019-11-23 22:14:09,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:09,982 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:09,983 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,990 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:09,991 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:09,991 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 22:14:10,360 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2019-11-23 22:14:10,361 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:10,366 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 48 [2019-11-23 22:14:10,367 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:10,408 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:10,408 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:10,408 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:99, output treesize:91 [2019-11-23 22:14:10,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:10,578 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:10,579 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:10,586 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 73 [2019-11-23 22:14:10,587 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:10,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:10,594 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:10,619 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:10,620 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:10,620 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:137, output treesize:64 [2019-11-23 22:14:10,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:11,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:11,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:11,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:11,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 23] total 29 [2019-11-23 22:14:11,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566747506] [2019-11-23 22:14:11,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:14:11,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:11,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:14:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:14:11,360 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 29 states. [2019-11-23 22:14:12,765 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2019-11-23 22:14:12,959 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 22:14:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:13,638 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2019-11-23 22:14:13,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 22:14:13,639 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 31 [2019-11-23 22:14:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:13,640 INFO L225 Difference]: With dead ends: 68 [2019-11-23 22:14:13,640 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:14:13,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=225, Invalid=1667, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 22:14:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:14:13,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2019-11-23 22:14:13,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 22:14:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-23 22:14:13,652 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2019-11-23 22:14:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:13,653 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-23 22:14:13,653 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:14:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-23 22:14:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:14:13,654 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:13,654 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:13,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:13,857 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash 2026706477, now seen corresponding path program 2 times [2019-11-23 22:14:13,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:13,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278264170] [2019-11-23 22:14:13,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:14,458 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2019-11-23 22:14:14,615 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2019-11-23 22:14:14,756 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2019-11-23 22:14:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 22:14:15,416 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278264170] [2019-11-23 22:14:15,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764903903] [2019-11-23 22:14:15,417 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 22:14:15,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:14:15,470 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:15,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 65 conjunts are in the unsatisfiable core [2019-11-23 22:14:15,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:15,479 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:15,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:15,485 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:15,485 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:15,486 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 22:14:15,734 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 55 [2019-11-23 22:14:15,735 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:15,739 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 56 [2019-11-23 22:14:15,740 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:15,783 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:15,783 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:15,783 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:114, output treesize:106 [2019-11-23 22:14:15,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:15,981 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:15,982 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:15,990 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 82 [2019-11-23 22:14:15,991 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:15,996 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:15,997 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,000 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 83 [2019-11-23 22:14:16,000 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:16,059 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:16,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-23 22:14:16,061 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:156, output treesize:148 [2019-11-23 22:14:16,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:16,346 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:16,347 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:16,369 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,380 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,381 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,382 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:16,384 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 108 [2019-11-23 22:14:16,385 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:16,413 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:16,414 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:16,415 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:194, output treesize:93 [2019-11-23 22:14:16,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:17,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:17,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:14:17,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:17,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 41 [2019-11-23 22:14:17,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311453873] [2019-11-23 22:14:17,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:14:17,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:17,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:14:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:14:17,720 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 41 states. [2019-11-23 22:14:18,245 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 87 [2019-11-23 22:14:18,524 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2019-11-23 22:14:18,815 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2019-11-23 22:14:19,021 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2019-11-23 22:14:19,277 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2019-11-23 22:14:19,654 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2019-11-23 22:14:19,849 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2019-11-23 22:14:20,108 WARN L192 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 60 [2019-11-23 22:14:20,374 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2019-11-23 22:14:20,599 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 67 [2019-11-23 22:14:20,840 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 64 [2019-11-23 22:14:21,143 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2019-11-23 22:14:21,363 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2019-11-23 22:14:21,554 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 63 [2019-11-23 22:14:21,984 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 63 [2019-11-23 22:14:22,196 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2019-11-23 22:14:22,570 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2019-11-23 22:14:22,800 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 57 [2019-11-23 22:14:22,978 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 60 [2019-11-23 22:14:23,800 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 79 [2019-11-23 22:14:24,071 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 77 [2019-11-23 22:14:24,320 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 80 [2019-11-23 22:14:24,693 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 71 [2019-11-23 22:14:25,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:25,037 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2019-11-23 22:14:25,037 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 22:14:25,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 37 [2019-11-23 22:14:25,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:25,039 INFO L225 Difference]: With dead ends: 52 [2019-11-23 22:14:25,039 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 22:14:25,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=790, Invalid=4612, Unknown=0, NotChecked=0, Total=5402 [2019-11-23 22:14:25,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 22:14:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2019-11-23 22:14:25,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:14:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-23 22:14:25,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2019-11-23 22:14:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:25,054 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-23 22:14:25,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:14:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-23 22:14:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 22:14:25,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:25,055 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:25,258 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:25,259 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:25,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1950301565, now seen corresponding path program 3 times [2019-11-23 22:14:25,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:25,260 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128595104] [2019-11-23 22:14:25,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:25,891 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2019-11-23 22:14:26,271 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-23 22:14:27,229 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:27,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128595104] [2019-11-23 22:14:27,230 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345105439] [2019-11-23 22:14:27,230 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-23 22:14:27,683 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 22:14:27,683 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:27,685 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:14:27,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:27,693 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:27,694 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:27,703 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:27,703 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:27,703 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2019-11-23 22:14:28,089 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2019-11-23 22:14:28,089 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,103 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:28,104 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,104 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2019-11-23 22:14:28,233 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,234 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,236 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 45 [2019-11-23 22:14:28,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,254 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:28,255 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,255 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:65, output treesize:61 [2019-11-23 22:14:28,417 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,419 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,420 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,421 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,422 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,425 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 67 [2019-11-23 22:14:28,428 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:28,452 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:28,453 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:86, output treesize:82 [2019-11-23 22:14:28,675 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,677 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,678 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,679 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,680 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,681 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,682 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,684 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,685 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,686 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,687 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,688 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:28,690 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 88 [2019-11-23 22:14:28,691 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:28,723 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:28,724 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:28,724 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:109, output treesize:105 [2019-11-23 22:14:29,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:29,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:29,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:29,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2019-11-23 22:14:29,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789974136] [2019-11-23 22:14:29,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:14:29,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:29,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:14:29,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2154, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:14:29,830 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 51 states. [2019-11-23 22:14:30,201 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2019-11-23 22:14:30,395 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2019-11-23 22:14:30,579 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2019-11-23 22:14:32,331 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 67 [2019-11-23 22:14:32,538 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2019-11-23 22:14:34,054 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 86 [2019-11-23 22:14:34,317 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 84 [2019-11-23 22:14:34,592 WARN L192 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 87 [2019-11-23 22:14:34,822 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 82 [2019-11-23 22:14:35,014 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2019-11-23 22:14:35,232 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2019-11-23 22:14:35,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:35,757 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2019-11-23 22:14:35,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 22:14:35,757 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 41 [2019-11-23 22:14:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:35,758 INFO L225 Difference]: With dead ends: 65 [2019-11-23 22:14:35,758 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 22:14:35,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2168 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1266, Invalid=6216, Unknown=0, NotChecked=0, Total=7482 [2019-11-23 22:14:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 22:14:35,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2019-11-23 22:14:35,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 22:14:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-11-23 22:14:35,774 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2019-11-23 22:14:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:35,774 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-11-23 22:14:35,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:14:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-11-23 22:14:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 22:14:35,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:35,776 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:35,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:35,980 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:35,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1773818841, now seen corresponding path program 4 times [2019-11-23 22:14:35,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:35,981 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761003002] [2019-11-23 22:14:35,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:36,444 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2019-11-23 22:14:36,582 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2019-11-23 22:14:36,712 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2019-11-23 22:14:37,044 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-23 22:14:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:14:38,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761003002] [2019-11-23 22:14:38,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667045407] [2019-11-23 22:14:38,084 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-23 22:14:38,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:14:38,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:14:38,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 78 conjunts are in the unsatisfiable core [2019-11-23 22:14:38,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:14:38,144 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 22:14:38,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,151 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:38,151 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,151 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-23 22:14:38,384 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 44 [2019-11-23 22:14:38,385 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,394 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 46 [2019-11-23 22:14:38,395 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:38,437 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:38,437 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:93, output treesize:85 [2019-11-23 22:14:38,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:38,634 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,636 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,641 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 71 [2019-11-23 22:14:38,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,654 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,655 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,657 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 71 [2019-11-23 22:14:38,658 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:38,709 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:38,709 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:38,710 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:133, output treesize:125 [2019-11-23 22:14:38,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:38,958 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,960 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,961 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,968 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,969 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,970 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:38,971 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 90 [2019-11-23 22:14:38,972 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:39,034 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:39,040 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,042 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,043 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,044 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,045 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,046 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,050 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 90 [2019-11-23 22:14:39,050 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:39,109 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:39,110 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:14:39,110 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:159, output treesize:151 [2019-11-23 22:14:39,360 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:39,375 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,376 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,378 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,379 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,380 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,381 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,383 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,384 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,386 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,387 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,420 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 117 [2019-11-23 22:14:39,421 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:39,443 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,444 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,445 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,446 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,447 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,448 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,449 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,450 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,451 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,452 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,453 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,454 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:39,455 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 13 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 117 [2019-11-23 22:14:39,456 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:39,549 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:39,551 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-23 22:14:39,551 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:201, output treesize:193 [2019-11-23 22:14:39,987 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:40,000 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-23 22:14:40,000 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:40,004 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,009 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,010 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,011 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,013 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,014 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,014 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,015 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,017 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,018 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,019 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,020 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,022 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,023 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,024 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,025 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,026 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,027 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:14:40,030 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 21 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 142 [2019-11-23 22:14:40,032 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:14:40,070 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:14:40,071 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 22:14:40,071 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:239, output treesize:115 [2019-11-23 22:14:40,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:41,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:42,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:14:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:14:42,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:14:42,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2019-11-23 22:14:42,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032251859] [2019-11-23 22:14:42,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-23 22:14:42,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:14:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-23 22:14:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2877, Unknown=0, NotChecked=0, Total=3306 [2019-11-23 22:14:42,381 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 58 states. [2019-11-23 22:14:43,199 WARN L192 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2019-11-23 22:14:43,719 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2019-11-23 22:14:44,239 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-11-23 22:14:44,683 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-11-23 22:14:45,577 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2019-11-23 22:14:45,829 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 63 [2019-11-23 22:14:46,041 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 72 [2019-11-23 22:14:47,366 WARN L192 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2019-11-23 22:14:47,735 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2019-11-23 22:14:48,580 WARN L192 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2019-11-23 22:14:48,927 WARN L192 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 93 [2019-11-23 22:14:49,237 WARN L192 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 96 [2019-11-23 22:14:49,509 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 85 [2019-11-23 22:14:49,769 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 89 [2019-11-23 22:14:50,029 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 86 [2019-11-23 22:14:50,232 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2019-11-23 22:14:50,468 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85 [2019-11-23 22:14:50,698 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2019-11-23 22:14:51,080 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2019-11-23 22:14:51,320 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 78 [2019-11-23 22:14:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:14:51,342 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2019-11-23 22:14:51,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:14:51,342 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 45 [2019-11-23 22:14:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:14:51,346 INFO L225 Difference]: With dead ends: 83 [2019-11-23 22:14:51,346 INFO L226 Difference]: Without dead ends: 81 [2019-11-23 22:14:51,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2832 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1385, Invalid=8317, Unknown=0, NotChecked=0, Total=9702 [2019-11-23 22:14:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-23 22:14:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 50. [2019-11-23 22:14:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 22:14:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-23 22:14:51,365 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 45 [2019-11-23 22:14:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:14:51,365 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-23 22:14:51,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-23 22:14:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-23 22:14:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 22:14:51,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:14:51,366 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:14:51,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:14:51,570 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:14:51,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:14:51,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1556133329, now seen corresponding path program 5 times [2019-11-23 22:14:51,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:14:51,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113227488] [2019-11-23 22:14:51,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:14:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:14:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 22:14:51,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113227488] [2019-11-23 22:14:51,857 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362930954] [2019-11-23 22:14:51,857 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true