/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/Problem14_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:37,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:37,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:37,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:12:37,768 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 19:12:37,783 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:37,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:37,785 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:37,785 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:37,785 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:37,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:37,786 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:37,786 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:37,786 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:37,786 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:37,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:37,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:37,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:37,787 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:37,787 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:37,789 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:37,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:37,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:37,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:37,789 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:37,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:37,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:37,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:37,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:37,790 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:37,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:37,791 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:37,791 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:37,791 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:38,096 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:38,109 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:38,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:38,114 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:38,114 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:38,115 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-11-06 19:12:38,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f12b3859/0191bae29c0c458a98a03e12828785ea/FLAGfbc8cda75 [2019-11-06 19:12:38,804 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:38,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label10.c [2019-11-06 19:12:38,829 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f12b3859/0191bae29c0c458a98a03e12828785ea/FLAGfbc8cda75 [2019-11-06 19:12:39,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f12b3859/0191bae29c0c458a98a03e12828785ea [2019-11-06 19:12:39,023 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:39,025 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:39,026 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:39,026 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:39,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:39,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ceec6f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39, skipping insertion in model container [2019-11-06 19:12:39,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:39,093 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:39,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:39,675 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:39,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:39,820 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:39,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39 WrapperNode [2019-11-06 19:12:39,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:39,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:39,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:39,822 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:39,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (1/1) ... [2019-11-06 19:12:39,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:39,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:39,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:39,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:39,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (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 19:12:40,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:40,037 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:40,037 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:40,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:41,406 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:41,406 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:41,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:41 BoogieIcfgContainer [2019-11-06 19:12:41,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:41,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:41,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:41,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:41,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:39" (1/3) ... [2019-11-06 19:12:41,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b557854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:41, skipping insertion in model container [2019-11-06 19:12:41,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:39" (2/3) ... [2019-11-06 19:12:41,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b557854 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:41, skipping insertion in model container [2019-11-06 19:12:41,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:41" (3/3) ... [2019-11-06 19:12:41,429 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label10.c [2019-11-06 19:12:41,445 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:41,457 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:41,471 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:41,518 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:41,518 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:41,520 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:41,520 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:41,520 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:41,521 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:41,521 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:41,521 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:12:41,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 19:12:41,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:41,567 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] [2019-11-06 19:12:41,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1708821435, now seen corresponding path program 1 times [2019-11-06 19:12:41,587 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:41,588 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876060758] [2019-11-06 19:12:41,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:42,035 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 19:12:42,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876060758] [2019-11-06 19:12:42,038 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:42,038 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:42,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309070108] [2019-11-06 19:12:42,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:42,047 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:42,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:42,069 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:12:44,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:44,780 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-11-06 19:12:44,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:44,782 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2019-11-06 19:12:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:44,802 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:12:44,802 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:12:44,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:12:44,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:12:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:12:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-11-06 19:12:44,909 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 34 [2019-11-06 19:12:44,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:44,910 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-11-06 19:12:44,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-11-06 19:12:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 19:12:44,924 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:44,924 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:44,925 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash 491390794, now seen corresponding path program 1 times [2019-11-06 19:12:44,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:44,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736935606] [2019-11-06 19:12:44,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,238 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:45,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736935606] [2019-11-06 19:12:45,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118876930] [2019-11-06 19:12:45,239 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 19:12:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:45,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:45,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:45,487 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:45,488 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:45,488 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:45,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486198569] [2019-11-06 19:12:45,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:45,493 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:45,494 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-11-06 19:12:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:46,325 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-11-06 19:12:46,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:46,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-11-06 19:12:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:46,336 INFO L225 Difference]: With dead ends: 1666 [2019-11-06 19:12:46,336 INFO L226 Difference]: Without dead ends: 1112 [2019-11-06 19:12:46,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-11-06 19:12:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-11-06 19:12:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-11-06 19:12:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-11-06 19:12:46,406 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 146 [2019-11-06 19:12:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:46,409 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-11-06 19:12:46,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:46,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-11-06 19:12:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-11-06 19:12:46,415 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:46,416 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:46,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:46,617 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash -404806138, now seen corresponding path program 1 times [2019-11-06 19:12:46,619 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:46,619 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38538925] [2019-11-06 19:12:46,619 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:46,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38538925] [2019-11-06 19:12:46,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441938301] [2019-11-06 19:12:46,868 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 19:12:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:46,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:46,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:46,983 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:46,984 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:46,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007376372] [2019-11-06 19:12:46,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:46,985 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:46,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:46,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:46,986 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-11-06 19:12:47,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:47,996 INFO L93 Difference]: Finished difference Result 3138 states and 4371 transitions. [2019-11-06 19:12:47,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:47,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 164 [2019-11-06 19:12:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:48,009 INFO L225 Difference]: With dead ends: 3138 [2019-11-06 19:12:48,009 INFO L226 Difference]: Without dead ends: 2032 [2019-11-06 19:12:48,012 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-11-06 19:12:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-11-06 19:12:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-11-06 19:12:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2695 transitions. [2019-11-06 19:12:48,076 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2695 transitions. Word has length 164 [2019-11-06 19:12:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:48,077 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2695 transitions. [2019-11-06 19:12:48,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:48,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2695 transitions. [2019-11-06 19:12:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 19:12:48,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:48,085 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:12:48,288 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:48,288 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:48,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:48,289 INFO L82 PathProgramCache]: Analyzing trace with hash -412172690, now seen corresponding path program 1 times [2019-11-06 19:12:48,289 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:48,289 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410969625] [2019-11-06 19:12:48,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:48,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410969625] [2019-11-06 19:12:48,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298218617] [2019-11-06 19:12:48,556 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 19:12:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:48,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:48,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:48,713 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:12:48,713 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:48,713 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:48,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615627004] [2019-11-06 19:12:48,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:48,715 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:48,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:48,715 INFO L87 Difference]: Start difference. First operand 2032 states and 2695 transitions. Second operand 3 states. [2019-11-06 19:12:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:49,646 INFO L93 Difference]: Finished difference Result 4792 states and 6475 transitions. [2019-11-06 19:12:49,647 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:49,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-11-06 19:12:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:49,665 INFO L225 Difference]: With dead ends: 4792 [2019-11-06 19:12:49,665 INFO L226 Difference]: Without dead ends: 2766 [2019-11-06 19:12:49,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2019-11-06 19:12:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2019-11-06 19:12:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2019-11-06 19:12:49,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3606 transitions. [2019-11-06 19:12:49,764 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3606 transitions. Word has length 219 [2019-11-06 19:12:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:49,767 INFO L462 AbstractCegarLoop]: Abstraction has 2766 states and 3606 transitions. [2019-11-06 19:12:49,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:49,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3606 transitions. [2019-11-06 19:12:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-11-06 19:12:49,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:49,777 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:12:49,981 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:49,981 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash -306475396, now seen corresponding path program 1 times [2019-11-06 19:12:49,982 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:49,982 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530451729] [2019-11-06 19:12:49,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,378 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 127 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:50,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530451729] [2019-11-06 19:12:50,379 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572748454] [2019-11-06 19:12:50,379 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 19:12:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:50,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:50,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:50,706 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:50,706 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:12:50,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307488063] [2019-11-06 19:12:50,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:12:50,708 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:50,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:12:50,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:12:50,709 INFO L87 Difference]: Start difference. First operand 2766 states and 3606 transitions. Second operand 11 states. [2019-11-06 19:12:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:54,438 INFO L93 Difference]: Finished difference Result 6888 states and 10127 transitions. [2019-11-06 19:12:54,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:12:54,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 243 [2019-11-06 19:12:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:54,469 INFO L225 Difference]: With dead ends: 6888 [2019-11-06 19:12:54,470 INFO L226 Difference]: Without dead ends: 4310 [2019-11-06 19:12:54,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-11-06 19:12:54,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-11-06 19:12:54,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4194. [2019-11-06 19:12:54,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4194 states. [2019-11-06 19:12:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5850 transitions. [2019-11-06 19:12:54,623 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5850 transitions. Word has length 243 [2019-11-06 19:12:54,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:54,624 INFO L462 AbstractCegarLoop]: Abstraction has 4194 states and 5850 transitions. [2019-11-06 19:12:54,624 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:12:54,624 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5850 transitions. [2019-11-06 19:12:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-11-06 19:12:54,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:54,633 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:12:54,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:54,840 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:54,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:54,841 INFO L82 PathProgramCache]: Analyzing trace with hash -285891538, now seen corresponding path program 1 times [2019-11-06 19:12:54,841 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:54,841 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047144865] [2019-11-06 19:12:54,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:12:55,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047144865] [2019-11-06 19:12:55,099 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377416814] [2019-11-06 19:12:55,099 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 19:12:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:55,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:55,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:12:55,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:55,262 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:55,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782836217] [2019-11-06 19:12:55,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:55,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:55,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:55,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:55,264 INFO L87 Difference]: Start difference. First operand 4194 states and 5850 transitions. Second operand 3 states. [2019-11-06 19:12:56,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:56,151 INFO L93 Difference]: Finished difference Result 8404 states and 12063 transitions. [2019-11-06 19:12:56,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:56,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2019-11-06 19:12:56,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:56,177 INFO L225 Difference]: With dead ends: 8404 [2019-11-06 19:12:56,178 INFO L226 Difference]: Without dead ends: 4582 [2019-11-06 19:12:56,193 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:56,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2019-11-06 19:12:56,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4392. [2019-11-06 19:12:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4392 states. [2019-11-06 19:12:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6310 transitions. [2019-11-06 19:12:56,331 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6310 transitions. Word has length 251 [2019-11-06 19:12:56,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:56,332 INFO L462 AbstractCegarLoop]: Abstraction has 4392 states and 6310 transitions. [2019-11-06 19:12:56,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:56,332 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6310 transitions. [2019-11-06 19:12:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-06 19:12:56,342 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:56,343 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:12:56,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:56,547 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:56,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1025932110, now seen corresponding path program 1 times [2019-11-06 19:12:56,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:56,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034640028] [2019-11-06 19:12:56,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:12:56,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034640028] [2019-11-06 19:12:56,831 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896671964] [2019-11-06 19:12:56,831 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 19:12:56,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:56,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:56,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:12:56,982 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:12:56,982 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:12:56,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908101761] [2019-11-06 19:12:56,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:12:56,983 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:12:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:56,983 INFO L87 Difference]: Start difference. First operand 4392 states and 6310 transitions. Second operand 3 states. [2019-11-06 19:12:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:57,808 INFO L93 Difference]: Finished difference Result 6296 states and 9494 transitions. [2019-11-06 19:12:57,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:12:57,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2019-11-06 19:12:57,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:57,844 INFO L225 Difference]: With dead ends: 6296 [2019-11-06 19:12:57,844 INFO L226 Difference]: Without dead ends: 6294 [2019-11-06 19:12:57,849 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:12:57,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2019-11-06 19:12:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 4608. [2019-11-06 19:12:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4608 states. [2019-11-06 19:12:58,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 6893 transitions. [2019-11-06 19:12:58,007 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 6893 transitions. Word has length 265 [2019-11-06 19:12:58,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:58,008 INFO L462 AbstractCegarLoop]: Abstraction has 4608 states and 6893 transitions. [2019-11-06 19:12:58,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:12:58,008 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 6893 transitions. [2019-11-06 19:12:58,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-11-06 19:12:58,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:58,018 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:12:58,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:12:58,230 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:58,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:58,231 INFO L82 PathProgramCache]: Analyzing trace with hash -672442673, now seen corresponding path program 1 times [2019-11-06 19:12:58,231 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:58,231 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758089116] [2019-11-06 19:12:58,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:12:58,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758089116] [2019-11-06 19:12:58,727 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411380070] [2019-11-06 19:12:58,727 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 [2019-11-06 19:12:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:58,864 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:12:58,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:12:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 135 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:59,018 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:12:59,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:12:59,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666784254] [2019-11-06 19:12:59,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:12:59,021 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:59,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:12:59,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:12:59,022 INFO L87 Difference]: Start difference. First operand 4608 states and 6893 transitions. Second operand 11 states. [2019-11-06 19:13:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:03,454 INFO L93 Difference]: Finished difference Result 13402 states and 24258 transitions. [2019-11-06 19:13:03,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:13:03,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 270 [2019-11-06 19:13:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:03,528 INFO L225 Difference]: With dead ends: 13402 [2019-11-06 19:13:03,528 INFO L226 Difference]: Without dead ends: 7598 [2019-11-06 19:13:03,560 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:13:03,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2019-11-06 19:13:03,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 6556. [2019-11-06 19:13:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6556 states. [2019-11-06 19:13:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10393 transitions. [2019-11-06 19:13:03,901 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10393 transitions. Word has length 270 [2019-11-06 19:13:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:03,901 INFO L462 AbstractCegarLoop]: Abstraction has 6556 states and 10393 transitions. [2019-11-06 19:13:03,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:13:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10393 transitions. [2019-11-06 19:13:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2019-11-06 19:13:03,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:03,918 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:04,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:04,123 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2054792803, now seen corresponding path program 1 times [2019-11-06 19:13:04,124 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:04,124 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483162995] [2019-11-06 19:13:04,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:13:04,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483162995] [2019-11-06 19:13:04,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403460989] [2019-11-06 19:13:04,571 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 [2019-11-06 19:13:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:04,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:04,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 161 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:04,996 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:04,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:13:04,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135637587] [2019-11-06 19:13:05,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:13:05,001 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:05,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:13:05,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:13:05,002 INFO L87 Difference]: Start difference. First operand 6556 states and 10393 transitions. Second operand 11 states. [2019-11-06 19:13:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:06,980 INFO L93 Difference]: Finished difference Result 11174 states and 17838 transitions. [2019-11-06 19:13:06,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:13:06,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 296 [2019-11-06 19:13:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:07,008 INFO L225 Difference]: With dead ends: 11174 [2019-11-06 19:13:07,008 INFO L226 Difference]: Without dead ends: 4990 [2019-11-06 19:13:07,042 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 299 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:13:07,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2019-11-06 19:13:07,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4816. [2019-11-06 19:13:07,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4816 states. [2019-11-06 19:13:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6215 transitions. [2019-11-06 19:13:07,186 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6215 transitions. Word has length 296 [2019-11-06 19:13:07,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:07,187 INFO L462 AbstractCegarLoop]: Abstraction has 4816 states and 6215 transitions. [2019-11-06 19:13:07,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:13:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6215 transitions. [2019-11-06 19:13:07,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-11-06 19:13:07,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:07,201 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:07,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:07,455 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:07,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1461255374, now seen corresponding path program 1 times [2019-11-06 19:13:07,456 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:07,456 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987847700] [2019-11-06 19:13:07,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:07,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:07,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987847700] [2019-11-06 19:13:07,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366800067] [2019-11-06 19:13:07,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:08,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:13:08,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:08,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:13:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 19:13:08,188 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:08,189 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:13:08,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092540330] [2019-11-06 19:13:08,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:08,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:08,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:08,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:13:08,190 INFO L87 Difference]: Start difference. First operand 4816 states and 6215 transitions. Second operand 5 states. [2019-11-06 19:13:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:09,684 INFO L93 Difference]: Finished difference Result 9276 states and 12046 transitions. [2019-11-06 19:13:09,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:13:09,685 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2019-11-06 19:13:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:09,710 INFO L225 Difference]: With dead ends: 9276 [2019-11-06 19:13:09,710 INFO L226 Difference]: Without dead ends: 4640 [2019-11-06 19:13:09,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:13:09,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4640 states. [2019-11-06 19:13:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4640 to 4628. [2019-11-06 19:13:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4628 states. [2019-11-06 19:13:09,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 5907 transitions. [2019-11-06 19:13:09,836 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 5907 transitions. Word has length 299 [2019-11-06 19:13:09,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:09,836 INFO L462 AbstractCegarLoop]: Abstraction has 4628 states and 5907 transitions. [2019-11-06 19:13:09,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 5907 transitions. [2019-11-06 19:13:09,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2019-11-06 19:13:09,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:09,857 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:10,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:10,061 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1622012121, now seen corresponding path program 1 times [2019-11-06 19:13:10,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:10,062 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729302115] [2019-11-06 19:13:10,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:10,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 91 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:13:11,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729302115] [2019-11-06 19:13:11,165 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686011231] [2019-11-06 19:13:11,165 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:11,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:11,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:13:11,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:11,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:13:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 280 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 19:13:11,971 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:11,971 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:13:11,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642946637] [2019-11-06 19:13:11,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:13:11,973 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:11,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:13:11,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:13:11,973 INFO L87 Difference]: Start difference. First operand 4628 states and 5907 transitions. Second operand 16 states.