/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/array-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:29:44,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:29:44,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:29:44,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:29:44,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:29:44,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:29:44,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:29:44,627 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:29:44,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:29:44,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:29:44,633 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:29:44,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:29:44,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:29:44,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:29:44,637 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:29:44,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:29:44,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:29:44,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:29:44,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:29:44,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:29:44,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:29:44,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:29:44,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:29:44,647 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:29:44,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:29:44,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:29:44,657 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:29:44,658 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:29:44,659 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 20:29:44,673 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:29:44,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:29:44,674 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:29:44,675 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:29:44,675 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:29:44,675 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:29:44,675 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:29:44,675 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:29:44,676 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:29:44,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:29:44,676 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:29:44,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:29:44,676 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:29:44,677 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:29:44,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:29:44,677 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:29:44,677 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:29:44,677 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:29:44,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:29:44,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:29:44,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:29:44,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:29:44,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:44,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:29:44,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:29:44,679 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:29:44,679 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:29:44,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:29:44,679 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:29:44,680 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:29:44,946 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:29:44,963 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:29:44,967 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:29:44,968 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:29:44,968 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:29:44,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-11-23 20:29:45,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c446cf18/fef9bfab896048408b1aa2cf34c6e58f/FLAG07fc52586 [2019-11-23 20:29:45,535 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:29:45,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2019-11-23 20:29:45,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c446cf18/fef9bfab896048408b1aa2cf34c6e58f/FLAG07fc52586 [2019-11-23 20:29:45,883 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c446cf18/fef9bfab896048408b1aa2cf34c6e58f [2019-11-23 20:29:45,893 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:29:45,894 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:29:45,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:45,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:29:45,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:29:45,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:45" (1/1) ... [2019-11-23 20:29:45,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37701bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:45, skipping insertion in model container [2019-11-23 20:29:45,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:45" (1/1) ... [2019-11-23 20:29:45,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:29:45,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:29:46,211 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:46,216 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:29:46,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:46,352 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:29:46,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46 WrapperNode [2019-11-23 20:29:46,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:46,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:46,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:29:46,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:29:46,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,382 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,406 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:46,406 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:29:46,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:29:46,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:29:46,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,417 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,423 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,437 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (1/1) ... [2019-11-23 20:29:46,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:29:46,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:29:46,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:29:46,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:29:46,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (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 20:29:46,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:29:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:29:46,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:29:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:29:46,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:29:46,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:29:46,818 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:29:46,818 INFO L284 CfgBuilder]: Removed 15 assume(true) statements. [2019-11-23 20:29:46,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:46 BoogieIcfgContainer [2019-11-23 20:29:46,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:29:46,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:29:46,821 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:29:46,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:29:46,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:29:45" (1/3) ... [2019-11-23 20:29:46,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d764a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:46, skipping insertion in model container [2019-11-23 20:29:46,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:46" (2/3) ... [2019-11-23 20:29:46,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d764a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:46, skipping insertion in model container [2019-11-23 20:29:46,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:46" (3/3) ... [2019-11-23 20:29:46,827 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2019-11-23 20:29:46,837 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:29:46,844 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:29:46,856 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:29:46,878 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:29:46,879 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:29:46,879 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:29:46,879 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:29:46,879 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:29:46,879 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:29:46,879 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:29:46,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:29:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-23 20:29:46,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:29:46,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:46,906 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:46,906 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:46,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:46,917 INFO L82 PathProgramCache]: Analyzing trace with hash 730030661, now seen corresponding path program 1 times [2019-11-23 20:29:46,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:46,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072625714] [2019-11-23 20:29:46,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:47,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:47,082 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 20:29:47,083 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072625714] [2019-11-23 20:29:47,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:29:47,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:29:47,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600569114] [2019-11-23 20:29:47,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:29:47,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:47,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:29:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:47,103 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-23 20:29:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:47,249 INFO L93 Difference]: Finished difference Result 61 states and 111 transitions. [2019-11-23 20:29:47,251 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:29:47,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2019-11-23 20:29:47,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:47,264 INFO L225 Difference]: With dead ends: 61 [2019-11-23 20:29:47,265 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:29:47,270 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 20:29:47,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:29:47,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:29:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:29:47,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-23 20:29:47,314 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 21 [2019-11-23 20:29:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:47,314 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-23 20:29:47,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:29:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-23 20:29:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:29:47,318 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:47,318 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:47,318 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:47,319 INFO L82 PathProgramCache]: Analyzing trace with hash 798141757, now seen corresponding path program 1 times [2019-11-23 20:29:47,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:47,320 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893237031] [2019-11-23 20:29:47,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:29:47,421 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893237031] [2019-11-23 20:29:47,422 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403214028] [2019-11-23 20:29:47,422 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 20:29:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:47,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:29:47,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:29:47,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:47,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:29:47,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049926171] [2019-11-23 20:29:47,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:29:47,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:29:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:47,521 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states. [2019-11-23 20:29:47,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:47,657 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2019-11-23 20:29:47,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:29:47,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2019-11-23 20:29:47,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:47,659 INFO L225 Difference]: With dead ends: 68 [2019-11-23 20:29:47,659 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:29:47,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 20:29:47,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:29:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-23 20:29:47,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:29:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-23 20:29:47,669 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 29 [2019-11-23 20:29:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:47,670 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-23 20:29:47,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:29:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-23 20:29:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:29:47,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:47,672 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:47,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:47,884 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1968111935, now seen corresponding path program 2 times [2019-11-23 20:29:47,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:47,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914149922] [2019-11-23 20:29:47,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:47,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:29:48,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914149922] [2019-11-23 20:29:48,002 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216512413] [2019-11-23 20:29:48,002 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 20:29:48,087 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:48,087 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:48,090 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:29:48,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:29:48,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:48,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:29:48,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387261588] [2019-11-23 20:29:48,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:29:48,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:48,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:29:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:48,144 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2019-11-23 20:29:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:48,320 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2019-11-23 20:29:48,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:29:48,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-23 20:29:48,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:48,321 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:29:48,322 INFO L226 Difference]: Without dead ends: 48 [2019-11-23 20:29:48,322 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:48,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-23 20:29:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-23 20:29:48,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:29:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-11-23 20:29:48,330 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 37 [2019-11-23 20:29:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:48,331 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-11-23 20:29:48,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:29:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-11-23 20:29:48,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:29:48,332 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:48,333 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:48,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:48,545 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1959606083, now seen corresponding path program 3 times [2019-11-23 20:29:48,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:48,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173806787] [2019-11-23 20:29:48,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:29:48,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173806787] [2019-11-23 20:29:48,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123799228] [2019-11-23 20:29:48,653 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:48,762 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:29:48,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:48,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:29:48,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:29:48,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:48,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:29:48,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333300421] [2019-11-23 20:29:48,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:29:48,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:29:48,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:48,784 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2019-11-23 20:29:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:48,930 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2019-11-23 20:29:48,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:29:48,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2019-11-23 20:29:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:48,932 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:29:48,932 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:29:48,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:48,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:29:48,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:29:48,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:29:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-11-23 20:29:48,942 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 45 [2019-11-23 20:29:48,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:48,942 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-11-23 20:29:48,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:29:48,942 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-11-23 20:29:48,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:29:48,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:48,944 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:49,148 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:49,149 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:49,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:49,149 INFO L82 PathProgramCache]: Analyzing trace with hash -33175999, now seen corresponding path program 4 times [2019-11-23 20:29:49,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:49,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237340837] [2019-11-23 20:29:49,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:49,327 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:29:49,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237340837] [2019-11-23 20:29:49,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755132947] [2019-11-23 20:29:49,328 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:49,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:49,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:49,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:29:49,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:29:49,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:49,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:29:49,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620491640] [2019-11-23 20:29:49,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:29:49,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:49,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:29:49,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:49,414 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2019-11-23 20:29:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:49,552 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2019-11-23 20:29:49,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:29:49,553 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2019-11-23 20:29:49,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:49,554 INFO L225 Difference]: With dead ends: 113 [2019-11-23 20:29:49,554 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:29:49,555 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:49,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:29:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-23 20:29:49,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:29:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-11-23 20:29:49,564 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 53 [2019-11-23 20:29:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:49,564 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-11-23 20:29:49,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:29:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-11-23 20:29:49,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:29:49,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:49,567 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:49,778 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:49,780 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:49,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:49,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1705114563, now seen corresponding path program 5 times [2019-11-23 20:29:49,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:49,781 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732073967] [2019-11-23 20:29:49,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:29:49,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732073967] [2019-11-23 20:29:49,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595582378] [2019-11-23 20:29:49,955 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:24,155 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:30:24,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:24,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:30:24,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:30:24,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:24,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:30:24,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868232750] [2019-11-23 20:30:24,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:30:24,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:24,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:30:24,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:30:24,203 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2019-11-23 20:30:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:24,405 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2019-11-23 20:30:24,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:30:24,406 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2019-11-23 20:30:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:24,407 INFO L225 Difference]: With dead ends: 128 [2019-11-23 20:30:24,407 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:30:24,408 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:30:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:30:24,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-23 20:30:24,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:30:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-11-23 20:30:24,416 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 61 [2019-11-23 20:30:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:24,417 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-11-23 20:30:24,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:30:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-11-23 20:30:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:30:24,418 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:24,419 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:24,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:24,619 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:24,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:24,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1731269183, now seen corresponding path program 6 times [2019-11-23 20:30:24,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:24,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607706431] [2019-11-23 20:30:24,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:30:24,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607706431] [2019-11-23 20:30:24,725 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944315730] [2019-11-23 20:30:24,725 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 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 20:30:26,878 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:30:26,878 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:26,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:30:26,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:26,911 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:30:26,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:26,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:30:26,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498478080] [2019-11-23 20:30:26,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:30:26,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:26,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:30:26,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:30:26,913 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2019-11-23 20:30:27,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:27,088 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2019-11-23 20:30:27,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:30:27,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2019-11-23 20:30:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:27,090 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:30:27,090 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:30:27,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:30:27,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:30:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 20:30:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:30:27,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-11-23 20:30:27,101 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 69 [2019-11-23 20:30:27,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:27,101 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-11-23 20:30:27,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:30:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-11-23 20:30:27,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:30:27,103 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:27,103 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:27,309 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:27,309 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:27,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1733009475, now seen corresponding path program 7 times [2019-11-23 20:30:27,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:27,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192276418] [2019-11-23 20:30:27,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:30:27,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192276418] [2019-11-23 20:30:27,485 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874923161] [2019-11-23 20:30:27,486 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:27,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:30:27,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-23 20:30:27,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:27,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:30:27,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263503556] [2019-11-23 20:30:27,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:30:27,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:27,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:30:27,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:30:27,585 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2019-11-23 20:30:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:27,735 INFO L93 Difference]: Finished difference Result 158 states and 181 transitions. [2019-11-23 20:30:27,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:30:27,735 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2019-11-23 20:30:27,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:27,736 INFO L225 Difference]: With dead ends: 158 [2019-11-23 20:30:27,736 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:30:27,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:30:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:30:27,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-23 20:30:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-23 20:30:27,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-11-23 20:30:27,745 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 77 [2019-11-23 20:30:27,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:27,746 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-11-23 20:30:27,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:30:27,746 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-11-23 20:30:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-23 20:30:27,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:27,747 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:27,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:27,958 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:27,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1139569985, now seen corresponding path program 8 times [2019-11-23 20:30:27,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:27,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048301252] [2019-11-23 20:30:27,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-23 20:30:28,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048301252] [2019-11-23 20:30:28,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927737918] [2019-11-23 20:30:28,116 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 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 20:30:28,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:30:28,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:30:28,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:30:28,197 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:30:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-23 20:30:28,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:30:28,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:30:28,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585782991] [2019-11-23 20:30:28,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:30:28,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:30:28,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:30:28,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:30:28,218 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2019-11-23 20:30:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:30:28,427 INFO L93 Difference]: Finished difference Result 173 states and 196 transitions. [2019-11-23 20:30:28,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:30:28,428 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2019-11-23 20:30:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:30:28,429 INFO L225 Difference]: With dead ends: 173 [2019-11-23 20:30:28,429 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:30:28,430 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:30:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:30:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-11-23 20:30:28,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-23 20:30:28,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-11-23 20:30:28,444 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 85 [2019-11-23 20:30:28,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:30:28,444 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-11-23 20:30:28,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:30:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-11-23 20:30:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-23 20:30:28,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:30:28,446 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:30:28,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:30:28,654 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:30:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:30:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1607850813, now seen corresponding path program 9 times [2019-11-23 20:30:28,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:30:28,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701764668] [2019-11-23 20:30:28,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:30:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:30:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-23 20:30:28,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701764668] [2019-11-23 20:30:28,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70281011] [2019-11-23 20:30:28,804 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 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