java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:56:56,077 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:56:56,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:56:56,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:56:56,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:56:56,100 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:56:56,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:56:56,103 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:56:56,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:56:56,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:56:56,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:56:56,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:56:56,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:56:56,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:56:56,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:56:56,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:56:56,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:56:56,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:56:56,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:56:56,117 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:56:56,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:56:56,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:56:56,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:56:56,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:56:56,124 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:56:56,128 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:56:56,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:56:56,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:56:56,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:56:56,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:56:56,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:56:56,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:56:56,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:56:56,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:56:56,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:56:56,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:56:56,135 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 [2019-10-14 21:56:56,149 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:56:56,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:56:56,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:56:56,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:56:56,151 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:56:56,151 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:56:56,151 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:56:56,152 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:56:56,153 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:56:56,153 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:56:56,153 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:56:56,153 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:56:56,153 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:56:56,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:56:56,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:56:56,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:56:56,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:56,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:56:56,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:56:56,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:56:56,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:56:56,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:56:56,155 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:56:56,156 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:56:56,427 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:56:56,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:56:56,453 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:56:56,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:56:56,454 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:56:56,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-14 21:56:56,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3f434ad/2bdd6f97c81044c3ab7f3a9aba669665/FLAG28de2bff8 [2019-10-14 21:56:57,120 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:56:57,121 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-14 21:56:57,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3f434ad/2bdd6f97c81044c3ab7f3a9aba669665/FLAG28de2bff8 [2019-10-14 21:56:57,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e3f434ad/2bdd6f97c81044c3ab7f3a9aba669665 [2019-10-14 21:56:57,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:56:57,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:56:57,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:57,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:56:57,377 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:56:57,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77521dd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:57, skipping insertion in model container [2019-10-14 21:56:57,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:56:57" (1/1) ... [2019-10-14 21:56:57,389 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:56:57,451 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:56:57,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:57,915 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:56:58,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:56:58,164 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:56:58,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58 WrapperNode [2019-10-14 21:56:58,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:56:58,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:56:58,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:56:58,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:56:58,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,257 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,262 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... [2019-10-14 21:56:58,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:56:58,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:56:58,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:56:58,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:56:58,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:56:58,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:56:58,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:56:58,344 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:56:58,344 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:56:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:56:58,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:56:59,619 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:56:59,619 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:56:59,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:59 BoogieIcfgContainer [2019-10-14 21:56:59,625 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:56:59,627 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:56:59,627 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:56:59,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:56:59,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:56:57" (1/3) ... [2019-10-14 21:56:59,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e627f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:59, skipping insertion in model container [2019-10-14 21:56:59,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:56:58" (2/3) ... [2019-10-14 21:56:59,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e627f55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:56:59, skipping insertion in model container [2019-10-14 21:56:59,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:56:59" (3/3) ... [2019-10-14 21:56:59,642 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-10-14 21:56:59,656 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:56:59,667 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:56:59,678 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:56:59,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:56:59,704 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:56:59,705 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:56:59,705 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:56:59,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:56:59,705 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:56:59,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:56:59,706 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:56:59,734 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:56:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:56:59,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:56:59,743 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:56:59,745 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:56:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:56:59,752 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-10-14 21:56:59,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:56:59,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645863222] [2019-10-14 21:56:59,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:56:59,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:56:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:00,086 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645863222] [2019-10-14 21:57:00,089 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:00,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:57:00,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813907388] [2019-10-14 21:57:00,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:00,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:00,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:57:00,119 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:02,100 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-14 21:57:02,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:02,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 21:57:02,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:02,121 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:02,121 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:02,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-14 21:57:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-14 21:57:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2019-10-14 21:57:02,214 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 20 [2019-10-14 21:57:02,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:02,214 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2019-10-14 21:57:02,215 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:02,215 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2019-10-14 21:57:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:57:02,220 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:02,220 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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] [2019-10-14 21:57:02,221 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-10-14 21:57:02,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:02,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266562566] [2019-10-14 21:57:02,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:02,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:02,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:02,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266562566] [2019-10-14 21:57:02,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080488493] [2019-10-14 21:57:02,538 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 [2019-10-14 21:57:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:02,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:02,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:02,715 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:02,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:57:02,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802522405] [2019-10-14 21:57:02,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:57:02,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:02,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:57:02,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:02,718 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 3 states. [2019-10-14 21:57:03,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:03,341 INFO L93 Difference]: Finished difference Result 880 states and 1198 transitions. [2019-10-14 21:57:03,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:57:03,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-14 21:57:03,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:03,348 INFO L225 Difference]: With dead ends: 880 [2019-10-14 21:57:03,349 INFO L226 Difference]: Without dead ends: 878 [2019-10-14 21:57:03,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-14 21:57:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 735. [2019-10-14 21:57:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-10-14 21:57:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1029 transitions. [2019-10-14 21:57:03,418 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1029 transitions. Word has length 99 [2019-10-14 21:57:03,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:03,420 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1029 transitions. [2019-10-14 21:57:03,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:57:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1029 transitions. [2019-10-14 21:57:03,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-14 21:57:03,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:03,433 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:03,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:03,644 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:03,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:03,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-10-14 21:57:03,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:03,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078990791] [2019-10-14 21:57:03,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:03,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:03,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:04,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:04,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078990791] [2019-10-14 21:57:04,052 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:04,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:57:04,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63558012] [2019-10-14 21:57:04,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:57:04,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:04,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:57:04,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:57:04,054 INFO L87 Difference]: Start difference. First operand 735 states and 1029 transitions. Second operand 9 states. [2019-10-14 21:57:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:05,455 INFO L93 Difference]: Finished difference Result 1790 states and 2576 transitions. [2019-10-14 21:57:05,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:57:05,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 142 [2019-10-14 21:57:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:05,463 INFO L225 Difference]: With dead ends: 1790 [2019-10-14 21:57:05,463 INFO L226 Difference]: Without dead ends: 1061 [2019-10-14 21:57:05,465 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:05,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2019-10-14 21:57:05,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1035. [2019-10-14 21:57:05,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1035 states. [2019-10-14 21:57:05,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1359 transitions. [2019-10-14 21:57:05,503 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1359 transitions. Word has length 142 [2019-10-14 21:57:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:05,504 INFO L462 AbstractCegarLoop]: Abstraction has 1035 states and 1359 transitions. [2019-10-14 21:57:05,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:57:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1359 transitions. [2019-10-14 21:57:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 21:57:05,506 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:05,506 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-10-14 21:57:05,507 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:05,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:05,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1389117779, now seen corresponding path program 1 times [2019-10-14 21:57:05,507 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:05,508 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912617843] [2019-10-14 21:57:05,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:05,508 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:05,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:05,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:05,843 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:05,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912617843] [2019-10-14 21:57:05,844 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043743936] [2019-10-14 21:57:05,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:05,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:05,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:06,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:06,092 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:06,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:06,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172668168] [2019-10-14 21:57:06,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:06,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:06,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:06,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:06,096 INFO L87 Difference]: Start difference. First operand 1035 states and 1359 transitions. Second operand 11 states. [2019-10-14 21:57:09,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:09,157 INFO L93 Difference]: Finished difference Result 2601 states and 3691 transitions. [2019-10-14 21:57:09,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:57:09,157 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2019-10-14 21:57:09,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:09,171 INFO L225 Difference]: With dead ends: 2601 [2019-10-14 21:57:09,172 INFO L226 Difference]: Without dead ends: 1572 [2019-10-14 21:57:09,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:57:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-10-14 21:57:09,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1240. [2019-10-14 21:57:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2019-10-14 21:57:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1602 transitions. [2019-10-14 21:57:09,254 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1602 transitions. Word has length 172 [2019-10-14 21:57:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:09,255 INFO L462 AbstractCegarLoop]: Abstraction has 1240 states and 1602 transitions. [2019-10-14 21:57:09,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:09,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1602 transitions. [2019-10-14 21:57:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 21:57:09,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:09,264 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:09,476 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:09,477 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:09,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:09,477 INFO L82 PathProgramCache]: Analyzing trace with hash 647504076, now seen corresponding path program 1 times [2019-10-14 21:57:09,478 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:09,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674223498] [2019-10-14 21:57:09,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:09,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:09,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:09,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674223498] [2019-10-14 21:57:09,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879750926] [2019-10-14 21:57:09,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:09,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:09,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:09,897 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:09,898 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:09,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:57:09,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905607923] [2019-10-14 21:57:09,899 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:57:09,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:09,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:57:09,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:57:09,900 INFO L87 Difference]: Start difference. First operand 1240 states and 1602 transitions. Second operand 11 states. [2019-10-14 21:57:12,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:12,158 INFO L93 Difference]: Finished difference Result 2466 states and 3171 transitions. [2019-10-14 21:57:12,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:57:12,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 179 [2019-10-14 21:57:12,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:12,168 INFO L225 Difference]: With dead ends: 2466 [2019-10-14 21:57:12,168 INFO L226 Difference]: Without dead ends: 1232 [2019-10-14 21:57:12,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:57:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-14 21:57:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1208. [2019-10-14 21:57:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-14 21:57:12,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1475 transitions. [2019-10-14 21:57:12,238 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1475 transitions. Word has length 179 [2019-10-14 21:57:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:12,242 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1475 transitions. [2019-10-14 21:57:12,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:57:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1475 transitions. [2019-10-14 21:57:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-14 21:57:12,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:12,246 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:12,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:12,459 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:12,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:12,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-10-14 21:57:12,459 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:12,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527947507] [2019-10-14 21:57:12,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:12,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:12,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:57:12,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527947507] [2019-10-14 21:57:12,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481324344] [2019-10-14 21:57:12,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:57:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:12,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:57:12,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:57:12,952 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:57:12,953 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 21:57:12,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919037766] [2019-10-14 21:57:12,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:12,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:57:12,955 INFO L87 Difference]: Start difference. First operand 1208 states and 1475 transitions. Second operand 5 states. [2019-10-14 21:57:14,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:14,076 INFO L93 Difference]: Finished difference Result 2583 states and 3144 transitions. [2019-10-14 21:57:14,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:14,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-14 21:57:14,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:14,084 INFO L225 Difference]: With dead ends: 2583 [2019-10-14 21:57:14,084 INFO L226 Difference]: Without dead ends: 1381 [2019-10-14 21:57:14,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:57:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2019-10-14 21:57:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1355. [2019-10-14 21:57:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1355 states. [2019-10-14 21:57:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1633 transitions. [2019-10-14 21:57:14,120 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1633 transitions. Word has length 189 [2019-10-14 21:57:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:14,121 INFO L462 AbstractCegarLoop]: Abstraction has 1355 states and 1633 transitions. [2019-10-14 21:57:14,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:14,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1633 transitions. [2019-10-14 21:57:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-10-14 21:57:14,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:14,127 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:14,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:14,331 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:14,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1807357958, now seen corresponding path program 1 times [2019-10-14 21:57:14,332 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:14,332 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404699710] [2019-10-14 21:57:14,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:14,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:14,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 84 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-14 21:57:14,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404699710] [2019-10-14 21:57:14,669 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319914607] [2019-10-14 21:57:14,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:57:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:14,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:57:14,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:57:14,889 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:14,889 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-14 21:57:14,890 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112669993] [2019-10-14 21:57:14,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:57:14,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:14,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:57:14,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:57:14,891 INFO L87 Difference]: Start difference. First operand 1355 states and 1633 transitions. Second operand 13 states. [2019-10-14 21:57:18,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:18,358 INFO L93 Difference]: Finished difference Result 4160 states and 5073 transitions. [2019-10-14 21:57:18,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:57:18,359 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 268 [2019-10-14 21:57:18,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:18,371 INFO L225 Difference]: With dead ends: 4160 [2019-10-14 21:57:18,371 INFO L226 Difference]: Without dead ends: 1780 [2019-10-14 21:57:18,376 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:57:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2019-10-14 21:57:18,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1343. [2019-10-14 21:57:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-14 21:57:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1491 transitions. [2019-10-14 21:57:18,424 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1491 transitions. Word has length 268 [2019-10-14 21:57:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:18,424 INFO L462 AbstractCegarLoop]: Abstraction has 1343 states and 1491 transitions. [2019-10-14 21:57:18,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:57:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1491 transitions. [2019-10-14 21:57:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-14 21:57:18,430 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:18,431 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:18,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:18,635 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:18,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1479931902, now seen corresponding path program 1 times [2019-10-14 21:57:18,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:18,636 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772573307] [2019-10-14 21:57:18,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:18,636 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:18,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 124 proven. 162 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:57:19,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772573307] [2019-10-14 21:57:19,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156925099] [2019-10-14 21:57:19,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:57:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:19,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:57:19,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:19,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,757 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,762 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,764 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:19,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms