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/Problem15_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:25,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:25,462 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:25,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:03:25,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:25,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:25,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:25,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:25,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:25,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:25,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:25,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:25,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:25,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:25,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:25,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:25,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:25,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:25,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:25,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:25,538 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 22:03:25,556 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:25,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:25,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:25,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:25,559 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:25,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:25,560 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:25,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:25,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:25,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:25,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:25,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:25,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:25,562 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:25,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:25,563 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:25,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:25,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:25,563 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:25,563 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:25,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:25,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:25,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:25,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:25,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:25,565 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:25,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:25,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:25,565 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:25,873 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:25,887 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:25,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:25,892 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:25,892 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:25,893 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-14 22:03:25,952 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45dbca15/d065325a2bf24704829610833c388435/FLAGf75e1a256 [2019-10-14 22:03:26,619 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:26,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label53.c [2019-10-14 22:03:26,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45dbca15/d065325a2bf24704829610833c388435/FLAGf75e1a256 [2019-10-14 22:03:26,794 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45dbca15/d065325a2bf24704829610833c388435 [2019-10-14 22:03:26,804 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:26,805 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:26,806 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:26,806 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:26,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:26,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:26" (1/1) ... [2019-10-14 22:03:26,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75d79651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:26, skipping insertion in model container [2019-10-14 22:03:26,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:26" (1/1) ... [2019-10-14 22:03:26,823 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:26,914 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:27,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:27,710 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:28,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:28,049 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:28,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28 WrapperNode [2019-10-14 22:03:28,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:28,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:28,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:28,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:28,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (1/1) ... [2019-10-14 22:03:28,288 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:28,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:28,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:28,289 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:28,290 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (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 22:03:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:28,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:28,365 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:28,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:28,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:31,578 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:31,579 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:31,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:31 BoogieIcfgContainer [2019-10-14 22:03:31,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:31,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:31,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:31,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:31,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:26" (1/3) ... [2019-10-14 22:03:31,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555c9605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:31, skipping insertion in model container [2019-10-14 22:03:31,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:28" (2/3) ... [2019-10-14 22:03:31,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555c9605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:31, skipping insertion in model container [2019-10-14 22:03:31,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:31" (3/3) ... [2019-10-14 22:03:31,611 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2019-10-14 22:03:31,629 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:31,646 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:31,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:31,727 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:31,727 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:31,727 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:31,728 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:31,728 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:31,728 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:31,728 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:31,729 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:03:31,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-14 22:03:31,789 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:31,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:31,792 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:31,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1056547171, now seen corresponding path program 1 times [2019-10-14 22:03:31,811 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:31,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940637727] [2019-10-14 22:03:31,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:31,812 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:31,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:32,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:32,307 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 22:03:32,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940637727] [2019-10-14 22:03:32,310 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:32,311 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:32,311 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183016157] [2019-10-14 22:03:32,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:32,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:32,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:32,342 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:39,060 INFO L93 Difference]: Finished difference Result 1568 states and 2863 transitions. [2019-10-14 22:03:39,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:39,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2019-10-14 22:03:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:39,096 INFO L225 Difference]: With dead ends: 1568 [2019-10-14 22:03:39,097 INFO L226 Difference]: Without dead ends: 1048 [2019-10-14 22:03:39,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2019-10-14 22:03:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1025. [2019-10-14 22:03:39,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1025 states. [2019-10-14 22:03:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 1590 transitions. [2019-10-14 22:03:39,252 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 1590 transitions. Word has length 53 [2019-10-14 22:03:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:39,254 INFO L462 AbstractCegarLoop]: Abstraction has 1025 states and 1590 transitions. [2019-10-14 22:03:39,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 1590 transitions. [2019-10-14 22:03:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:03:39,270 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:39,270 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:03:39,271 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -602725951, now seen corresponding path program 1 times [2019-10-14 22:03:39,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:39,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656903565] [2019-10-14 22:03:39,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:39,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:39,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:39,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656903565] [2019-10-14 22:03:39,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:39,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:03:39,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013091973] [2019-10-14 22:03:39,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:39,734 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:39,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:39,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:39,735 INFO L87 Difference]: Start difference. First operand 1025 states and 1590 transitions. Second operand 8 states. [2019-10-14 22:03:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:45,062 INFO L93 Difference]: Finished difference Result 3048 states and 4814 transitions. [2019-10-14 22:03:45,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:45,064 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 125 [2019-10-14 22:03:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:45,080 INFO L225 Difference]: With dead ends: 3048 [2019-10-14 22:03:45,081 INFO L226 Difference]: Without dead ends: 2029 [2019-10-14 22:03:45,085 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2019-10-14 22:03:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1671. [2019-10-14 22:03:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1671 states. [2019-10-14 22:03:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2347 transitions. [2019-10-14 22:03:45,168 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2347 transitions. Word has length 125 [2019-10-14 22:03:45,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:45,171 INFO L462 AbstractCegarLoop]: Abstraction has 1671 states and 2347 transitions. [2019-10-14 22:03:45,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:45,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2347 transitions. [2019-10-14 22:03:45,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 22:03:45,179 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:45,180 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:03:45,180 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:45,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:45,182 INFO L82 PathProgramCache]: Analyzing trace with hash 741212625, now seen corresponding path program 1 times [2019-10-14 22:03:45,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:45,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854705060] [2019-10-14 22:03:45,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:45,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:45,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 45 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:45,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854705060] [2019-10-14 22:03:45,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100568401] [2019-10-14 22:03:45,484 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 22:03:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:45,568 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 22:03:45,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:45,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:45,746 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:45,747 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:45,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 22:03:45,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766087959] [2019-10-14 22:03:45,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:45,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:45,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:45,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:45,749 INFO L87 Difference]: Start difference. First operand 1671 states and 2347 transitions. Second operand 5 states. [2019-10-14 22:03:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:49,884 INFO L93 Difference]: Finished difference Result 3683 states and 5100 transitions. [2019-10-14 22:03:49,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:49,892 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-14 22:03:49,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:49,902 INFO L225 Difference]: With dead ends: 3683 [2019-10-14 22:03:49,903 INFO L226 Difference]: Without dead ends: 2018 [2019-10-14 22:03:49,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:49,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2019-10-14 22:03:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1985. [2019-10-14 22:03:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1985 states. [2019-10-14 22:03:49,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1985 states to 1985 states and 2671 transitions. [2019-10-14 22:03:49,963 INFO L78 Accepts]: Start accepts. Automaton has 1985 states and 2671 transitions. Word has length 133 [2019-10-14 22:03:49,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:49,964 INFO L462 AbstractCegarLoop]: Abstraction has 1985 states and 2671 transitions. [2019-10-14 22:03:49,964 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:49,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1985 states and 2671 transitions. [2019-10-14 22:03:49,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-14 22:03:49,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:49,968 INFO L380 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, 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, 1, 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 22:03:50,172 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:50,173 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1574000176, now seen corresponding path program 1 times [2019-10-14 22:03:50,173 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:50,173 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349429451] [2019-10-14 22:03:50,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,174 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:50,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:51,321 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 154 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:03:51,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349429451] [2019-10-14 22:03:51,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099250035] [2019-10-14 22:03:51,322 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 22:03:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:51,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 22:03:51,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:51,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:51,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 146 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:51,684 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:51,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2019-10-14 22:03:51,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344612255] [2019-10-14 22:03:51,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 22:03:51,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 22:03:51,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:03:51,688 INFO L87 Difference]: Start difference. First operand 1985 states and 2671 transitions. Second operand 21 states. [2019-10-14 22:03:54,925 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2019-10-14 22:03:55,559 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2019-10-14 22:03:56,703 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2019-10-14 22:03:58,387 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34