/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/Problem11_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:10:25,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:10:25,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:10:25,486 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:10:25,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:10:25,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:10:25,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:10:25,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:10:25,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:10:25,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:10:25,495 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:10:25,496 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:10:25,496 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:10:25,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:10:25,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:10:25,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:10:25,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:10:25,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:10:25,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:10:25,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:10:25,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:10:25,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:10:25,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:10:25,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:10:25,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:10:25,521 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:10:25,522 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:10:25,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:10:25,523 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 19:10:25,538 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:10:25,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:10:25,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:10:25,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:10:25,540 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:10:25,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:10:25,540 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:10:25,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:10:25,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:10:25,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:10:25,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:10:25,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:10:25,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:10:25,542 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:10:25,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:10:25,542 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:10:25,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:10:25,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:10:25,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:10:25,544 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:10:25,544 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:10:25,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:10:25,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:10:25,545 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:10:25,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:10:25,545 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:10:25,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:10:25,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:10:25,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:10:25,821 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:10:25,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:10:25,842 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:10:25,843 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:10:25,843 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:10:25,844 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-06 19:10:25,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4024f1226/938c8bab2a764efa9ff575b03d9c5bf1/FLAG5aca24034 [2019-11-06 19:10:26,585 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:10:26,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-11-06 19:10:26,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4024f1226/938c8bab2a764efa9ff575b03d9c5bf1/FLAG5aca24034 [2019-11-06 19:10:26,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4024f1226/938c8bab2a764efa9ff575b03d9c5bf1 [2019-11-06 19:10:26,880 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:10:26,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:10:26,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:26,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:10:26,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:10:26,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:26" (1/1) ... [2019-11-06 19:10:26,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311c2a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:26, skipping insertion in model container [2019-11-06 19:10:26,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:10:26" (1/1) ... [2019-11-06 19:10:26,928 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:10:27,028 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:10:27,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:27,934 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:10:28,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:10:28,117 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:10:28,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28 WrapperNode [2019-11-06 19:10:28,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:10:28,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:10:28,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:10:28,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:10:28,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (1/1) ... [2019-11-06 19:10:28,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:10:28,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:10:28,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:10:28,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:10:28,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (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 [2019-11-06 19:10:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:10:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:10:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:10:28,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:10:28,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:10:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:10:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:10:28,384 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:10:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:10:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:10:28,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:10:30,491 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:10:30,491 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:10:30,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:30 BoogieIcfgContainer [2019-11-06 19:10:30,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:10:30,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:10:30,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:10:30,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:10:30,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:10:26" (1/3) ... [2019-11-06 19:10:30,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd52ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:30, skipping insertion in model container [2019-11-06 19:10:30,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:10:28" (2/3) ... [2019-11-06 19:10:30,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd52ebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:10:30, skipping insertion in model container [2019-11-06 19:10:30,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:10:30" (3/3) ... [2019-11-06 19:10:30,513 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-11-06 19:10:30,525 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:10:30,535 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:10:30,548 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:10:30,591 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:10:30,592 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:10:30,593 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:10:30,593 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:10:30,594 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:10:30,594 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:10:30,594 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:10:30,594 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:10:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:10:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 19:10:30,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:30,659 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:10:30,661 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-11-06 19:10:30,678 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:30,678 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212893470] [2019-11-06 19:10:30,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:31,139 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 19:10:31,139 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212893470] [2019-11-06 19:10:31,140 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:31,140 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:10:31,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929755051] [2019-11-06 19:10:31,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:31,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:31,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:31,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:10:31,165 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:10:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:34,722 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-11-06 19:10:34,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:10:34,723 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-11-06 19:10:34,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:34,744 INFO L225 Difference]: With dead ends: 987 [2019-11-06 19:10:34,745 INFO L226 Difference]: Without dead ends: 626 [2019-11-06 19:10:34,754 INFO L630 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 [2019-11-06 19:10:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-11-06 19:10:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-11-06 19:10:34,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-11-06 19:10:34,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-11-06 19:10:34,870 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 51 [2019-11-06 19:10:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:34,871 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-11-06 19:10:34,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-11-06 19:10:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-06 19:10:34,882 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:34,883 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, 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] [2019-11-06 19:10:34,883 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:34,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:34,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-11-06 19:10:34,886 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:34,887 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639774741] [2019-11-06 19:10:34,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:35,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639774741] [2019-11-06 19:10:35,248 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:10:35,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:10:35,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314107293] [2019-11-06 19:10:35,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:10:35,252 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:35,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:10:35,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:10:35,253 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-11-06 19:10:38,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:38,324 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-11-06 19:10:38,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:10:38,325 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-11-06 19:10:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:38,333 INFO L225 Difference]: With dead ends: 1652 [2019-11-06 19:10:38,333 INFO L226 Difference]: Without dead ends: 1232 [2019-11-06 19:10:38,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:10:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-11-06 19:10:38,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-11-06 19:10:38,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-11-06 19:10:38,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1684 transitions. [2019-11-06 19:10:38,391 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1684 transitions. Word has length 123 [2019-11-06 19:10:38,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:38,392 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1684 transitions. [2019-11-06 19:10:38,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:10:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1684 transitions. [2019-11-06 19:10:38,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 19:10:38,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:38,396 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, 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] [2019-11-06 19:10:38,397 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-11-06 19:10:38,397 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:38,397 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952267038] [2019-11-06 19:10:38,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:38,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:38,567 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:38,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952267038] [2019-11-06 19:10:38,568 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852945165] [2019-11-06 19:10:38,568 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 19:10:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:38,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:38,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:38,768 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:38,768 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:10:38,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711386178] [2019-11-06 19:10:38,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:38,769 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:38,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:38,770 INFO L87 Difference]: Start difference. First operand 1203 states and 1684 transitions. Second operand 3 states. [2019-11-06 19:10:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:39,744 INFO L93 Difference]: Finished difference Result 2796 states and 3920 transitions. [2019-11-06 19:10:39,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:39,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-11-06 19:10:39,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:39,756 INFO L225 Difference]: With dead ends: 2796 [2019-11-06 19:10:39,756 INFO L226 Difference]: Without dead ends: 1599 [2019-11-06 19:10:39,761 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:39,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-11-06 19:10:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-11-06 19:10:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-11-06 19:10:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2180 transitions. [2019-11-06 19:10:39,832 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2180 transitions. Word has length 124 [2019-11-06 19:10:39,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:39,833 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2180 transitions. [2019-11-06 19:10:39,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:39,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2180 transitions. [2019-11-06 19:10:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:10:39,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:39,838 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, 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] [2019-11-06 19:10:40,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:40,042 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:40,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:40,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1691608690, now seen corresponding path program 1 times [2019-11-06 19:10:40,044 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:40,044 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793485930] [2019-11-06 19:10:40,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:40,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793485930] [2019-11-06 19:10:40,244 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970316681] [2019-11-06 19:10:40,244 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 19:10:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:40,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:10:40,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:40,396 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:40,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:10:40,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935629894] [2019-11-06 19:10:40,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:10:40,403 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:40,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:10:40,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:40,404 INFO L87 Difference]: Start difference. First operand 1589 states and 2180 transitions. Second operand 3 states. [2019-11-06 19:10:41,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:41,405 INFO L93 Difference]: Finished difference Result 3182 states and 4394 transitions. [2019-11-06 19:10:41,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:10:41,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 19:10:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:41,416 INFO L225 Difference]: With dead ends: 3182 [2019-11-06 19:10:41,416 INFO L226 Difference]: Without dead ends: 1599 [2019-11-06 19:10:41,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:10:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-11-06 19:10:41,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-11-06 19:10:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-11-06 19:10:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2140 transitions. [2019-11-06 19:10:41,470 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2140 transitions. Word has length 125 [2019-11-06 19:10:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:41,471 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2140 transitions. [2019-11-06 19:10:41,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:10:41,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2140 transitions. [2019-11-06 19:10:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-11-06 19:10:41,474 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:41,474 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, 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] [2019-11-06 19:10:41,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:41,687 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:41,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:41,687 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-11-06 19:10:41,688 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:41,688 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958938692] [2019-11-06 19:10:41,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:41,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:42,061 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:42,061 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958938692] [2019-11-06 19:10:42,062 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704214267] [2019-11-06 19:10:42,062 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 19:10:42,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:42,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:10:42,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:42,207 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:10:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:10:42,275 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:10:42,275 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-11-06 19:10:42,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432814997] [2019-11-06 19:10:42,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:10:42,277 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:42,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:10:42,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:10:42,277 INFO L87 Difference]: Start difference. First operand 1589 states and 2140 transitions. Second operand 5 states. [2019-11-06 19:10:44,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:10:44,012 INFO L93 Difference]: Finished difference Result 3808 states and 5175 transitions. [2019-11-06 19:10:44,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:10:44,015 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-11-06 19:10:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:10:44,027 INFO L225 Difference]: With dead ends: 3808 [2019-11-06 19:10:44,027 INFO L226 Difference]: Without dead ends: 2225 [2019-11-06 19:10:44,031 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:10:44,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2019-11-06 19:10:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2201. [2019-11-06 19:10:44,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2201 states. [2019-11-06 19:10:44,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2858 transitions. [2019-11-06 19:10:44,091 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2858 transitions. Word has length 145 [2019-11-06 19:10:44,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:10:44,092 INFO L462 AbstractCegarLoop]: Abstraction has 2201 states and 2858 transitions. [2019-11-06 19:10:44,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:10:44,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2858 transitions. [2019-11-06 19:10:44,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-11-06 19:10:44,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:10:44,097 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:44,301 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:10:44,302 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:10:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:10:44,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1626151708, now seen corresponding path program 1 times [2019-11-06 19:10:44,303 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:10:44,303 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614715145] [2019-11-06 19:10:44,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:10:44,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:44,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:10:44,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614715145] [2019-11-06 19:10:44,859 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023269361] [2019-11-06 19:10:44,859 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 19:10:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:10:44,961 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 19:10:44,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:10:45,346 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2019-11-06 19:10:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:10:45,450 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:10:45,450 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-11-06 19:10:45,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560066634] [2019-11-06 19:10:45,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:10:45,451 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:10:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:10:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:10:45,452 INFO L87 Difference]: Start difference. First operand 2201 states and 2858 transitions. Second operand 15 states. [2019-11-06 19:11:03,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:11:03,618 INFO L93 Difference]: Finished difference Result 15165 states and 22706 transitions. [2019-11-06 19:11:03,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-11-06 19:11:03,618 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 261 [2019-11-06 19:11:03,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:11:03,687 INFO L225 Difference]: With dead ends: 15165 [2019-11-06 19:11:03,687 INFO L226 Difference]: Without dead ends: 13158 [2019-11-06 19:11:03,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2663 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1345, Invalid=6311, Unknown=0, NotChecked=0, Total=7656 [2019-11-06 19:11:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13158 states. [2019-11-06 19:11:04,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13158 to 13073. [2019-11-06 19:11:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13073 states. [2019-11-06 19:11:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13073 states to 13073 states and 18036 transitions. [2019-11-06 19:11:04,130 INFO L78 Accepts]: Start accepts. Automaton has 13073 states and 18036 transitions. Word has length 261 [2019-11-06 19:11:04,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:11:04,130 INFO L462 AbstractCegarLoop]: Abstraction has 13073 states and 18036 transitions. [2019-11-06 19:11:04,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 19:11:04,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13073 states and 18036 transitions. [2019-11-06 19:11:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2019-11-06 19:11:04,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:11:04,156 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, 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, 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] [2019-11-06 19:11:04,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:11:04,368 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:11:04,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:11:04,369 INFO L82 PathProgramCache]: Analyzing trace with hash 51966613, now seen corresponding path program 1 times [2019-11-06 19:11:04,369 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:11:04,370 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903374078] [2019-11-06 19:11:04,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:11:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:11:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat