/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/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:11:48,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:11:48,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:11:48,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:11:48,442 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:11:48,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:11:48,446 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:11:48,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:11:48,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:11:48,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:11:48,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:11:48,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:11:48,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:11:48,460 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:11:48,461 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:11:48,462 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:11:48,463 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:11:48,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:11:48,465 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:11:48,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:11:48,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:11:48,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:11:48,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:11:48,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:11:48,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:11:48,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:11:48,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:11:48,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:11:48,482 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 19:11:48,495 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:11:48,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:11:48,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:11:48,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:11:48,497 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:11:48,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:11:48,498 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:11:48,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:11:48,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:11:48,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:11:48,499 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:11:48,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:11:48,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:11:48,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:11:48,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:11:48,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:11:48,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:11:48,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:11:48,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:11:48,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:11:48,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:11:48,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:11:48,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:11:48,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:11:48,761 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:11:48,772 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:11:48,776 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:11:48,777 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:11:48,778 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:11:48,779 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-06 19:11:48,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e1504ba/03be2097b080414cb8c75c1baf7432ed/FLAG0ffbd5e9b [2019-11-06 19:11:49,626 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:11:49,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-06 19:11:49,657 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e1504ba/03be2097b080414cb8c75c1baf7432ed/FLAG0ffbd5e9b [2019-11-06 19:11:49,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1e1504ba/03be2097b080414cb8c75c1baf7432ed [2019-11-06 19:11:49,766 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:11:49,768 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:11:49,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:11:49,770 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:11:49,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:11:49,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:49" (1/1) ... [2019-11-06 19:11:49,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716597c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:49, skipping insertion in model container [2019-11-06 19:11:49,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:11:49" (1/1) ... [2019-11-06 19:11:49,788 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:11:49,948 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:11:51,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:11:51,525 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:11:52,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:11:52,225 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:11:52,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52 WrapperNode [2019-11-06 19:11:52,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:11:52,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:11:52,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:11:52,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:11:52,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,299 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,425 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (1/1) ... [2019-11-06 19:11:52,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:11:52,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:11:52,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:11:52,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:11:52,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (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 19:11:52,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:11:52,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:11:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:11:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:11:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:11:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 19:11:52,600 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:11:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:11:52,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:11:52,602 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:11:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 19:11:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:11:52,603 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:11:52,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:11:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:11:52,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:11:52,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:11:57,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:11:57,485 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:11:57,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:57 BoogieIcfgContainer [2019-11-06 19:11:57,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:11:57,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:11:57,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:11:57,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:11:57,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:11:49" (1/3) ... [2019-11-06 19:11:57,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4805d029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:57, skipping insertion in model container [2019-11-06 19:11:57,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:11:52" (2/3) ... [2019-11-06 19:11:57,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4805d029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:11:57, skipping insertion in model container [2019-11-06 19:11:57,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:11:57" (3/3) ... [2019-11-06 19:11:57,504 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2019-11-06 19:11:57,514 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:11:57,523 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:11:57,534 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:11:57,573 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:11:57,573 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:11:57,573 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:11:57,573 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:11:57,573 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:11:57,573 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:11:57,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:11:57,574 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:11:57,616 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 19:11:57,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 19:11:57,622 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:57,623 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] [2019-11-06 19:11:57,625 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:57,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:57,631 INFO L82 PathProgramCache]: Analyzing trace with hash -830521731, now seen corresponding path program 1 times [2019-11-06 19:11:57,640 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:57,640 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049493315] [2019-11-06 19:11:57,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:57,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:57,938 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 19:11:57,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049493315] [2019-11-06 19:11:57,940 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:11:57,941 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:11:57,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004691242] [2019-11-06 19:11:57,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:11:57,949 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:11:57,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:11:57,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:11:57,970 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-11-06 19:12:06,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:06,630 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-11-06 19:12:06,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 19:12:06,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-06 19:12:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:06,664 INFO L225 Difference]: With dead ends: 2471 [2019-11-06 19:12:06,664 INFO L226 Difference]: Without dead ends: 1568 [2019-11-06 19:12:06,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:12:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-11-06 19:12:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-11-06 19:12:06,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-11-06 19:12:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2863 transitions. [2019-11-06 19:12:06,896 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2863 transitions. Word has length 24 [2019-11-06 19:12:06,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:06,897 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2863 transitions. [2019-11-06 19:12:06,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:06,898 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2863 transitions. [2019-11-06 19:12:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 19:12:06,911 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:06,913 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:12:06,913 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:06,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2086118223, now seen corresponding path program 1 times [2019-11-06 19:12:06,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:06,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035482044] [2019-11-06 19:12:06,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:07,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:07,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035482044] [2019-11-06 19:12:07,332 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:07,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:12:07,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396826484] [2019-11-06 19:12:07,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:12:07,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:07,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:12:07,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:07,339 INFO L87 Difference]: Start difference. First operand 1553 states and 2863 transitions. Second operand 7 states. [2019-11-06 19:12:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:17,288 INFO L93 Difference]: Finished difference Result 4757 states and 8776 transitions. [2019-11-06 19:12:17,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:12:17,289 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2019-11-06 19:12:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:17,312 INFO L225 Difference]: With dead ends: 4757 [2019-11-06 19:12:17,313 INFO L226 Difference]: Without dead ends: 3210 [2019-11-06 19:12:17,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:12:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2019-11-06 19:12:17,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 3139. [2019-11-06 19:12:17,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3139 states. [2019-11-06 19:12:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3139 states to 3139 states and 5141 transitions. [2019-11-06 19:12:17,424 INFO L78 Accepts]: Start accepts. Automaton has 3139 states and 5141 transitions. Word has length 93 [2019-11-06 19:12:17,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:17,424 INFO L462 AbstractCegarLoop]: Abstraction has 3139 states and 5141 transitions. [2019-11-06 19:12:17,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:12:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3139 states and 5141 transitions. [2019-11-06 19:12:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 19:12:17,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:17,427 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:12:17,427 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1697930939, now seen corresponding path program 1 times [2019-11-06 19:12:17,428 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:17,428 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406848282] [2019-11-06 19:12:17,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:17,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406848282] [2019-11-06 19:12:17,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799250809] [2019-11-06 19:12:17,614 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 19:12:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:17,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:12:17,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:12:17,819 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:17,820 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2019-11-06 19:12:17,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525182255] [2019-11-06 19:12:17,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 19:12:17,822 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 19:12:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:12:17,823 INFO L87 Difference]: Start difference. First operand 3139 states and 5141 transitions. Second operand 10 states.