/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/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:13:20,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:13:20,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:13:20,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 22:13:20,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:13:20,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:13:20,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:13:20,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:13:20,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:13:20,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:13:20,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:13:20,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:13:20,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:13:20,941 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:13:20,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:13:20,943 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:13:20,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 22:13:20,954 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 22:13:20,967 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:13:20,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:13:20,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:13:20,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:13:20,969 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:13:20,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:13:20,970 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:13:20,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:13:20,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:13:20,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:13:20,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:13:20,971 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:13:20,971 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:13:20,971 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:13:20,971 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:13:20,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:13:20,972 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:13:20,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:13:20,972 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:13:20,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:13:20,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:13:20,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:13:20,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:13:20,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:13:20,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:13:20,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:13:20,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:13:20,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:13:20,974 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:13:20,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:13:21,264 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:13:21,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:13:21,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:13:21,281 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:13:21,282 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:13:21,283 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2019-11-23 22:13:21,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc258aa3d/da5e7b8c95ca48beb657e5470597d765/FLAG7631c4bd8 [2019-11-23 22:13:21,801 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:13:21,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_05.i [2019-11-23 22:13:21,808 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc258aa3d/da5e7b8c95ca48beb657e5470597d765/FLAG7631c4bd8 [2019-11-23 22:13:22,229 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc258aa3d/da5e7b8c95ca48beb657e5470597d765 [2019-11-23 22:13:22,239 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:13:22,241 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:13:22,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:22,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:13:22,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:13:22,248 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@447643de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22, skipping insertion in model container [2019-11-23 22:13:22,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:13:22,275 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:13:22,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:22,475 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:13:22,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:13:22,607 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:13:22,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22 WrapperNode [2019-11-23 22:13:22,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:13:22,608 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:22,608 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:13:22,608 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:13:22,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,648 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:13:22,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:13:22,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:13:22,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:13:22,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,660 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (1/1) ... [2019-11-23 22:13:22,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:13:22,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:13:22,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:13:22,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:13:22,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (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 22:13:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 22:13:22,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:13:22,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:13:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 22:13:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-23 22:13:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 22:13:22,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 22:13:22,994 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:13:22,994 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 22:13:22,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:22 BoogieIcfgContainer [2019-11-23 22:13:22,997 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:13:23,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:13:23,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:13:23,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:13:23,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:13:22" (1/3) ... [2019-11-23 22:13:23,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726016c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:23, skipping insertion in model container [2019-11-23 22:13:23,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:13:22" (2/3) ... [2019-11-23 22:13:23,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726016c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:13:23, skipping insertion in model container [2019-11-23 22:13:23,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:13:22" (3/3) ... [2019-11-23 22:13:23,020 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2019-11-23 22:13:23,040 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:13:23,047 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:13:23,066 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:13:23,089 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:13:23,089 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:13:23,089 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:13:23,089 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:13:23,089 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:13:23,089 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:13:23,090 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:13:23,090 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:13:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-23 22:13:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 22:13:23,110 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,111 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2015864939, now seen corresponding path program 1 times [2019-11-23 22:13:23,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987934692] [2019-11-23 22:13:23,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,269 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 22:13:23,269 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987934692] [2019-11-23 22:13:23,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:23,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:13:23,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611934504] [2019-11-23 22:13:23,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:13:23,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:13:23,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:13:23,288 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2019-11-23 22:13:23,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:23,350 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2019-11-23 22:13:23,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:13:23,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 22:13:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:23,364 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:13:23,365 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 22:13:23,368 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 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 22:13:23,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 22:13:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-11-23 22:13:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:13:23,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-11-23 22:13:23,404 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2019-11-23 22:13:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:23,405 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-11-23 22:13:23,405 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:13:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-11-23 22:13:23,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 22:13:23,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,407 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,407 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1565230291, now seen corresponding path program 1 times [2019-11-23 22:13:23,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785748630] [2019-11-23 22:13:23,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:23,462 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785748630] [2019-11-23 22:13:23,463 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162882797] [2019-11-23 22:13:23,463 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 22:13:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:13:23,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:23,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-23 22:13:23,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076985790] [2019-11-23 22:13:23,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:23,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:23,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:23,542 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2019-11-23 22:13:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:23,582 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-11-23 22:13:23,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:23,582 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-23 22:13:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:23,583 INFO L225 Difference]: With dead ends: 36 [2019-11-23 22:13:23,584 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 22:13:23,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 22:13:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 22:13:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-11-23 22:13:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:13:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 22:13:23,590 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2019-11-23 22:13:23,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:23,590 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 22:13:23,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 22:13:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 22:13:23,592 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:23,592 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:23,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:23,796 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:23,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:23,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1566025071, now seen corresponding path program 2 times [2019-11-23 22:13:23,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:23,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802816991] [2019-11-23 22:13:23,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:23,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802816991] [2019-11-23 22:13:23,877 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093578211] [2019-11-23 22:13:23,877 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 22:13:23,946 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 22:13:23,947 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:23,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:13:23,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:23,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 22:13:23,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:23,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 22:13:23,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77960316] [2019-11-23 22:13:23,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 22:13:23,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 22:13:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:13:23,984 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-23 22:13:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,024 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-11-23 22:13:24,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 22:13:24,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 22:13:24,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,026 INFO L225 Difference]: With dead ends: 34 [2019-11-23 22:13:24,026 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:13:24,027 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:13:24,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:13:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2019-11-23 22:13:24,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 22:13:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 22:13:24,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2019-11-23 22:13:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,039 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 22:13:24,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 22:13:24,040 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 22:13:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 22:13:24,041 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,041 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,253 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2104278057, now seen corresponding path program 1 times [2019-11-23 22:13:24,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797128418] [2019-11-23 22:13:24,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:24,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797128418] [2019-11-23 22:13:24,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810751063] [2019-11-23 22:13:24,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:13:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:24,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:24,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-23 22:13:24,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157817823] [2019-11-23 22:13:24,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:13:24,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:24,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:13:24,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:24,387 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-11-23 22:13:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,419 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2019-11-23 22:13:24,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:13:24,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-23 22:13:24,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,421 INFO L225 Difference]: With dead ends: 40 [2019-11-23 22:13:24,421 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:13:24,422 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:13:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-11-23 22:13:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 22:13:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 22:13:24,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2019-11-23 22:13:24,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,438 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 22:13:24,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:13:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 22:13:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 22:13:24,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,440 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,643 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,644 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,644 INFO L82 PathProgramCache]: Analyzing trace with hash 536202087, now seen corresponding path program 2 times [2019-11-23 22:13:24,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,645 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383406653] [2019-11-23 22:13:24,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:24,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383406653] [2019-11-23 22:13:24,703 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820186213] [2019-11-23 22:13:24,703 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 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 22:13:24,756 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:24,756 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:24,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:24,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:24,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:24,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-23 22:13:24,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825047316] [2019-11-23 22:13:24,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 22:13:24,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:24,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 22:13:24,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:24,766 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2019-11-23 22:13:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,806 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-23 22:13:24,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 22:13:24,807 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 22:13:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,807 INFO L225 Difference]: With dead ends: 42 [2019-11-23 22:13:24,808 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:13:24,808 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 22:13:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:13:24,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-11-23 22:13:24,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 22:13:24,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 22:13:24,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-23 22:13:24,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,813 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 22:13:24,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 22:13:24,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 22:13:24,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 22:13:24,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,815 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:25,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,020 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:25,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:25,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1148715813, now seen corresponding path program 3 times [2019-11-23 22:13:25,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:25,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170584730] [2019-11-23 22:13:25,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 22:13:25,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170584730] [2019-11-23 22:13:25,091 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684190456] [2019-11-23 22:13:25,091 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 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 22:13:25,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 22:13:25,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:25,133 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 22:13:25,136 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:25,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 22:13:25,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:25,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2019-11-23 22:13:25,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040932099] [2019-11-23 22:13:25,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:13:25,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:13:25,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:13:25,181 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-11-23 22:13:25,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:25,231 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2019-11-23 22:13:25,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:13:25,234 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-11-23 22:13:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:25,234 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:13:25,234 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 22:13:25,235 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:13:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 22:13:25,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2019-11-23 22:13:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:13:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-23 22:13:25,240 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2019-11-23 22:13:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:25,240 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-23 22:13:25,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:13:25,241 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-23 22:13:25,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:13:25,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:25,242 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:25,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,443 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:25,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:25,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1025080129, now seen corresponding path program 1 times [2019-11-23 22:13:25,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:25,445 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722884756] [2019-11-23 22:13:25,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:25,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722884756] [2019-11-23 22:13:25,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111319753] [2019-11-23 22:13:25,553 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 22:13:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:25,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:13:25,597 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 22:13:25,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:25,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 10 [2019-11-23 22:13:25,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653698932] [2019-11-23 22:13:25,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 22:13:25,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:25,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 22:13:25,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:13:25,606 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 10 states. [2019-11-23 22:13:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:25,728 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-23 22:13:25,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:13:25,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2019-11-23 22:13:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:25,729 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:13:25,729 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:13:25,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-23 22:13:25,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:13:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2019-11-23 22:13:25,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:13:25,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-23 22:13:25,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2019-11-23 22:13:25,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:25,736 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-23 22:13:25,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 22:13:25,736 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-23 22:13:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:13:25,737 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:25,737 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:25,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:25,947 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1046967233, now seen corresponding path program 2 times [2019-11-23 22:13:25,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:25,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325238883] [2019-11-23 22:13:25,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:26,021 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:13:26,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325238883] [2019-11-23 22:13:26,022 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201435608] [2019-11-23 22:13:26,022 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 22:13:26,075 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:26,075 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:26,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 22:13:26,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-23 22:13:26,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:26,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-23 22:13:26,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246717045] [2019-11-23 22:13:26,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:13:26,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:26,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:13:26,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:13:26,133 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2019-11-23 22:13:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:26,320 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2019-11-23 22:13:26,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:13:26,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-11-23 22:13:26,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:26,324 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:13:26,324 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 22:13:26,328 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2019-11-23 22:13:26,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 22:13:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-23 22:13:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-23 22:13:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2019-11-23 22:13:26,340 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 26 [2019-11-23 22:13:26,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:26,340 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2019-11-23 22:13:26,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:13:26,341 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2019-11-23 22:13:26,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 22:13:26,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:26,342 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:26,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:26,546 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:26,546 INFO L82 PathProgramCache]: Analyzing trace with hash -914226221, now seen corresponding path program 3 times [2019-11-23 22:13:26,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:26,547 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817114520] [2019-11-23 22:13:26,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:26,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 22:13:26,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817114520] [2019-11-23 22:13:26,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:13:26,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 22:13:26,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742351237] [2019-11-23 22:13:26,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 22:13:26,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:26,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 22:13:26,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 22:13:26,636 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2019-11-23 22:13:26,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:26,699 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2019-11-23 22:13:26,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 22:13:26,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-11-23 22:13:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:26,700 INFO L225 Difference]: With dead ends: 65 [2019-11-23 22:13:26,700 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:13:26,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:13:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:13:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-11-23 22:13:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:13:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-11-23 22:13:26,707 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 37 [2019-11-23 22:13:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:26,707 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-11-23 22:13:26,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 22:13:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-11-23 22:13:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:13:26,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:26,709 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:26,709 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:26,709 INFO L82 PathProgramCache]: Analyzing trace with hash 645625473, now seen corresponding path program 4 times [2019-11-23 22:13:26,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:26,710 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990296201] [2019-11-23 22:13:26,710 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:26,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:26,798 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 22:13:26,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990296201] [2019-11-23 22:13:26,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791709877] [2019-11-23 22:13:26,799 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 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 22:13:26,862 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:26,862 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:26,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-23 22:13:26,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:27,073 INFO L343 Elim1Store]: treesize reduction 182, result has 11.7 percent of original size [2019-11-23 22:13:27,073 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 44 [2019-11-23 22:13:27,075 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:27,085 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:27,086 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:27,086 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:69, output treesize:27 [2019-11-23 22:13:27,158 INFO L343 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2019-11-23 22:13:27,159 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2019-11-23 22:13:27,159 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:27,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:27,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:27,161 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2019-11-23 22:13:27,181 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 22:13:27,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:27,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12] total 17 [2019-11-23 22:13:27,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750332412] [2019-11-23 22:13:27,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:13:27,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:13:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:13:27,183 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 17 states. [2019-11-23 22:13:27,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:27,879 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2019-11-23 22:13:27,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:13:27,879 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-11-23 22:13:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:27,880 INFO L225 Difference]: With dead ends: 90 [2019-11-23 22:13:27,880 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:13:27,881 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2019-11-23 22:13:27,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:13:27,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2019-11-23 22:13:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:13:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2019-11-23 22:13:27,890 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 40 [2019-11-23 22:13:27,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:27,890 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2019-11-23 22:13:27,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:13:27,890 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2019-11-23 22:13:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 22:13:27,892 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:27,892 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:28,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:28,105 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:28,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:28,106 INFO L82 PathProgramCache]: Analyzing trace with hash 483806691, now seen corresponding path program 5 times [2019-11-23 22:13:28,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:28,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093882533] [2019-11-23 22:13:28,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:13:28,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093882533] [2019-11-23 22:13:28,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530234862] [2019-11-23 22:13:28,215 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 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 22:13:28,287 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 22:13:28,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:28,288 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-23 22:13:28,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:28,594 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2019-11-23 22:13:28,595 INFO L343 Elim1Store]: treesize reduction 204, result has 42.0 percent of original size [2019-11-23 22:13:28,596 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 65 treesize of output 167 [2019-11-23 22:13:28,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,603 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,616 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,618 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,641 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,642 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,652 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,654 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,656 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,657 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,665 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,667 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,671 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,685 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:28,809 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 36 [2019-11-23 22:13:28,810 INFO L567 ElimStorePlain]: treesize reduction 1000, result has 8.9 percent of original size [2019-11-23 22:13:28,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,820 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 22:13:28,820 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:73, output treesize:95 [2019-11-23 22:13:28,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,821 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:28,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,042 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-23 22:13:29,049 INFO L392 ElimStorePlain]: Different costs {2=[v_prenex_3, v_prenex_6], 12=[|#memory_int|]} [2019-11-23 22:13:29,055 INFO L343 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2019-11-23 22:13:29,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 20 [2019-11-23 22:13:29,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:29,109 INFO L567 ElimStorePlain]: treesize reduction 35, result has 69.8 percent of original size [2019-11-23 22:13:29,109 INFO L464 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2019-11-23 22:13:29,171 INFO L343 Elim1Store]: treesize reduction 35, result has 67.0 percent of original size [2019-11-23 22:13:29,171 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 101 [2019-11-23 22:13:29,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,181 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,194 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,202 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:29,250 INFO L567 ElimStorePlain]: treesize reduction 185, result has 15.9 percent of original size [2019-11-23 22:13:29,251 INFO L496 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 3 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-23 22:13:29,251 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 10 variables, input treesize:156, output treesize:28 [2019-11-23 22:13:29,305 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 25 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 22:13:29,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:29,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 22 [2019-11-23 22:13:29,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064863231] [2019-11-23 22:13:29,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:13:29,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:29,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:13:29,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:13:29,316 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 22 states. [2019-11-23 22:13:33,868 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2019-11-23 22:13:34,296 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2019-11-23 22:13:34,905 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 73 [2019-11-23 22:13:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:35,343 INFO L93 Difference]: Finished difference Result 196 states and 255 transitions. [2019-11-23 22:13:35,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2019-11-23 22:13:35,345 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2019-11-23 22:13:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:35,354 INFO L225 Difference]: With dead ends: 196 [2019-11-23 22:13:35,354 INFO L226 Difference]: Without dead ends: 179 [2019-11-23 22:13:35,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2523 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1444, Invalid=7112, Unknown=0, NotChecked=0, Total=8556 [2019-11-23 22:13:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-23 22:13:35,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 77. [2019-11-23 22:13:35,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:13:35,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 96 transitions. [2019-11-23 22:13:35,388 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 96 transitions. Word has length 43 [2019-11-23 22:13:35,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:35,392 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 96 transitions. [2019-11-23 22:13:35,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:13:35,392 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 96 transitions. [2019-11-23 22:13:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:13:35,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:35,396 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:35,602 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:35,602 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1146237553, now seen corresponding path program 6 times [2019-11-23 22:13:35,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:35,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501099164] [2019-11-23 22:13:35,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-11-23 22:13:35,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501099164] [2019-11-23 22:13:35,717 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15051089] [2019-11-23 22:13:35,718 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-23 22:13:35,779 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 22:13:35,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:35,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 22:13:35,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 22:13:35,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:35,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2019-11-23 22:13:35,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005458765] [2019-11-23 22:13:35,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 22:13:35,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:35,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 22:13:35,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-23 22:13:35,876 INFO L87 Difference]: Start difference. First operand 77 states and 96 transitions. Second operand 12 states. [2019-11-23 22:13:36,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:36,344 INFO L93 Difference]: Finished difference Result 189 states and 244 transitions. [2019-11-23 22:13:36,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 22:13:36,345 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-23 22:13:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:36,347 INFO L225 Difference]: With dead ends: 189 [2019-11-23 22:13:36,347 INFO L226 Difference]: Without dead ends: 174 [2019-11-23 22:13:36,348 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 22:13:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-23 22:13:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 113. [2019-11-23 22:13:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-23 22:13:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 142 transitions. [2019-11-23 22:13:36,364 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 142 transitions. Word has length 46 [2019-11-23 22:13:36,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:36,364 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 142 transitions. [2019-11-23 22:13:36,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 22:13:36,364 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 142 transitions. [2019-11-23 22:13:36,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:13:36,365 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:36,366 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:36,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,569 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1137486899, now seen corresponding path program 1 times [2019-11-23 22:13:36,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:36,570 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836294161] [2019-11-23 22:13:36,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:36,762 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 64 proven. 75 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-11-23 22:13:36,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836294161] [2019-11-23 22:13:36,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293169601] [2019-11-23 22:13:36,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:36,820 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 22:13:36,822 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 61 proven. 12 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-11-23 22:13:36,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:36,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 22 [2019-11-23 22:13:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945010196] [2019-11-23 22:13:36,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 22:13:36,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 22:13:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2019-11-23 22:13:36,937 INFO L87 Difference]: Start difference. First operand 113 states and 142 transitions. Second operand 22 states. [2019-11-23 22:13:37,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:37,908 INFO L93 Difference]: Finished difference Result 256 states and 329 transitions. [2019-11-23 22:13:37,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:13:37,909 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2019-11-23 22:13:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:37,910 INFO L225 Difference]: With dead ends: 256 [2019-11-23 22:13:37,911 INFO L226 Difference]: Without dead ends: 129 [2019-11-23 22:13:37,913 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=316, Invalid=1324, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:13:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-23 22:13:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2019-11-23 22:13:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-23 22:13:37,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2019-11-23 22:13:37,927 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 60 [2019-11-23 22:13:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:37,927 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2019-11-23 22:13:37,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 22:13:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2019-11-23 22:13:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 22:13:37,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:37,928 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:38,132 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:38,132 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -915084575, now seen corresponding path program 2 times [2019-11-23 22:13:38,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:38,133 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948434515] [2019-11-23 22:13:38,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:38,442 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-11-23 22:13:38,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948434515] [2019-11-23 22:13:38,443 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966392016] [2019-11-23 22:13:38,443 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:38,493 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:38,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:38,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-23 22:13:38,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:38,523 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,523 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-23 22:13:38,524 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,552 INFO L567 ElimStorePlain]: treesize reduction 10, result has 78.3 percent of original size [2019-11-23 22:13:38,552 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,553 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:36 [2019-11-23 22:13:38,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:38,603 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,603 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2019-11-23 22:13:38,604 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,621 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,621 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 55 [2019-11-23 22:13:38,622 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,645 INFO L567 ElimStorePlain]: treesize reduction 34, result has 43.3 percent of original size [2019-11-23 22:13:38,646 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,646 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:73, output treesize:26 [2019-11-23 22:13:38,677 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:13:38,679 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2019-11-23 22:13:38,680 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,688 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,689 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 22:13:38,689 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:37 [2019-11-23 22:13:38,726 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:13:38,739 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,739 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-11-23 22:13:38,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,766 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-11-23 22:13:38,766 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 22:13:38,767 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-11-23 22:13:38,798 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:13:38,810 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,811 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-11-23 22:13:38,811 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,838 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-11-23 22:13:38,839 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 22:13:38,839 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-11-23 22:13:38,878 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:13:38,891 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,891 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-11-23 22:13:38,892 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,925 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-11-23 22:13:38,926 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-23 22:13:38,927 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48 [2019-11-23 22:13:38,956 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 22:13:38,970 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:38,970 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 86 [2019-11-23 22:13:38,971 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:38,998 INFO L567 ElimStorePlain]: treesize reduction 36, result has 57.1 percent of original size [2019-11-23 22:13:38,999 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 22:13:38,999 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:52, output treesize:48 [2019-11-23 22:13:47,044 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 33 [2019-11-23 22:13:49,109 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 35 [2019-11-23 22:13:51,152 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 36 [2019-11-23 22:13:53,194 WARN L192 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 36 [2019-11-23 22:13:55,254 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 38 [2019-11-23 22:13:57,303 WARN L192 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 39 [2019-11-23 22:13:57,314 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 22:13:57,315 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 35 [2019-11-23 22:13:57,316 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 22:13:57,328 INFO L567 ElimStorePlain]: treesize reduction 16, result has 40.7 percent of original size [2019-11-23 22:13:57,328 INFO L496 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 22:13:57,329 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:55, output treesize:7 [2019-11-23 22:13:57,369 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 82 proven. 16 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-23 22:13:57,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 22:13:57,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2019-11-23 22:13:57,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977002418] [2019-11-23 22:13:57,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:13:57,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:57,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:13:57,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=436, Unknown=3, NotChecked=0, Total=506 [2019-11-23 22:13:57,371 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand 23 states. [2019-11-23 22:14:17,642 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 45 [2019-11-23 22:14:19,706 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 45 [2019-11-23 22:14:21,788 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2019-11-23 22:14:25,906 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2019-11-23 22:14:30,016 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2019-11-23 22:14:34,126 WARN L192 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2019-11-23 22:14:38,255 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2019-11-23 22:14:42,370 WARN L192 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2019-11-23 22:14:46,519 WARN L192 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2019-11-23 22:14:50,667 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2019-11-23 22:14:54,810 WARN L192 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2019-11-23 22:14:58,981 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 57