/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/Problem03_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:00:14,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:00:14,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:00:14,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:00:14,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:00:14,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:00:14,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:00:14,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:00:14,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:00:14,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:00:14,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:00:14,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:00:14,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:00:14,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:00:14,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:00:14,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:00:14,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:00:14,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:00:14,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:00:14,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:00:14,889 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 19:00:14,907 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:00:14,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:00:14,909 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:00:14,909 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:00:14,909 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:00:14,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:00:14,910 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:00:14,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:00:14,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:00:14,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:00:14,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:00:14,911 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:00:14,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:00:14,912 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:00:14,912 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:00:14,912 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:00:14,912 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:00:14,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:00:14,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:00:14,914 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:00:14,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:00:14,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:00:14,915 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:00:14,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:00:14,915 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:00:14,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:00:14,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:00:14,916 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:00:14,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:00:15,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:00:15,204 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:00:15,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:00:15,210 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:00:15,210 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:00:15,211 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2019-11-06 19:00:15,285 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfbca6fb/d0cb4e9ba6764501a8da68a422f39439/FLAG5751787a4 [2019-11-06 19:00:15,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:00:15,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label06.c [2019-11-06 19:00:15,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfbca6fb/d0cb4e9ba6764501a8da68a422f39439/FLAG5751787a4 [2019-11-06 19:00:16,124 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4dfbca6fb/d0cb4e9ba6764501a8da68a422f39439 [2019-11-06 19:00:16,131 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:00:16,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:00:16,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:16,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:00:16,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:00:16,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:16" (1/1) ... [2019-11-06 19:00:16,140 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45d5e95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:16, skipping insertion in model container [2019-11-06 19:00:16,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:00:16" (1/1) ... [2019-11-06 19:00:16,147 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:00:16,234 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:00:17,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:17,017 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:00:17,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:00:17,320 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:00:17,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17 WrapperNode [2019-11-06 19:00:17,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:00:17,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:00:17,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:00:17,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:00:17,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,382 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,382 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,438 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,463 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (1/1) ... [2019-11-06 19:00:17,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:00:17,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:00:17,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:00:17,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:00:17,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (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 19:00:17,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:00:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:00:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:00:17,571 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:00:17,571 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:00:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:00:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:00:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:00:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:00:17,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:00:17,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:00:19,625 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:00:19,626 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:00:19,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:19 BoogieIcfgContainer [2019-11-06 19:00:19,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:00:19,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:00:19,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:00:19,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:00:19,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:00:16" (1/3) ... [2019-11-06 19:00:19,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e2ea09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:19, skipping insertion in model container [2019-11-06 19:00:19,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:00:17" (2/3) ... [2019-11-06 19:00:19,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e2ea09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:00:19, skipping insertion in model container [2019-11-06 19:00:19,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:00:19" (3/3) ... [2019-11-06 19:00:19,638 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label06.c [2019-11-06 19:00:19,650 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:00:19,659 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:00:19,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:00:19,713 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:00:19,713 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:00:19,714 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:00:19,714 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:00:19,714 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:00:19,714 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:00:19,714 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:00:19,715 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:00:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:00:19,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 19:00:19,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:19,765 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:19,768 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1888144736, now seen corresponding path program 1 times [2019-11-06 19:00:19,791 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:19,791 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481455690] [2019-11-06 19:00:19,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:20,650 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:20,746 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 19:00:20,747 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481455690] [2019-11-06 19:00:20,748 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:20,748 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:00:20,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485750525] [2019-11-06 19:00:20,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:20,756 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:20,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:20,772 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:00:20,996 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:21,498 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:25,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:25,208 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-11-06 19:00:25,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:25,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2019-11-06 19:00:25,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:25,234 INFO L225 Difference]: With dead ends: 1107 [2019-11-06 19:00:25,235 INFO L226 Difference]: Without dead ends: 699 [2019-11-06 19:00:25,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:00:25,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-11-06 19:00:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-11-06 19:00:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-11-06 19:00:25,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-11-06 19:00:25,345 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 175 [2019-11-06 19:00:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:25,349 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-11-06 19:00:25,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-11-06 19:00:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 19:00:25,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:25,363 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:25,363 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:25,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:25,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1588270708, now seen corresponding path program 1 times [2019-11-06 19:00:25,368 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:25,368 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453888730] [2019-11-06 19:00:25,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:25,719 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:25,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453888730] [2019-11-06 19:00:25,892 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110297428] [2019-11-06 19:00:25,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:00:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:26,121 INFO L256 TraceCheckSpWp]: Trace formula consists of 855 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:00:26,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:26,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:26,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2019-11-06 19:00:26,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206108481] [2019-11-06 19:00:26,211 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:00:26,211 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:26,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:00:26,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:00:26,212 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 5 states. [2019-11-06 19:00:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:27,789 INFO L93 Difference]: Finished difference Result 1418 states and 2188 transitions. [2019-11-06 19:00:27,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:00:27,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2019-11-06 19:00:27,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:27,799 INFO L225 Difference]: With dead ends: 1418 [2019-11-06 19:00:27,799 INFO L226 Difference]: Without dead ends: 950 [2019-11-06 19:00:27,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:00:27,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2019-11-06 19:00:27,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 934. [2019-11-06 19:00:27,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-11-06 19:00:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1406 transitions. [2019-11-06 19:00:27,855 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1406 transitions. Word has length 187 [2019-11-06 19:00:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:27,856 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1406 transitions. [2019-11-06 19:00:27,856 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:00:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1406 transitions. [2019-11-06 19:00:27,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-06 19:00:27,865 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:27,866 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:28,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:28,072 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:28,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:28,073 INFO L82 PathProgramCache]: Analyzing trace with hash -73894969, now seen corresponding path program 1 times [2019-11-06 19:00:28,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:28,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464175644] [2019-11-06 19:00:28,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:28,341 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:28,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:00:28,562 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464175644] [2019-11-06 19:00:28,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:00:28,564 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:00:28,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457802707] [2019-11-06 19:00:28,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:00:28,566 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:00:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:28,576 INFO L87 Difference]: Start difference. First operand 934 states and 1406 transitions. Second operand 9 states. [2019-11-06 19:00:28,764 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:29,613 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:32,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:32,171 INFO L93 Difference]: Finished difference Result 2788 states and 4384 transitions. [2019-11-06 19:00:32,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:00:32,174 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 202 [2019-11-06 19:00:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:32,200 INFO L225 Difference]: With dead ends: 2788 [2019-11-06 19:00:32,201 INFO L226 Difference]: Without dead ends: 1860 [2019-11-06 19:00:32,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:00:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2019-11-06 19:00:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1826. [2019-11-06 19:00:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1826 states. [2019-11-06 19:00:32,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2555 transitions. [2019-11-06 19:00:32,331 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2555 transitions. Word has length 202 [2019-11-06 19:00:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:32,331 INFO L462 AbstractCegarLoop]: Abstraction has 1826 states and 2555 transitions. [2019-11-06 19:00:32,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:00:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2555 transitions. [2019-11-06 19:00:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-06 19:00:32,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:32,340 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:32,340 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:32,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1603258002, now seen corresponding path program 1 times [2019-11-06 19:00:32,341 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:32,341 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525438227] [2019-11-06 19:00:32,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:32,601 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:32,727 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:00:32,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:32,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525438227] [2019-11-06 19:00:32,964 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181208517] [2019-11-06 19:00:32,964 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 19:00:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:33,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 19:00:33,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:33,343 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 19:00:33,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:33,344 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:00:33,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118976842] [2019-11-06 19:00:33,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:00:33,345 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:33,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:00:33,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:33,346 INFO L87 Difference]: Start difference. First operand 1826 states and 2555 transitions. Second operand 11 states. [2019-11-06 19:00:33,497 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:33,955 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:34,202 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:38,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:38,244 INFO L93 Difference]: Finished difference Result 7244 states and 10859 transitions. [2019-11-06 19:00:38,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:00:38,245 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 220 [2019-11-06 19:00:38,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:38,279 INFO L225 Difference]: With dead ends: 7244 [2019-11-06 19:00:38,279 INFO L226 Difference]: Without dead ends: 5424 [2019-11-06 19:00:38,286 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2019-11-06 19:00:38,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2019-11-06 19:00:38,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 5348. [2019-11-06 19:00:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5348 states. [2019-11-06 19:00:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 7374 transitions. [2019-11-06 19:00:38,468 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 7374 transitions. Word has length 220 [2019-11-06 19:00:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:38,468 INFO L462 AbstractCegarLoop]: Abstraction has 5348 states and 7374 transitions. [2019-11-06 19:00:38,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:00:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 7374 transitions. [2019-11-06 19:00:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-11-06 19:00:38,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:38,484 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:38,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:38,691 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:38,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:38,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1338597659, now seen corresponding path program 1 times [2019-11-06 19:00:38,693 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:38,693 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282842155] [2019-11-06 19:00:38,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:38,922 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:39,287 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282842155] [2019-11-06 19:00:39,288 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899496141] [2019-11-06 19:00:39,288 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 19:00:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:39,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:00:39,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 19:00:39,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:39,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:00:39,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157436484] [2019-11-06 19:00:39,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:00:39,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:00:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:39,632 INFO L87 Difference]: Start difference. First operand 5348 states and 7374 transitions. Second operand 3 states. [2019-11-06 19:00:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:40,617 INFO L93 Difference]: Finished difference Result 10696 states and 14778 transitions. [2019-11-06 19:00:40,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:00:40,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2019-11-06 19:00:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:40,645 INFO L225 Difference]: With dead ends: 10696 [2019-11-06 19:00:40,645 INFO L226 Difference]: Without dead ends: 5354 [2019-11-06 19:00:40,659 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:00:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2019-11-06 19:00:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 5344. [2019-11-06 19:00:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2019-11-06 19:00:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 7091 transitions. [2019-11-06 19:00:40,804 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 7091 transitions. Word has length 220 [2019-11-06 19:00:40,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:40,806 INFO L462 AbstractCegarLoop]: Abstraction has 5344 states and 7091 transitions. [2019-11-06 19:00:40,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:00:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 7091 transitions. [2019-11-06 19:00:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-11-06 19:00:40,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:40,821 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:00:41,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:41,027 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:41,029 INFO L82 PathProgramCache]: Analyzing trace with hash -164266544, now seen corresponding path program 1 times [2019-11-06 19:00:41,031 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:41,031 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436141632] [2019-11-06 19:00:41,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,379 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:41,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 19:00:41,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436141632] [2019-11-06 19:00:41,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271612163] [2019-11-06 19:00:41,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:00:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:41,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:00:41,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:41,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 19:00:41,827 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:41,827 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-11-06 19:00:41,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104028293] [2019-11-06 19:00:41,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:00:41,828 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:00:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:41,829 INFO L87 Difference]: Start difference. First operand 5344 states and 7091 transitions. Second operand 3 states. [2019-11-06 19:00:42,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:42,940 INFO L93 Difference]: Finished difference Result 15194 states and 20552 transitions. [2019-11-06 19:00:42,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:00:42,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 221 [2019-11-06 19:00:42,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:42,988 INFO L225 Difference]: With dead ends: 15194 [2019-11-06 19:00:42,988 INFO L226 Difference]: Without dead ends: 9856 [2019-11-06 19:00:43,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:00:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9856 states. [2019-11-06 19:00:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9856 to 9837. [2019-11-06 19:00:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9837 states. [2019-11-06 19:00:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9837 states to 9837 states and 12946 transitions. [2019-11-06 19:00:43,252 INFO L78 Accepts]: Start accepts. Automaton has 9837 states and 12946 transitions. Word has length 221 [2019-11-06 19:00:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:43,253 INFO L462 AbstractCegarLoop]: Abstraction has 9837 states and 12946 transitions. [2019-11-06 19:00:43,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:00:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 9837 states and 12946 transitions. [2019-11-06 19:00:43,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 19:00:43,282 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:43,282 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:43,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:43,496 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:43,497 INFO L82 PathProgramCache]: Analyzing trace with hash 212522786, now seen corresponding path program 1 times [2019-11-06 19:00:43,497 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:43,497 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752525378] [2019-11-06 19:00:43,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,727 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 83 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 19:00:43,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752525378] [2019-11-06 19:00:43,946 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105743743] [2019-11-06 19:00:43,947 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 19:00:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:44,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 1222 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:00:44,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 19:00:44,346 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:00:44,346 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:00:44,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445577550] [2019-11-06 19:00:44,347 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:00:44,348 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:00:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:00:44,348 INFO L87 Difference]: Start difference. First operand 9837 states and 12946 transitions. Second operand 11 states. [2019-11-06 19:00:44,534 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:00:44,926 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-11-06 19:00:47,090 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:00:49,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:00:49,347 INFO L93 Difference]: Finished difference Result 19553 states and 27391 transitions. [2019-11-06 19:00:49,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 19:00:49,348 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 247 [2019-11-06 19:00:49,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:00:49,390 INFO L225 Difference]: With dead ends: 19553 [2019-11-06 19:00:49,390 INFO L226 Difference]: Without dead ends: 9722 [2019-11-06 19:00:49,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:00:49,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9722 states. [2019-11-06 19:00:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9722 to 9491. [2019-11-06 19:00:49,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9491 states. [2019-11-06 19:00:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9491 states to 9491 states and 12126 transitions. [2019-11-06 19:00:49,668 INFO L78 Accepts]: Start accepts. Automaton has 9491 states and 12126 transitions. Word has length 247 [2019-11-06 19:00:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:00:49,668 INFO L462 AbstractCegarLoop]: Abstraction has 9491 states and 12126 transitions. [2019-11-06 19:00:49,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:00:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9491 states and 12126 transitions. [2019-11-06 19:00:49,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2019-11-06 19:00:49,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:00:49,696 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:00:49,902 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:00:49,902 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:00:49,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:00:49,903 INFO L82 PathProgramCache]: Analyzing trace with hash -165293655, now seen corresponding path program 1 times [2019-11-06 19:00:49,904 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:00:49,904 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657259317] [2019-11-06 19:00:49,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:00:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:50,135 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:00:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:00:50,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657259317] [2019-11-06 19:00:50,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57943019] [2019-11-06 19:00:50,437 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 [2019-11-06 19:00:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:00:50,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:00:50,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:00:50,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:00:50,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:00:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 19:00:50,804 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:00:50,804 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-11-06 19:00:50,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087631694] [2019-11-06 19:00:50,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:00:50,805 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:00:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:00:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:00:50,805 INFO L87 Difference]: Start difference. First operand 9491 states and 12126 transitions. Second operand 6 states.