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/Problem14_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:26,620 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:26,623 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:26,634 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:01:26,635 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:01:26,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:01:26,637 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:01:26,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:01:26,641 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:01:26,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:01:26,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:01:26,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:01:26,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:26,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:26,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:26,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:26,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:26,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:26,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:26,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:26,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:26,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:26,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:26,657 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:26,659 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:26,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:26,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:26,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:26,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:01:26,683 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:26,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:26,684 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:26,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:26,685 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:26,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:26,685 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:26,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:26,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:26,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:26,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:26,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:26,686 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:26,687 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:26,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:26,687 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:26,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:26,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:26,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:26,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:26,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:26,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:26,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:26,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:26,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:26,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:26,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:26,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:26,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:26,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:26,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:26,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:26,991 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:26,992 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:26,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-10-14 22:01:27,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfbd6ffe/27af6f03c2434bf7aed3fa25e6ab5106/FLAGa6223b765 [2019-10-14 22:01:27,684 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:27,685 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label17.c [2019-10-14 22:01:27,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfbd6ffe/27af6f03c2434bf7aed3fa25e6ab5106/FLAGa6223b765 [2019-10-14 22:01:27,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecfbd6ffe/27af6f03c2434bf7aed3fa25e6ab5106 [2019-10-14 22:01:27,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:27,983 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:27,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:27,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:27,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:27,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:27" (1/1) ... [2019-10-14 22:01:27,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5a7a8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:27, skipping insertion in model container [2019-10-14 22:01:27,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:27" (1/1) ... [2019-10-14 22:01:28,001 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:28,053 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:28,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:28,648 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:28,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:28,921 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:28,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28 WrapperNode [2019-10-14 22:01:28,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:28,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:28,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:28,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:28,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:28,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:28,976 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:28,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:29,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:29,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:29,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... [2019-10-14 22:01:29,091 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:29,092 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:29,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:29,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:29,093 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:29,168 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:29,169 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:29,169 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:29,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:29,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:30,731 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:30,731 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:30,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:30 BoogieIcfgContainer [2019-10-14 22:01:30,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:30,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:30,738 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:30,744 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:30,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:27" (1/3) ... [2019-10-14 22:01:30,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d56acce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:30, skipping insertion in model container [2019-10-14 22:01:30,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:28" (2/3) ... [2019-10-14 22:01:30,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d56acce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:30, skipping insertion in model container [2019-10-14 22:01:30,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:30" (3/3) ... [2019-10-14 22:01:30,753 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label17.c [2019-10-14 22:01:30,767 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:30,777 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:30,789 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:30,834 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:30,835 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:30,836 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:30,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:30,837 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:30,837 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:30,837 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:30,837 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 22:01:30,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:30,888 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:30,890 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash -950257557, now seen corresponding path program 1 times [2019-10-14 22:01:30,908 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:30,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376238637] [2019-10-14 22:01:30,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:30,909 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:30,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:31,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376238637] [2019-10-14 22:01:31,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:31,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:31,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418275830] [2019-10-14 22:01:31,322 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:31,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:31,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:31,343 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:33,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:33,762 INFO L93 Difference]: Finished difference Result 886 states and 1611 transitions. [2019-10-14 22:01:33,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:33,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2019-10-14 22:01:33,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:33,785 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:01:33,786 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:33,796 INFO L600 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 [2019-10-14 22:01:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:33,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:01:33,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:01:33,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 848 transitions. [2019-10-14 22:01:33,906 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 848 transitions. Word has length 62 [2019-10-14 22:01:33,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:33,906 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 848 transitions. [2019-10-14 22:01:33,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 848 transitions. [2019-10-14 22:01:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:01:33,918 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:33,919 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:33,919 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:33,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:33,921 INFO L82 PathProgramCache]: Analyzing trace with hash -955889055, now seen corresponding path program 1 times [2019-10-14 22:01:33,921 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:33,921 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240463135] [2019-10-14 22:01:33,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:33,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:34,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240463135] [2019-10-14 22:01:34,316 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:34,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:34,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265006785] [2019-10-14 22:01:34,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:34,319 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:34,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:34,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:34,320 INFO L87 Difference]: Start difference. First operand 560 states and 848 transitions. Second operand 9 states. [2019-10-14 22:01:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:36,410 INFO L93 Difference]: Finished difference Result 1702 states and 2664 transitions. [2019-10-14 22:01:36,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:01:36,411 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 141 [2019-10-14 22:01:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:36,420 INFO L225 Difference]: With dead ends: 1702 [2019-10-14 22:01:36,421 INFO L226 Difference]: Without dead ends: 1148 [2019-10-14 22:01:36,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2019-10-14 22:01:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1124. [2019-10-14 22:01:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-14 22:01:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1609 transitions. [2019-10-14 22:01:36,489 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1609 transitions. Word has length 141 [2019-10-14 22:01:36,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:36,490 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1609 transitions. [2019-10-14 22:01:36,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1609 transitions. [2019-10-14 22:01:36,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 22:01:36,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:36,496 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:36,496 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:36,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1117315654, now seen corresponding path program 1 times [2019-10-14 22:01:36,497 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:36,497 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909889151] [2019-10-14 22:01:36,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:36,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 54 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:36,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909889151] [2019-10-14 22:01:36,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698299671] [2019-10-14 22:01:36,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:36,881 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:36,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:36,984 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:36,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:36,985 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:36,985 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854612503] [2019-10-14 22:01:36,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:36,986 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:36,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:36,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:36,987 INFO L87 Difference]: Start difference. First operand 1124 states and 1609 transitions. Second operand 3 states. [2019-10-14 22:01:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:37,804 INFO L93 Difference]: Finished difference Result 2242 states and 3218 transitions. [2019-10-14 22:01:37,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:37,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2019-10-14 22:01:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:37,813 INFO L225 Difference]: With dead ends: 2242 [2019-10-14 22:01:37,813 INFO L226 Difference]: Without dead ends: 1124 [2019-10-14 22:01:37,816 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2019-10-14 22:01:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2019-10-14 22:01:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-14 22:01:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1477 transitions. [2019-10-14 22:01:37,849 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1477 transitions. Word has length 174 [2019-10-14 22:01:37,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:37,850 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1477 transitions. [2019-10-14 22:01:37,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1477 transitions. [2019-10-14 22:01:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-14 22:01:37,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:37,854 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:01:38,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:38,059 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:38,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:38,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1496526325, now seen corresponding path program 1 times [2019-10-14 22:01:38,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:38,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128062667] [2019-10-14 22:01:38,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:38,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:38,413 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:38,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128062667] [2019-10-14 22:01:38,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:38,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:01:38,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766532444] [2019-10-14 22:01:38,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:01:38,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:38,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:01:38,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:38,416 INFO L87 Difference]: Start difference. First operand 1124 states and 1477 transitions. Second operand 8 states. [2019-10-14 22:01:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:40,274 INFO L93 Difference]: Finished difference Result 2850 states and 3834 transitions. [2019-10-14 22:01:40,274 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:40,274 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2019-10-14 22:01:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:40,283 INFO L225 Difference]: With dead ends: 2850 [2019-10-14 22:01:40,283 INFO L226 Difference]: Without dead ends: 1732 [2019-10-14 22:01:40,286 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2019-10-14 22:01:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1514. [2019-10-14 22:01:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-14 22:01:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1946 transitions. [2019-10-14 22:01:40,337 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1946 transitions. Word has length 179 [2019-10-14 22:01:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:40,337 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 1946 transitions. [2019-10-14 22:01:40,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:01:40,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1946 transitions. [2019-10-14 22:01:40,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-14 22:01:40,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:40,344 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:40,344 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:40,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:40,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1091080375, now seen corresponding path program 1 times [2019-10-14 22:01:40,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:40,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841828630] [2019-10-14 22:01:40,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:40,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 22:01:40,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841828630] [2019-10-14 22:01:40,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505580470] [2019-10-14 22:01:40,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:40,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:40,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:01:40,864 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:40,864 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-14 22:01:40,864 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760589396] [2019-10-14 22:01:40,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:40,865 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:40,866 INFO L87 Difference]: Start difference. First operand 1514 states and 1946 transitions. Second operand 3 states. [2019-10-14 22:01:41,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:41,693 INFO L93 Difference]: Finished difference Result 3768 states and 4949 transitions. [2019-10-14 22:01:41,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:41,694 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2019-10-14 22:01:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:41,708 INFO L225 Difference]: With dead ends: 3768 [2019-10-14 22:01:41,708 INFO L226 Difference]: Without dead ends: 2260 [2019-10-14 22:01:41,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:01:41,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2019-10-14 22:01:41,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2260. [2019-10-14 22:01:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2260 states. [2019-10-14 22:01:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2260 states to 2260 states and 2918 transitions. [2019-10-14 22:01:41,777 INFO L78 Accepts]: Start accepts. Automaton has 2260 states and 2918 transitions. Word has length 254 [2019-10-14 22:01:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:41,778 INFO L462 AbstractCegarLoop]: Abstraction has 2260 states and 2918 transitions. [2019-10-14 22:01:41,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:41,779 INFO L276 IsEmpty]: Start isEmpty. Operand 2260 states and 2918 transitions. [2019-10-14 22:01:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-14 22:01:41,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:41,786 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:01:41,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:41,990 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1583973646, now seen corresponding path program 1 times [2019-10-14 22:01:41,992 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:41,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728175366] [2019-10-14 22:01:41,992 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:41,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:41,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:01:42,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728175366] [2019-10-14 22:01:42,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806408173] [2019-10-14 22:01:42,356 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 [2019-10-14 22:01:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:42,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:42,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:01:42,570 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:42,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:42,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003857991] [2019-10-14 22:01:42,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:42,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:42,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:42,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:42,572 INFO L87 Difference]: Start difference. First operand 2260 states and 2918 transitions. Second operand 3 states. [2019-10-14 22:01:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:43,387 INFO L93 Difference]: Finished difference Result 3730 states and 4827 transitions. [2019-10-14 22:01:43,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:43,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 285 [2019-10-14 22:01:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:43,410 INFO L225 Difference]: With dead ends: 3730 [2019-10-14 22:01:43,411 INFO L226 Difference]: Without dead ends: 3728 [2019-10-14 22:01:43,414 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:43,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2019-10-14 22:01:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2452. [2019-10-14 22:01:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2019-10-14 22:01:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 3205 transitions. [2019-10-14 22:01:43,503 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 3205 transitions. Word has length 285 [2019-10-14 22:01:43,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:43,504 INFO L462 AbstractCegarLoop]: Abstraction has 2452 states and 3205 transitions. [2019-10-14 22:01:43,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 3205 transitions. [2019-10-14 22:01:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-10-14 22:01:43,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:43,514 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-14 22:01:43,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:43,718 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1358628013, now seen corresponding path program 1 times [2019-10-14 22:01:43,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:43,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790545123] [2019-10-14 22:01:43,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:43,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:43,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,161 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-14 22:01:44,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790545123] [2019-10-14 22:01:44,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875075944] [2019-10-14 22:01:44,163 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 [2019-10-14 22:01:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:44,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:01:44,332 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-14 22:01:44,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:44,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:01:44,474 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941565725] [2019-10-14 22:01:44,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:01:44,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:44,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:01:44,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:44,478 INFO L87 Difference]: Start difference. First operand 2452 states and 3205 transitions. Second operand 3 states. [2019-10-14 22:01:45,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:45,821 INFO L93 Difference]: Finished difference Result 3734 states and 4860 transitions. [2019-10-14 22:01:45,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:01:45,822 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 316 [2019-10-14 22:01:45,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:45,846 INFO L225 Difference]: With dead ends: 3734 [2019-10-14 22:01:45,847 INFO L226 Difference]: Without dead ends: 3732 [2019-10-14 22:01:45,850 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:45,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2019-10-14 22:01:45,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 2456. [2019-10-14 22:01:45,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2456 states. [2019-10-14 22:01:45,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2456 states to 2456 states and 3211 transitions. [2019-10-14 22:01:45,966 INFO L78 Accepts]: Start accepts. Automaton has 2456 states and 3211 transitions. Word has length 316 [2019-10-14 22:01:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:45,966 INFO L462 AbstractCegarLoop]: Abstraction has 2456 states and 3211 transitions. [2019-10-14 22:01:45,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:01:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 2456 states and 3211 transitions. [2019-10-14 22:01:45,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2019-10-14 22:01:45,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:45,984 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-14 22:01:46,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:46,190 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:46,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:46,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1418580514, now seen corresponding path program 1 times [2019-10-14 22:01:46,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:46,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786136964] [2019-10-14 22:01:46,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:46,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:46,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-10-14 22:01:46,756 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786136964] [2019-10-14 22:01:46,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442456347] [2019-10-14 22:01:46,757 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 [2019-10-14 22:01:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:46,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:01:46,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:47,008 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:01:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-14 22:01:47,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:01:47,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-14 22:01:47,232 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182206107] [2019-10-14 22:01:47,233 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:47,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:47,236 INFO L87 Difference]: Start difference. First operand 2456 states and 3211 transitions. Second operand 5 states. [2019-10-14 22:01:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:48,681 INFO L93 Difference]: Finished difference Result 5296 states and 6893 transitions. [2019-10-14 22:01:48,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:01:48,681 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2019-10-14 22:01:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:48,695 INFO L225 Difference]: With dead ends: 5296 [2019-10-14 22:01:48,695 INFO L226 Difference]: Without dead ends: 2846 [2019-10-14 22:01:48,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:01:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-14 22:01:48,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2832. [2019-10-14 22:01:48,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-14 22:01:48,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3616 transitions. [2019-10-14 22:01:48,773 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3616 transitions. Word has length 325 [2019-10-14 22:01:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:48,775 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3616 transitions. [2019-10-14 22:01:48,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3616 transitions. [2019-10-14 22:01:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2019-10-14 22:01:48,787 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:48,788 INFO L380 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:01:49,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:49,000 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1540192005, now seen corresponding path program 1 times [2019-10-14 22:01:49,001 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:49,002 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033734057] [2019-10-14 22:01:49,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:49,002 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:49,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 175 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:01:50,499 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033734057] [2019-10-14 22:01:50,500 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68388046] [2019-10-14 22:01:50,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:50,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:50,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:01:50,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:50,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:01:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 336 proven. 53 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-14 22:01:50,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:50,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:01:50,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895959023] [2019-10-14 22:01:50,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:01:50,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:01:50,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:01:50,960 INFO L87 Difference]: Start difference. First operand 2832 states and 3616 transitions. Second operand 16 states. [2019-10-14 22:01:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:54,816 INFO L93 Difference]: Finished difference Result 5594 states and 7201 transitions. [2019-10-14 22:01:54,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:01:54,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 409 [2019-10-14 22:01:54,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:54,832 INFO L225 Difference]: With dead ends: 5594 [2019-10-14 22:01:54,832 INFO L226 Difference]: Without dead ends: 2903 [2019-10-14 22:01:54,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 430 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:01:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2019-10-14 22:01:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2830. [2019-10-14 22:01:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2830 states. [2019-10-14 22:01:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2830 states to 2830 states and 3398 transitions. [2019-10-14 22:01:54,920 INFO L78 Accepts]: Start accepts. Automaton has 2830 states and 3398 transitions. Word has length 409 [2019-10-14 22:01:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:54,921 INFO L462 AbstractCegarLoop]: Abstraction has 2830 states and 3398 transitions. [2019-10-14 22:01:54,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:01:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2830 states and 3398 transitions. [2019-10-14 22:01:54,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2019-10-14 22:01:54,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:54,940 INFO L380 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, 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, 3, 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] [2019-10-14 22:01:55,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:55,189 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:55,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:55,190 INFO L82 PathProgramCache]: Analyzing trace with hash -827518533, now seen corresponding path program 1 times [2019-10-14 22:01:55,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:55,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62812632] [2019-10-14 22:01:55,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:55,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:55,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 446 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:01:56,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62812632] [2019-10-14 22:01:56,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833485836] [2019-10-14 22:01:56,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:56,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:01:56,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:01:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 715 proven. 2 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-10-14 22:01:56,626 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:01:56,627 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:01:56,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732335853] [2019-10-14 22:01:56,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:56,629 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:56,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:56,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:56,629 INFO L87 Difference]: Start difference. First operand 2830 states and 3398 transitions. Second operand 9 states. [2019-10-14 22:01:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:58,775 INFO L93 Difference]: Finished difference Result 6762 states and 8216 transitions. [2019-10-14 22:01:58,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:01:58,781 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 544 [2019-10-14 22:01:58,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:58,798 INFO L225 Difference]: With dead ends: 6762 [2019-10-14 22:01:58,798 INFO L226 Difference]: Without dead ends: 4120 [2019-10-14 22:01:58,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 557 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:01:58,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2019-10-14 22:01:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3938. [2019-10-14 22:01:58,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3938 states. [2019-10-14 22:01:58,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 4589 transitions. [2019-10-14 22:01:58,887 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 4589 transitions. Word has length 544 [2019-10-14 22:01:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:58,888 INFO L462 AbstractCegarLoop]: Abstraction has 3938 states and 4589 transitions. [2019-10-14 22:01:58,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:01:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 4589 transitions. [2019-10-14 22:01:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 629 [2019-10-14 22:01:58,910 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:58,911 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 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] [2019-10-14 22:01:59,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:01:59,116 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:59,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:59,117 INFO L82 PathProgramCache]: Analyzing trace with hash 2081536532, now seen corresponding path program 1 times [2019-10-14 22:01:59,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:59,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882009125] [2019-10-14 22:01:59,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,118 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:59,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 593 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-14 22:02:00,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882009125] [2019-10-14 22:02:00,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81932091] [2019-10-14 22:02:00,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:00,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,730 INFO L256 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:00,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:00,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1270 backedges. 941 proven. 2 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-10-14 22:02:01,180 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:01,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:01,180 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022013858] [2019-10-14 22:02:01,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:01,181 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:01,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:01,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:01,182 INFO L87 Difference]: Start difference. First operand 3938 states and 4589 transitions. Second operand 12 states.