/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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:29:37,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:29:37,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:29:37,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:29:37,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:29:37,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:29:37,107 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:29:37,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:29:37,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:29:37,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:29:37,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:29:37,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:29:37,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:29:37,115 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:29:37,116 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:29:37,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:29:37,118 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:29:37,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:29:37,121 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:29:37,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:29:37,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:29:37,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:29:37,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:29:37,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:29:37,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:29:37,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:29:37,138 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:29:37,139 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:29:37,139 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 20:29:37,153 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:29:37,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:29:37,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:29:37,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:29:37,155 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:29:37,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:29:37,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:29:37,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:29:37,156 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:29:37,156 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:29:37,156 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:29:37,157 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:29:37,157 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:29:37,157 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:29:37,157 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:29:37,157 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:29:37,158 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:29:37,158 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:29:37,158 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:29:37,158 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:29:37,158 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:29:37,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:29:37,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:29:37,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:29:37,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:29:37,159 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:29:37,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:29:37,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:29:37,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:29:37,160 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:29:37,439 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:29:37,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:29:37,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:29:37,456 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:29:37,457 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:29:37,458 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-23 20:29:37,538 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db82ffb8/b4777a73884f47399324ab015cc2e5b3/FLAGb6791542b [2019-11-23 20:29:38,055 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:29:38,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2019-11-23 20:29:38,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db82ffb8/b4777a73884f47399324ab015cc2e5b3/FLAGb6791542b [2019-11-23 20:29:38,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1db82ffb8/b4777a73884f47399324ab015cc2e5b3 [2019-11-23 20:29:38,409 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:29:38,411 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:29:38,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:38,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:29:38,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:29:38,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20db89d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38, skipping insertion in model container [2019-11-23 20:29:38,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:29:38,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:29:38,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:38,677 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:29:38,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:29:38,716 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:29:38,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38 WrapperNode [2019-11-23 20:29:38,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:29:38,718 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:38,718 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:29:38,718 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:29:38,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,815 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,848 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:29:38,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:29:38,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:29:38,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:29:38,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,860 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (1/1) ... [2019-11-23 20:29:38,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:29:38,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:29:38,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:29:38,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:29:38,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (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 20:29:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:29:38,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:29:38,935 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:29:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:29:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:29:38,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:29:39,249 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:29:39,249 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-23 20:29:39,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:39 BoogieIcfgContainer [2019-11-23 20:29:39,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:29:39,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:29:39,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:29:39,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:29:39,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:29:38" (1/3) ... [2019-11-23 20:29:39,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b959132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:39, skipping insertion in model container [2019-11-23 20:29:39,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:29:38" (2/3) ... [2019-11-23 20:29:39,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b959132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:29:39, skipping insertion in model container [2019-11-23 20:29:39,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:29:39" (3/3) ... [2019-11-23 20:29:39,258 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2019-11-23 20:29:39,268 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:29:39,274 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:29:39,285 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:29:39,307 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:29:39,308 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:29:39,308 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:29:39,308 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:29:39,308 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:29:39,308 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:29:39,308 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:29:39,309 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:29:39,322 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-23 20:29:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:29:39,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:39,329 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:39,330 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:39,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:39,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2019-11-23 20:29:39,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:39,343 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826435650] [2019-11-23 20:29:39,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,511 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 20:29:39,512 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826435650] [2019-11-23 20:29:39,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:29:39,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:29:39,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606971658] [2019-11-23 20:29:39,523 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:29:39,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:29:39,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:29:39,543 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-23 20:29:39,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:39,688 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2019-11-23 20:29:39,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:29:39,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:29:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:39,704 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:29:39,704 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:29:39,711 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 20:29:39,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:29:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-23 20:29:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:29:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2019-11-23 20:29:39,756 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2019-11-23 20:29:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:39,757 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2019-11-23 20:29:39,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:29:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2019-11-23 20:29:39,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:29:39,758 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:39,758 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] [2019-11-23 20:29:39,759 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2019-11-23 20:29:39,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:39,760 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102535060] [2019-11-23 20:29:39,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:29:39,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102535060] [2019-11-23 20:29:39,856 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553229794] [2019-11-23 20:29:39,856 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 20:29:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:39,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:29:39,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:39,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:29:39,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:39,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:29:39,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461571154] [2019-11-23 20:29:39,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:29:39,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:29:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:29:39,966 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2019-11-23 20:29:40,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:40,074 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-23 20:29:40,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:29:40,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-23 20:29:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:40,076 INFO L225 Difference]: With dead ends: 54 [2019-11-23 20:29:40,076 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:29:40,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 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 20:29:40,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:29:40,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-23 20:29:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:29:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:29:40,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2019-11-23 20:29:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:40,085 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:29:40,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:29:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:29:40,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:29:40,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:40,087 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:40,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:40,300 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2019-11-23 20:29:40,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:40,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96963462] [2019-11-23 20:29:40,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:29:40,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96963462] [2019-11-23 20:29:40,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973656636] [2019-11-23 20:29:40,424 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 20:29:40,484 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:40,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:40,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:29:40,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:29:40,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:40,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:29:40,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133877891] [2019-11-23 20:29:40,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:29:40,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:40,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:29:40,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:29:40,505 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2019-11-23 20:29:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:40,640 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2019-11-23 20:29:40,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:29:40,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2019-11-23 20:29:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:40,643 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:29:40,643 INFO L226 Difference]: Without dead ends: 38 [2019-11-23 20:29:40,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 20:29:40,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-23 20:29:40,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-23 20:29:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:29:40,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-11-23 20:29:40,669 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2019-11-23 20:29:40,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:40,670 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-11-23 20:29:40,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:29:40,670 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-11-23 20:29:40,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:29:40,672 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:40,673 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:40,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:40,880 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:40,881 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2019-11-23 20:29:40,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:40,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786231421] [2019-11-23 20:29:40,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:41,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:29:41,017 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786231421] [2019-11-23 20:29:41,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346936040] [2019-11-23 20:29:41,018 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 20:29:41,112 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:29:41,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:41,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:29:41,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:29:41,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:41,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:29:41,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251697886] [2019-11-23 20:29:41,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:29:41,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:29:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:29:41,148 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2019-11-23 20:29:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:41,255 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2019-11-23 20:29:41,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:29:41,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-11-23 20:29:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:41,260 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:29:41,260 INFO L226 Difference]: Without dead ends: 44 [2019-11-23 20:29:41,261 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 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 20:29:41,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-23 20:29:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-23 20:29:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:29:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2019-11-23 20:29:41,270 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2019-11-23 20:29:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:41,271 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2019-11-23 20:29:41,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:29:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2019-11-23 20:29:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:29:41,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:41,272 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:41,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:41,478 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2019-11-23 20:29:41,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:41,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403600154] [2019-11-23 20:29:41,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:29:41,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403600154] [2019-11-23 20:29:41,615 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071277075] [2019-11-23 20:29:41,615 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 20:29:41,673 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:41,673 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:41,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:29:41,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-23 20:29:41,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:41,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:29:41,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796169996] [2019-11-23 20:29:41,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:29:41,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:41,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:29:41,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:29:41,693 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2019-11-23 20:29:41,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:41,798 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2019-11-23 20:29:41,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:29:41,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-11-23 20:29:41,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:41,800 INFO L225 Difference]: With dead ends: 87 [2019-11-23 20:29:41,800 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:29:41,800 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 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 20:29:41,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:29:41,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-23 20:29:41,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-23 20:29:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2019-11-23 20:29:41,808 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2019-11-23 20:29:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:41,808 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2019-11-23 20:29:41,808 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:29:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2019-11-23 20:29:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:29:41,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:41,810 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:42,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:42,026 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:42,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:42,027 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2019-11-23 20:29:42,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:42,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433981631] [2019-11-23 20:29:42,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:42,194 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:29:42,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433981631] [2019-11-23 20:29:42,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070847024] [2019-11-23 20:29:42,196 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 20:29:42,778 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:29:42,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:42,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:29:42,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:29:42,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:42,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:29:42,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495294946] [2019-11-23 20:29:42,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:29:42,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:42,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:29:42,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:29:42,822 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2019-11-23 20:29:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:42,947 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2019-11-23 20:29:42,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:29:42,948 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-11-23 20:29:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:42,949 INFO L225 Difference]: With dead ends: 98 [2019-11-23 20:29:42,949 INFO L226 Difference]: Without dead ends: 56 [2019-11-23 20:29:42,950 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 20:29:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-23 20:29:42,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-23 20:29:42,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:29:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:29:42,958 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2019-11-23 20:29:42,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:42,959 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:29:42,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:29:42,959 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:29:42,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-23 20:29:42,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:42,961 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:43,175 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:43,175 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:43,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:43,176 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2019-11-23 20:29:43,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:43,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936843571] [2019-11-23 20:29:43,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:29:43,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936843571] [2019-11-23 20:29:43,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591191085] [2019-11-23 20:29:43,403 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 20:29:44,080 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:29:44,080 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:44,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:29:44,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:29:44,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:44,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:29:44,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378064521] [2019-11-23 20:29:44,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:29:44,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:44,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:29:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:29:44,107 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2019-11-23 20:29:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:44,223 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2019-11-23 20:29:44,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:29:44,223 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2019-11-23 20:29:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:44,224 INFO L225 Difference]: With dead ends: 109 [2019-11-23 20:29:44,224 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:29:44,225 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 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 20:29:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:29:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-23 20:29:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:29:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2019-11-23 20:29:44,232 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2019-11-23 20:29:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:44,232 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2019-11-23 20:29:44,233 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:29:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2019-11-23 20:29:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:29:44,234 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:44,234 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:44,439 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:44,439 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2019-11-23 20:29:44,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:44,441 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684190456] [2019-11-23 20:29:44,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:44,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:29:44,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684190456] [2019-11-23 20:29:44,600 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827747398] [2019-11-23 20:29:44,600 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 20:29:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:44,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:29:44,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2019-11-23 20:29:44,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:44,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:29:44,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252340059] [2019-11-23 20:29:44,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:29:44,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:29:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:29:44,712 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2019-11-23 20:29:44,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:44,834 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-11-23 20:29:44,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:29:44,835 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-11-23 20:29:44,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:44,836 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:29:44,836 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:29:44,837 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 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 20:29:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:29:44,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-23 20:29:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-23 20:29:44,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2019-11-23 20:29:44,844 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2019-11-23 20:29:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:44,844 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2019-11-23 20:29:44,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:29:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2019-11-23 20:29:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:29:44,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:44,846 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:45,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:45,058 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:45,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:45,059 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2019-11-23 20:29:45,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:45,059 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934637503] [2019-11-23 20:29:45,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:45,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934637503] [2019-11-23 20:29:45,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607777621] [2019-11-23 20:29:45,186 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 20:29:45,261 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:29:45,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:45,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:29:45,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:45,295 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-11-23 20:29:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:45,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:29:45,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599925188] [2019-11-23 20:29:45,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:29:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:29:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:29:45,297 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2019-11-23 20:29:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:45,415 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2019-11-23 20:29:45,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:29:45,416 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2019-11-23 20:29:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:45,416 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:29:45,417 INFO L226 Difference]: Without dead ends: 74 [2019-11-23 20:29:45,418 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 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 20:29:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-23 20:29:45,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-23 20:29:45,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:29:45,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2019-11-23 20:29:45,426 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2019-11-23 20:29:45,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:45,427 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2019-11-23 20:29:45,427 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:29:45,427 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2019-11-23 20:29:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:29:45,428 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:45,428 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:45,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:45,638 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:45,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2019-11-23 20:29:45,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:45,639 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67871184] [2019-11-23 20:29:45,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:45,794 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:29:45,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67871184] [2019-11-23 20:29:45,794 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362290808] [2019-11-23 20:29:45,794 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 [2019-11-23 20:29:53,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:29:53,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:53,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:29:53,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:29:53,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:53,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:29:53,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645828730] [2019-11-23 20:29:53,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:29:53,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:29:53,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:29:53,204 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 13 states. [2019-11-23 20:29:53,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:53,360 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2019-11-23 20:29:53,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:29:53,361 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2019-11-23 20:29:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:53,362 INFO L225 Difference]: With dead ends: 142 [2019-11-23 20:29:53,362 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:29:53,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:29:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:29:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-23 20:29:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:29:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2019-11-23 20:29:53,372 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2019-11-23 20:29:53,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:53,372 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2019-11-23 20:29:53,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:29:53,372 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2019-11-23 20:29:53,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:29:53,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:53,373 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:53,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:53,575 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:53,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:53,575 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2019-11-23 20:29:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:53,576 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033956115] [2019-11-23 20:29:53,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-23 20:29:53,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033956115] [2019-11-23 20:29:53,721 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607224352] [2019-11-23 20:29:53,721 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 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 20:29:53,800 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:29:53,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:29:53,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:29:53,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:29:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-23 20:29:53,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:29:53,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:29:53,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25023993] [2019-11-23 20:29:53,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:29:53,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:29:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:29:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:53,845 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2019-11-23 20:29:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:29:54,011 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2019-11-23 20:29:54,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:29:54,011 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2019-11-23 20:29:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:29:54,012 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:29:54,012 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:29:54,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:29:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:29:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-23 20:29:54,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:29:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2019-11-23 20:29:54,025 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2019-11-23 20:29:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:29:54,025 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2019-11-23 20:29:54,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:29:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2019-11-23 20:29:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:29:54,027 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:29:54,027 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:29:54,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:29:54,231 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:29:54,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:29:54,231 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2019-11-23 20:29:54,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:29:54,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570560020] [2019-11-23 20:29:54,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:29:54,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:29:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:29:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570560020] [2019-11-23 20:29:54,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717338217] [2019-11-23 20:29:54,394 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 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