/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_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:20,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:20,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:20,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:18:20,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:18:20,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:18:20,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:18:20,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:18:20,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:18:20,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:18:20,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:18:20,546 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:18:20,547 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:20,548 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:20,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:20,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:20,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:20,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:20,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:20,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:20,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:20,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:20,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:20,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:20,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:20,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:20,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:20,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:20,576 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 19:18:20,596 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:20,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:20,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:20,598 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:20,599 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:20,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:20,599 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:20,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:20,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:20,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:20,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:20,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:20,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:20,601 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:20,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:20,602 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:20,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:20,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:20,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:20,603 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:20,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:20,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:20,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:20,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:20,604 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:20,604 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:20,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:20,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:20,605 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:20,876 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:20,888 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:20,892 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:20,893 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:20,893 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:20,894 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-06 19:18:20,965 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13cd8db56/c3e09aa5f6f5495783c77cec04afa272/FLAG949655fcc [2019-11-06 19:18:21,596 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:21,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-11-06 19:18:21,619 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13cd8db56/c3e09aa5f6f5495783c77cec04afa272/FLAG949655fcc [2019-11-06 19:18:21,771 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13cd8db56/c3e09aa5f6f5495783c77cec04afa272 [2019-11-06 19:18:21,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:21,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:21,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:21,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:21,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:21,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19891321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:21, skipping insertion in model container [2019-11-06 19:18:21,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:21" (1/1) ... [2019-11-06 19:18:21,798 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:21,874 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:22,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:22,864 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:23,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:23,097 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:23,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23 WrapperNode [2019-11-06 19:18:23,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:23,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:23,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:23,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:23,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (1/1) ... [2019-11-06 19:18:23,301 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:23,302 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:23,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:23,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:23,303 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (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 19:18:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:23,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:23,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:23,393 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:23,393 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:23,394 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:23,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:23,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:25,860 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:25,861 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:25,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:25 BoogieIcfgContainer [2019-11-06 19:18:25,863 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:25,864 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:25,864 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:25,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:25,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:21" (1/3) ... [2019-11-06 19:18:25,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7344c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:25, skipping insertion in model container [2019-11-06 19:18:25,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:23" (2/3) ... [2019-11-06 19:18:25,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7344c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:25, skipping insertion in model container [2019-11-06 19:18:25,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:25" (3/3) ... [2019-11-06 19:18:25,871 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-11-06 19:18:25,882 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:25,891 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:25,904 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:25,936 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:25,936 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:25,936 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:25,936 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:25,936 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:25,937 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:25,937 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:25,937 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:25,979 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:25,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 19:18:25,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:25,988 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] [2019-11-06 19:18:25,990 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1472830021, now seen corresponding path program 1 times [2019-11-06 19:18:26,005 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:26,006 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849718511] [2019-11-06 19:18:26,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:26,422 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 19:18:26,423 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849718511] [2019-11-06 19:18:26,424 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:26,424 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:26,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857746107] [2019-11-06 19:18:26,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:26,431 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:26,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:26,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:26,448 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:31,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:31,627 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-11-06 19:18:31,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:31,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-11-06 19:18:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:31,664 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:31,666 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:31,680 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 19:18:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-11-06 19:18:31,836 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 40 [2019-11-06 19:18:31,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:31,838 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-11-06 19:18:31,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:31,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-11-06 19:18:31,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 19:18:31,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:31,854 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:31,854 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:31,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:31,855 INFO L82 PathProgramCache]: Analyzing trace with hash -111411403, now seen corresponding path program 1 times [2019-11-06 19:18:31,855 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:31,855 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301534724] [2019-11-06 19:18:31,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:32,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:32,332 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301534724] [2019-11-06 19:18:32,332 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:32,332 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:18:32,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472034983] [2019-11-06 19:18:32,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:18:32,336 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:32,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:18:32,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:32,337 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-11-06 19:18:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:36,612 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-11-06 19:18:36,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:18:36,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-11-06 19:18:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:36,640 INFO L225 Difference]: With dead ends: 3125 [2019-11-06 19:18:36,641 INFO L226 Difference]: Without dead ends: 2100 [2019-11-06 19:18:36,647 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:36,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-11-06 19:18:36,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-11-06 19:18:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-11-06 19:18:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-11-06 19:18:36,768 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 175 [2019-11-06 19:18:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:36,772 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-11-06 19:18:36,773 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:18:36,773 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-11-06 19:18:36,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-11-06 19:18:36,788 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:36,789 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, 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] [2019-11-06 19:18:36,789 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:36,791 INFO L82 PathProgramCache]: Analyzing trace with hash 15236199, now seen corresponding path program 1 times [2019-11-06 19:18:36,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:36,791 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559508303] [2019-11-06 19:18:36,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:36,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:37,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559508303] [2019-11-06 19:18:37,149 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431287729] [2019-11-06 19:18:37,149 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 19:18:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:37,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:37,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:37,429 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 19:18:37,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:37,435 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:37,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358329578] [2019-11-06 19:18:37,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:37,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:37,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:37,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:37,440 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-11-06 19:18:40,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:40,155 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-11-06 19:18:40,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:40,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-11-06 19:18:40,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:40,174 INFO L225 Difference]: With dead ends: 5192 [2019-11-06 19:18:40,174 INFO L226 Difference]: Without dead ends: 3129 [2019-11-06 19:18:40,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 210 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 19:18:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-11-06 19:18:40,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-11-06 19:18:40,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-11-06 19:18:40,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-11-06 19:18:40,266 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 210 [2019-11-06 19:18:40,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:40,266 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-11-06 19:18:40,266 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:40,267 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-11-06 19:18:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-11-06 19:18:40,272 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:40,273 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:40,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:40,485 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1930172117, now seen corresponding path program 1 times [2019-11-06 19:18:40,485 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:40,485 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959623212] [2019-11-06 19:18:40,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 172 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:18:40,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959623212] [2019-11-06 19:18:40,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086122427] [2019-11-06 19:18:40,893 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 19:18:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:41,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:41,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 19:18:41,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:41,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:41,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708098683] [2019-11-06 19:18:41,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:41,117 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:41,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:41,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:41,118 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-11-06 19:18:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:49,178 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-11-06 19:18:49,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:18:49,183 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 319 [2019-11-06 19:18:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:49,221 INFO L225 Difference]: With dead ends: 10419 [2019-11-06 19:18:49,221 INFO L226 Difference]: Without dead ends: 6317 [2019-11-06 19:18:49,233 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:18:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-11-06 19:18:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-11-06 19:18:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-11-06 19:18:49,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7568 transitions. [2019-11-06 19:18:49,402 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7568 transitions. Word has length 319 [2019-11-06 19:18:49,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:49,404 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7568 transitions. [2019-11-06 19:18:49,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7568 transitions. [2019-11-06 19:18:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2019-11-06 19:18:49,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:49,423 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:18:49,631 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:49,631 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:49,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:49,632 INFO L82 PathProgramCache]: Analyzing trace with hash 978718812, now seen corresponding path program 1 times [2019-11-06 19:18:49,632 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:49,632 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937485963] [2019-11-06 19:18:49,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 191 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:18:50,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937485963] [2019-11-06 19:18:50,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275186514] [2019-11-06 19:18:50,542 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 19:18:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:50,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:50,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 361 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-06 19:18:50,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:50,892 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:50,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510539727] [2019-11-06 19:18:50,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:50,893 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:50,894 INFO L87 Difference]: Start difference. First operand 5938 states and 7568 transitions. Second operand 11 states. [2019-11-06 19:18:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:56,602 INFO L93 Difference]: Finished difference Result 13329 states and 17710 transitions. [2019-11-06 19:18:56,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:18:56,603 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 520 [2019-11-06 19:18:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:56,637 INFO L225 Difference]: With dead ends: 13329 [2019-11-06 19:18:56,638 INFO L226 Difference]: Without dead ends: 7009 [2019-11-06 19:18:56,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:18:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2019-11-06 19:18:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6971. [2019-11-06 19:18:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2019-11-06 19:18:56,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 7945 transitions. [2019-11-06 19:18:56,917 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 7945 transitions. Word has length 520 [2019-11-06 19:18:56,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:56,918 INFO L462 AbstractCegarLoop]: Abstraction has 6971 states and 7945 transitions. [2019-11-06 19:18:56,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:18:56,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 7945 transitions. [2019-11-06 19:18:56,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2019-11-06 19:18:56,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:56,965 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2019-11-06 19:18:57,169 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:57,170 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:57,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:57,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1742697075, now seen corresponding path program 1 times [2019-11-06 19:18:57,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:57,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005646968] [2019-11-06 19:18:57,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 311 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-11-06 19:18:58,477 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005646968] [2019-11-06 19:18:58,478 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383865289] [2019-11-06 19:18:58,478 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 19:18:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:58,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:58,717 INFO L279 TraceCheckSpWp]: Computing forward predicates...