/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_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:18:25,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:18:25,276 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:18:25,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:18:25,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:18:25,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:18:25,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:18:25,323 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:18:25,324 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:18:25,327 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:18:25,329 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:18:25,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:18:25,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:18:25,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:18:25,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:18:25,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:18:25,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:18:25,357 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:18:25,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:18:25,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:18:25,363 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 19:18:25,381 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:18:25,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:18:25,382 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:18:25,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:18:25,383 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:18:25,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:18:25,383 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:18:25,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:18:25,384 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:18:25,384 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:18:25,384 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:18:25,384 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:18:25,385 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:18:25,385 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:18:25,385 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:18:25,385 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:18:25,385 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:18:25,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:18:25,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:18:25,386 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:18:25,386 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:18:25,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:18:25,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:18:25,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:18:25,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:18:25,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:18:25,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:18:25,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:18:25,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:18:25,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:18:25,705 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:18:25,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:18:25,711 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:18:25,711 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:18:25,712 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-06 19:18:25,782 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686560dc8/bfcfe4f3414f4250b9c00829764c4096/FLAG89fea270a [2019-11-06 19:18:26,435 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:18:26,435 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label36.c [2019-11-06 19:18:26,464 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686560dc8/bfcfe4f3414f4250b9c00829764c4096/FLAG89fea270a [2019-11-06 19:18:26,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/686560dc8/bfcfe4f3414f4250b9c00829764c4096 [2019-11-06 19:18:26,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:18:26,610 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:18:26,611 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:26,611 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:18:26,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:18:26,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:26" (1/1) ... [2019-11-06 19:18:26,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10041329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:26, skipping insertion in model container [2019-11-06 19:18:26,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:18:26" (1/1) ... [2019-11-06 19:18:26,626 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:18:26,690 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:18:27,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:27,558 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:18:27,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:18:27,886 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:18:27,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27 WrapperNode [2019-11-06 19:18:27,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:18:27,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:18:27,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:18:27,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:18:27,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:27,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:27,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:27,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:28,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:28,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:28,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (1/1) ... [2019-11-06 19:18:28,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:18:28,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:18:28,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:18:28,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:18:28,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (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 19:18:28,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:18:28,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:18:28,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:18:28,144 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:18:28,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:18:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:18:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:18:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:18:28,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:18:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:18:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:18:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:18:28,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:18:30,521 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:18:30,521 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:18:30,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:30 BoogieIcfgContainer [2019-11-06 19:18:30,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:18:30,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:18:30,529 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:18:30,535 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:18:30,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:18:26" (1/3) ... [2019-11-06 19:18:30,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3e5765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:30, skipping insertion in model container [2019-11-06 19:18:30,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:18:27" (2/3) ... [2019-11-06 19:18:30,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3e5765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:18:30, skipping insertion in model container [2019-11-06 19:18:30,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:18:30" (3/3) ... [2019-11-06 19:18:30,541 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label36.c [2019-11-06 19:18:30,551 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:18:30,560 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:18:30,572 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:18:30,603 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:18:30,604 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:18:30,604 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:18:30,604 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:18:30,604 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:18:30,604 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:18:30,604 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:18:30,604 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:18:30,649 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:18:30,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 19:18:30,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:30,661 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] [2019-11-06 19:18:30,662 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:30,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:30,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1949415187, now seen corresponding path program 1 times [2019-11-06 19:18:30,678 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:30,678 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436192199] [2019-11-06 19:18:30,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:31,110 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 19:18:31,111 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436192199] [2019-11-06 19:18:31,112 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:18:31,112 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:18:31,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810054726] [2019-11-06 19:18:31,119 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:31,119 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:31,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:18:31,136 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:18:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:36,154 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:18:36,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:18:36,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-11-06 19:18:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:36,183 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:18:36,184 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:18:36,197 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 19:18:36,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:18:36,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:18:36,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:18:36,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:18:36,330 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 42 [2019-11-06 19:18:36,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:36,331 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:18:36,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:18:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-06 19:18:36,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:36,358 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, 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] [2019-11-06 19:18:36,358 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:36,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:36,359 INFO L82 PathProgramCache]: Analyzing trace with hash -525346387, now seen corresponding path program 1 times [2019-11-06 19:18:36,359 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:36,359 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820634650] [2019-11-06 19:18:36,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:36,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:36,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820634650] [2019-11-06 19:18:36,790 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592786503] [2019-11-06 19:18:36,790 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 19:18:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:36,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:36,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 19:18:37,012 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:37,012 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:18:37,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898330093] [2019-11-06 19:18:37,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:37,015 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:37,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:37,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:37,016 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:18:40,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:40,308 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-11-06 19:18:40,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:40,309 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 224 [2019-11-06 19:18:40,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:40,322 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:18:40,322 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:18:40,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:18:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-11-06 19:18:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:18:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-11-06 19:18:40,406 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 224 [2019-11-06 19:18:40,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:40,407 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-11-06 19:18:40,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-11-06 19:18:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-06 19:18:40,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:40,415 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:40,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:40,619 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1071298588, now seen corresponding path program 1 times [2019-11-06 19:18:40,620 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:40,621 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647946576] [2019-11-06 19:18:40,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:40,990 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 70 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:40,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647946576] [2019-11-06 19:18:40,991 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086800563] [2019-11-06 19:18:40,991 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 19:18:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:41,091 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:41,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 19:18:41,161 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:41,161 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:41,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196703829] [2019-11-06 19:18:41,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:41,162 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:41,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:41,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:41,163 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-11-06 19:18:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:44,075 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-11-06 19:18:44,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:44,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 231 [2019-11-06 19:18:44,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:44,107 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:44,108 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:44,114 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:44,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-11-06 19:18:44,252 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 231 [2019-11-06 19:18:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:44,254 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-11-06 19:18:44,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:44,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-11-06 19:18:44,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2019-11-06 19:18:44,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:44,260 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:44,464 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:44,464 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:44,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:44,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1503875532, now seen corresponding path program 1 times [2019-11-06 19:18:44,466 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:44,466 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992251649] [2019-11-06 19:18:44,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:44,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:44,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 155 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:44,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992251649] [2019-11-06 19:18:44,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606919905] [2019-11-06 19:18:44,836 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 19:18:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:44,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:44,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 159 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:45,030 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:45,030 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:45,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082404503] [2019-11-06 19:18:45,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:45,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:45,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:45,032 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-11-06 19:18:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:52,529 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-11-06 19:18:52,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:52,529 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 271 [2019-11-06 19:18:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:52,562 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:52,562 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:52,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-11-06 19:18:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-11-06 19:18:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-11-06 19:18:52,742 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 271 [2019-11-06 19:18:52,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:52,746 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-11-06 19:18:52,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:52,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-11-06 19:18:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2019-11-06 19:18:52,766 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:52,766 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 19:18:52,970 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:52,971 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1688765829, now seen corresponding path program 1 times [2019-11-06 19:18:52,972 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:52,973 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191900932] [2019-11-06 19:18:52,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 140 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-11-06 19:18:53,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191900932] [2019-11-06 19:18:53,826 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547423581] [2019-11-06 19:18:53,826 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 19:18:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:54,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 809 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:54,107 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2019-11-06 19:18:54,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:54,494 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:54,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911291826] [2019-11-06 19:18:54,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:54,495 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:54,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:54,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:54,496 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-11-06 19:18:56,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:56,046 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-11-06 19:18:56,047 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:56,047 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 540 [2019-11-06 19:18:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:56,074 INFO L225 Difference]: With dead ends: 13846 [2019-11-06 19:18:56,075 INFO L226 Difference]: Without dead ends: 7616 [2019-11-06 19:18:56,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 544 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 19:18:56,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-11-06 19:18:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-11-06 19:18:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-11-06 19:18:56,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-11-06 19:18:56,256 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 540 [2019-11-06 19:18:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:56,257 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-11-06 19:18:56,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:56,258 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-11-06 19:18:56,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 655 [2019-11-06 19:18:56,292 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:56,293 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-11-06 19:18:56,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:56,507 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 621076479, now seen corresponding path program 1 times [2019-11-06 19:18:56,517 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:56,517 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137681326] [2019-11-06 19:18:56,517 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 260 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-06 19:18:57,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137681326] [2019-11-06 19:18:57,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144988723] [2019-11-06 19:18:57,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:57,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:57,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 921 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:57,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 654 proven. 2 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2019-11-06 19:18:58,279 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:58,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:18:58,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495258629] [2019-11-06 19:18:58,281 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:18:58,282 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:18:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:58,282 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.