/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:41,019 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:41,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:41,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:17:41,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:41,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:41,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:41,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:41,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:41,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:41,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:41,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:41,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:41,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:41,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:41,087 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:41,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:17:41,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:41,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:41,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:41,101 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 [2019-11-06 19:17:41,132 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:41,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:41,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:41,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:41,139 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:41,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:41,139 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:41,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:41,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:41,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:41,141 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:41,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:41,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:41,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:41,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:41,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:41,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:41,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:41,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:41,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:41,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:41,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:41,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:41,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:41,436 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:41,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:41,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:41,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:41,454 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:41,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-11-06 19:17:41,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b515427/7e4fcaa9d9ee439999b91da693bb4516/FLAG85132524f [2019-11-06 19:17:42,189 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:42,190 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-11-06 19:17:42,209 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b515427/7e4fcaa9d9ee439999b91da693bb4516/FLAG85132524f [2019-11-06 19:17:42,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64b515427/7e4fcaa9d9ee439999b91da693bb4516 [2019-11-06 19:17:42,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:42,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:42,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:42,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:42,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:42,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36629faa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:42, skipping insertion in model container [2019-11-06 19:17:42,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:42" (1/1) ... [2019-11-06 19:17:42,383 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:42,444 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:43,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:43,249 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:43,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:43,738 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:43,739 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43 WrapperNode [2019-11-06 19:17:43,739 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:43,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:43,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:43,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:43,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,871 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (1/1) ... [2019-11-06 19:17:43,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:43,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:43,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:43,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:43,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (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 [2019-11-06 19:17:44,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:44,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:44,030 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:44,031 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:44,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:46,578 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:46,578 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:46,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:46 BoogieIcfgContainer [2019-11-06 19:17:46,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:46,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:46,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:46,585 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:46,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:42" (1/3) ... [2019-11-06 19:17:46,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:46, skipping insertion in model container [2019-11-06 19:17:46,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:43" (2/3) ... [2019-11-06 19:17:46,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65bee5a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:46, skipping insertion in model container [2019-11-06 19:17:46,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:46" (3/3) ... [2019-11-06 19:17:46,589 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2019-11-06 19:17:46,599 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:46,607 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:46,619 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:46,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:46,651 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:46,651 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:46,651 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:46,651 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:46,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:46,651 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:46,652 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:46,680 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 19:17:46,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:46,689 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:46,691 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:46,698 INFO L82 PathProgramCache]: Analyzing trace with hash -782110827, now seen corresponding path program 1 times [2019-11-06 19:17:46,709 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:46,709 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820002822] [2019-11-06 19:17:46,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:47,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820002822] [2019-11-06 19:17:47,138 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:47,138 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:47,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506675780] [2019-11-06 19:17:47,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:47,145 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:47,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:47,164 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:52,449 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:17:52,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:52,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-11-06 19:17:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:52,474 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:52,474 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:52,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:52,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:52,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:17:52,599 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 44 [2019-11-06 19:17:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:52,600 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:17:52,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:17:52,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-11-06 19:17:52,611 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:52,612 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:52,612 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:52,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:52,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1818262613, now seen corresponding path program 1 times [2019-11-06 19:17:52,613 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:52,613 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198993893] [2019-11-06 19:17:52,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:52,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 74 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:17:53,141 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198993893] [2019-11-06 19:17:53,142 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780109564] [2019-11-06 19:17:53,142 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 [2019-11-06 19:17:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:53,283 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:17:53,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 19:17:53,423 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:53,424 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:17:53,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591085480] [2019-11-06 19:17:53,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:53,430 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:53,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:17:53,431 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:17:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:56,635 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-11-06 19:17:56,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:17:56,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-11-06 19:17:56,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:56,650 INFO L225 Difference]: With dead ends: 3129 [2019-11-06 19:17:56,650 INFO L226 Difference]: Without dead ends: 2104 [2019-11-06 19:17:56,662 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:17:56,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-11-06 19:17:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-11-06 19:17:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:17:56,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-11-06 19:17:56,729 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 226 [2019-11-06 19:17:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:56,730 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-11-06 19:17:56,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-11-06 19:17:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-11-06 19:17:56,740 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:56,740 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-11-06 19:17:56,945 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:17:56,946 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1261652084, now seen corresponding path program 1 times [2019-11-06 19:17:56,947 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:56,948 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771565548] [2019-11-06 19:17:56,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:57,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 74 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:17:57,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771565548] [2019-11-06 19:17:57,385 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891845663] [2019-11-06 19:17:57,385 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 [2019-11-06 19:17:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:57,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:17:57,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:17:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 19:17:57,555 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:17:57,555 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:17:57,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129517190] [2019-11-06 19:17:57,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:57,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:17:57,557 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-11-06 19:18:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:00,600 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-11-06 19:18:00,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:00,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2019-11-06 19:18:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:00,625 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:00,625 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:00,632 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-11-06 19:18:00,746 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 261 [2019-11-06 19:18:00,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:00,746 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-11-06 19:18:00,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-11-06 19:18:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-06 19:18:00,752 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:00,753 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-11-06 19:18:00,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:00,957 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:00,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1804095668, now seen corresponding path program 1 times [2019-11-06 19:18:00,958 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:00,958 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320669207] [2019-11-06 19:18:00,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:01,517 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320669207] [2019-11-06 19:18:01,518 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640202115] [2019-11-06 19:18:01,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:01,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:01,645 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:01,759 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:01,759 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:01,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497685624] [2019-11-06 19:18:01,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:01,761 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:01,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:01,762 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-11-06 19:18:09,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:09,136 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-11-06 19:18:09,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:09,137 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 273 [2019-11-06 19:18:09,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:09,175 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:09,175 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:09,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 281 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:09,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:09,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6238. [2019-11-06 19:18:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6238 states. [2019-11-06 19:18:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6238 states to 6238 states and 7140 transitions. [2019-11-06 19:18:09,355 INFO L78 Accepts]: Start accepts. Automaton has 6238 states and 7140 transitions. Word has length 273 [2019-11-06 19:18:09,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:09,356 INFO L462 AbstractCegarLoop]: Abstraction has 6238 states and 7140 transitions. [2019-11-06 19:18:09,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 6238 states and 7140 transitions. [2019-11-06 19:18:09,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-11-06 19:18:09,368 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:09,369 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 19:18:09,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:09,574 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:09,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2134090324, now seen corresponding path program 1 times [2019-11-06 19:18:09,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:09,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325881332] [2019-11-06 19:18:09,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 148 proven. 293 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2019-11-06 19:18:10,315 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325881332] [2019-11-06 19:18:10,316 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259841814] [2019-11-06 19:18:10,316 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 [2019-11-06 19:18:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:10,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:10,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2019-11-06 19:18:10,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:10,939 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:10,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894333536] [2019-11-06 19:18:10,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:10,940 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:10,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:10,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:10,941 INFO L87 Difference]: Start difference. First operand 6238 states and 7140 transitions. Second operand 5 states. [2019-11-06 19:18:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:12,704 INFO L93 Difference]: Finished difference Result 13848 states and 15883 transitions. [2019-11-06 19:18:12,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:12,706 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 487 [2019-11-06 19:18:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:12,738 INFO L225 Difference]: With dead ends: 13848 [2019-11-06 19:18:12,738 INFO L226 Difference]: Without dead ends: 7616 [2019-11-06 19:18:12,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:12,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-11-06 19:18:12,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7600. [2019-11-06 19:18:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7600 states. [2019-11-06 19:18:12,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7600 states to 7600 states and 8425 transitions. [2019-11-06 19:18:12,928 INFO L78 Accepts]: Start accepts. Automaton has 7600 states and 8425 transitions. Word has length 487 [2019-11-06 19:18:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:12,928 INFO L462 AbstractCegarLoop]: Abstraction has 7600 states and 8425 transitions. [2019-11-06 19:18:12,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 7600 states and 8425 transitions. [2019-11-06 19:18:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2019-11-06 19:18:12,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:12,950 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:13,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:13,155 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:13,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:13,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1663829424, now seen corresponding path program 1 times [2019-11-06 19:18:13,156 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:13,156 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959921014] [2019-11-06 19:18:13,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:13,888 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 268 proven. 189 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2019-11-06 19:18:13,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959921014] [2019-11-06 19:18:13,889 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536230788] [2019-11-06 19:18:13,889 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 [2019-11-06 19:18:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:14,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:14,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 732 backedges. 571 proven. 2 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2019-11-06 19:18:14,480 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:14,481 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:14,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112217560] [2019-11-06 19:18:14,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:14,483 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:14,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:14,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:14,483 INFO L87 Difference]: Start difference. First operand 7600 states and 8425 transitions. Second operand 11 states.