/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:47:29,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:47:29,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:47:29,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:47:29,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:47:29,847 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:47:29,848 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:47:29,849 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:47:29,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:47:29,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:47:29,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:47:29,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:47:29,902 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:47:29,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:47:29,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:47:29,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:47:29,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:47:29,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:47:29,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:47:29,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:47:29,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:47:29,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:47:29,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:47:29,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:47:29,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:47:29,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:47:29,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:47:29,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:47:29,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:47:29,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:47:29,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:47:29,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:47:29,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:47:29,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:47:30,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:47:30,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:47:30,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:47:30,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:47:30,334 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:47:30,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2020-12-21 21:47:30,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9e7f6e37/bfa3b5f5c26b4074a55155ef042d5bd9/FLAGf6c7699ca [2020-12-21 21:47:30,996 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:47:30,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i [2020-12-21 21:47:31,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9e7f6e37/bfa3b5f5c26b4074a55155ef042d5bd9/FLAGf6c7699ca [2020-12-21 21:47:31,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9e7f6e37/bfa3b5f5c26b4074a55155ef042d5bd9 [2020-12-21 21:47:31,406 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:47:31,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:47:31,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:47:31,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:47:31,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:47:31,418 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30441456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31, skipping insertion in model container [2020-12-21 21:47:31,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:47:31,446 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:47:31,646 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i[814,827] [2020-12-21 21:47:31,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:47:31,669 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:47:31,684 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_assert_loop_dep.i[814,827] [2020-12-21 21:47:31,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:47:31,705 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:47:31,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31 WrapperNode [2020-12-21 21:47:31,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:47:31,707 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:47:31,707 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:47:31,707 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:47:31,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:47:31,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:47:31,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:47:31,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:47:31,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (1/1) ... [2020-12-21 21:47:31,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:47:31,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:47:31,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:47:31,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:47:31,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (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 [2020-12-21 21:47:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:47:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:47:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:47:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:47:31,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:47:31,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:47:31,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:47:32,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:47:32,146 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-21 21:47:32,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:47:32 BoogieIcfgContainer [2020-12-21 21:47:32,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:47:32,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:47:32,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:47:32,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:47:32,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:47:31" (1/3) ... [2020-12-21 21:47:32,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556239ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:47:32, skipping insertion in model container [2020-12-21 21:47:32,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:31" (2/3) ... [2020-12-21 21:47:32,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@556239ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:47:32, skipping insertion in model container [2020-12-21 21:47:32,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:47:32" (3/3) ... [2020-12-21 21:47:32,159 INFO L111 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2020-12-21 21:47:32,167 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:47:32,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:47:32,193 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:47:32,231 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:47:32,231 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:47:32,232 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:47:32,232 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:47:32,232 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:47:32,232 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:47:32,232 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:47:32,233 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:47:32,263 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-12-21 21:47:32,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-21 21:47:32,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:32,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:32,279 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:32,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:32,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2020-12-21 21:47:32,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:32,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787298761] [2020-12-21 21:47:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:32,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787298761] [2020-12-21 21:47:32,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:47:32,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:47:32,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837607534] [2020-12-21 21:47:32,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:47:32,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:32,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:47:32,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:47:32,624 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 3 states. [2020-12-21 21:47:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:32,690 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2020-12-21 21:47:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:47:32,692 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-21 21:47:32,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:32,701 INFO L225 Difference]: With dead ends: 37 [2020-12-21 21:47:32,702 INFO L226 Difference]: Without dead ends: 21 [2020-12-21 21:47:32,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:47:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-21 21:47:32,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 17. [2020-12-21 21:47:32,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:47:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-21 21:47:32,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2020-12-21 21:47:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:32,737 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-21 21:47:32,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:47:32,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-21 21:47:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-21 21:47:32,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:32,738 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:32,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:47:32,739 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:32,740 INFO L82 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2020-12-21 21:47:32,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:32,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49088410] [2020-12-21 21:47:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:32,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49088410] [2020-12-21 21:47:32,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578529161] [2020-12-21 21:47:32,793 INFO L95 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 [2020-12-21 21:47:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:47:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:32,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:32,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:47:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908403176] [2020-12-21 21:47:32,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:47:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:32,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:47:32,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:47:32,931 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-21 21:47:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:32,988 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-12-21 21:47:32,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:47:32,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-21 21:47:32,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:32,991 INFO L225 Difference]: With dead ends: 42 [2020-12-21 21:47:32,991 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:47:32,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:47:32,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:47:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-12-21 21:47:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:47:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-21 21:47:32,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-12-21 21:47:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:32,999 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-21 21:47:32,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:47:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-21 21:47:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:47:33,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:33,000 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:33,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:47:33,216 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:33,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:33,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1083191413, now seen corresponding path program 2 times [2020-12-21 21:47:33,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:33,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729554125] [2020-12-21 21:47:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:33,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729554125] [2020-12-21 21:47:33,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318455493] [2020-12-21 21:47:33,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 21:47:33,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:47:33,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:33,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:47:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:33,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:33,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:47:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281932305] [2020-12-21 21:47:33,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:47:33,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:33,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:47:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:47:33,402 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2020-12-21 21:47:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:33,495 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-12-21 21:47:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:47:33,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-21 21:47:33,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:33,497 INFO L225 Difference]: With dead ends: 56 [2020-12-21 21:47:33,497 INFO L226 Difference]: Without dead ends: 39 [2020-12-21 21:47:33,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:47:33,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-21 21:47:33,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-12-21 21:47:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-21 21:47:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-21 21:47:33,514 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2020-12-21 21:47:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:33,514 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-21 21:47:33,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:47:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-21 21:47:33,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-21 21:47:33,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:33,519 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:33,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:33,733 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:33,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:33,735 INFO L82 PathProgramCache]: Analyzing trace with hash 80520521, now seen corresponding path program 3 times [2020-12-21 21:47:33,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:33,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530004744] [2020-12-21 21:47:33,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:33,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530004744] [2020-12-21 21:47:33,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293283065] [2020-12-21 21:47:33,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 21:47:33,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:47:33,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:47:33,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:33,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:33,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:33,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:47:33,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235434205] [2020-12-21 21:47:33,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:47:33,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:47:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:47:33,939 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-12-21 21:47:34,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:34,040 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-12-21 21:47:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:47:34,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-21 21:47:34,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:34,042 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:47:34,042 INFO L226 Difference]: Without dead ends: 48 [2020-12-21 21:47:34,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:47:34,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-21 21:47:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-12-21 21:47:34,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:47:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-21 21:47:34,052 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 13 [2020-12-21 21:47:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:34,052 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-21 21:47:34,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:47:34,052 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-21 21:47:34,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-21 21:47:34,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:34,053 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:34,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:34,267 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:34,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 4 times [2020-12-21 21:47:34,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:34,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250211535] [2020-12-21 21:47:34,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250211535] [2020-12-21 21:47:34,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469875454] [2020-12-21 21:47:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-21 21:47:34,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:47:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:47:34,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:34,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:34,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:47:34,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943102058] [2020-12-21 21:47:34,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:47:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:34,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:47:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:47:34,517 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 8 states. [2020-12-21 21:47:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:34,625 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-12-21 21:47:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:47:34,626 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-21 21:47:34,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:34,627 INFO L225 Difference]: With dead ends: 84 [2020-12-21 21:47:34,627 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:47:34,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:47:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:47:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-12-21 21:47:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-21 21:47:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-21 21:47:34,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 15 [2020-12-21 21:47:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:34,636 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-21 21:47:34,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:47:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-21 21:47:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:47:34,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:34,637 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:34,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:34,851 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1638582853, now seen corresponding path program 5 times [2020-12-21 21:47:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:34,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457138245] [2020-12-21 21:47:34,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457138245] [2020-12-21 21:47:35,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291652069] [2020-12-21 21:47:35,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-21 21:47:35,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:47:35,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:35,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:47:35,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:35,139 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:35,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:35,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:47:35,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081341992] [2020-12-21 21:47:35,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:47:35,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:35,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:47:35,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:47:35,143 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 9 states. [2020-12-21 21:47:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:35,256 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2020-12-21 21:47:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:47:35,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-12-21 21:47:35,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:35,257 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:47:35,258 INFO L226 Difference]: Without dead ends: 66 [2020-12-21 21:47:35,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:47:35,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-21 21:47:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 52. [2020-12-21 21:47:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:47:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-21 21:47:35,265 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 17 [2020-12-21 21:47:35,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:35,266 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-21 21:47:35,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:47:35,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-21 21:47:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:47:35,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:35,267 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:35,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:47:35,483 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:35,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:35,484 INFO L82 PathProgramCache]: Analyzing trace with hash 70506883, now seen corresponding path program 6 times [2020-12-21 21:47:35,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:35,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282455008] [2020-12-21 21:47:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:35,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:35,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282455008] [2020-12-21 21:47:35,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569089464] [2020-12-21 21:47:35,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-21 21:47:35,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:47:35,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:47:35,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:35,679 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:35,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:35,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:47:35,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142790364] [2020-12-21 21:47:35,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:47:35,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:47:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:47:35,682 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-12-21 21:47:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:35,760 INFO L93 Difference]: Finished difference Result 112 states and 123 transitions. [2020-12-21 21:47:35,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:47:35,760 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-12-21 21:47:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:35,761 INFO L225 Difference]: With dead ends: 112 [2020-12-21 21:47:35,761 INFO L226 Difference]: Without dead ends: 75 [2020-12-21 21:47:35,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:47:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-21 21:47:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 59. [2020-12-21 21:47:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:47:35,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-12-21 21:47:35,769 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 19 [2020-12-21 21:47:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:35,769 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-12-21 21:47:35,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:47:35,770 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-12-21 21:47:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:47:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:35,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:35,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:35,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:35,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:35,989 INFO L82 PathProgramCache]: Analyzing trace with hash 683020609, now seen corresponding path program 7 times [2020-12-21 21:47:35,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:35,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620015324] [2020-12-21 21:47:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:36,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620015324] [2020-12-21 21:47:36,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537294538] [2020-12-21 21:47:36,081 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2020-12-21 21:47:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:47:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:36,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:36,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:47:36,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946271716] [2020-12-21 21:47:36,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:47:36,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:36,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:47:36,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:47:36,180 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2020-12-21 21:47:36,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:36,279 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-12-21 21:47:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:47:36,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-21 21:47:36,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:36,281 INFO L225 Difference]: With dead ends: 126 [2020-12-21 21:47:36,281 INFO L226 Difference]: Without dead ends: 84 [2020-12-21 21:47:36,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:47:36,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-21 21:47:36,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-12-21 21:47:36,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:47:36,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2020-12-21 21:47:36,288 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 21 [2020-12-21 21:47:36,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:36,288 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2020-12-21 21:47:36,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:47:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2020-12-21 21:47:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:47:36,289 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:36,290 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:36,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:36,504 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash 898191743, now seen corresponding path program 8 times [2020-12-21 21:47:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:36,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628624533] [2020-12-21 21:47:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:36,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628624533] [2020-12-21 21:47:36,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325977261] [2020-12-21 21:47:36,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-21 21:47:36,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:47:36,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:36,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:47:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:36,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:36,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:36,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:47:36,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845207036] [2020-12-21 21:47:36,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:47:36,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:36,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:47:36,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:47:36,706 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 12 states. [2020-12-21 21:47:36,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:36,804 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2020-12-21 21:47:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:47:36,804 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-12-21 21:47:36,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:36,805 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:47:36,805 INFO L226 Difference]: Without dead ends: 93 [2020-12-21 21:47:36,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:47:36,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-21 21:47:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-12-21 21:47:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-21 21:47:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-12-21 21:47:36,813 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2020-12-21 21:47:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:36,813 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-12-21 21:47:36,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:47:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-12-21 21:47:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:47:36,814 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:36,814 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:37,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:47:37,028 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:37,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1519221309, now seen corresponding path program 9 times [2020-12-21 21:47:37,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:37,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755912825] [2020-12-21 21:47:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:37,140 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:37,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755912825] [2020-12-21 21:47:37,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367918504] [2020-12-21 21:47:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-21 21:47:37,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:47:37,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:37,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:47:37,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:37,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:37,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:47:37,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742555877] [2020-12-21 21:47:37,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:47:37,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:37,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:47:37,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:47:37,264 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 13 states. [2020-12-21 21:47:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:37,371 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2020-12-21 21:47:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:47:37,372 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-21 21:47:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:37,373 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:47:37,373 INFO L226 Difference]: Without dead ends: 102 [2020-12-21 21:47:37,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:47:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-21 21:47:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2020-12-21 21:47:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:47:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-12-21 21:47:37,380 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 25 [2020-12-21 21:47:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:37,381 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-12-21 21:47:37,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:47:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-12-21 21:47:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-21 21:47:37,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:37,382 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:37,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:37,596 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:37,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:37,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 10 times [2020-12-21 21:47:37,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:37,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057911287] [2020-12-21 21:47:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057911287] [2020-12-21 21:47:37,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078286024] [2020-12-21 21:47:37,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-21 21:47:37,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:47:37,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:37,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:47:37,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:37,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:37,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:47:37,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738197845] [2020-12-21 21:47:37,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:47:37,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:47:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:47:37,845 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 14 states. [2020-12-21 21:47:37,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:37,962 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-12-21 21:47:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:47:37,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-12-21 21:47:37,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:37,965 INFO L225 Difference]: With dead ends: 168 [2020-12-21 21:47:37,965 INFO L226 Difference]: Without dead ends: 111 [2020-12-21 21:47:37,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:47:37,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-21 21:47:37,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-21 21:47:37,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-21 21:47:37,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2020-12-21 21:47:37,980 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 27 [2020-12-21 21:47:37,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:37,980 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2020-12-21 21:47:37,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:47:37,981 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2020-12-21 21:47:37,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:47:37,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:37,986 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:38,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:38,201 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:38,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:38,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1873803975, now seen corresponding path program 11 times [2020-12-21 21:47:38,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:38,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156139688] [2020-12-21 21:47:38,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156139688] [2020-12-21 21:47:38,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060293348] [2020-12-21 21:47:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:38,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-21 21:47:38,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:47:38,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:38,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:38,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-21 21:47:38,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761553421] [2020-12-21 21:47:38,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-21 21:47:38,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:38,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-21 21:47:38,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:47:38,490 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand 15 states. [2020-12-21 21:47:38,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:38,617 INFO L93 Difference]: Finished difference Result 182 states and 198 transitions. [2020-12-21 21:47:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:47:38,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 29 [2020-12-21 21:47:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:38,618 INFO L225 Difference]: With dead ends: 182 [2020-12-21 21:47:38,618 INFO L226 Difference]: Without dead ends: 120 [2020-12-21 21:47:38,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-21 21:47:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-21 21:47:38,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 94. [2020-12-21 21:47:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-21 21:47:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-12-21 21:47:38,624 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 29 [2020-12-21 21:47:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:38,624 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-12-21 21:47:38,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-21 21:47:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-12-21 21:47:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:47:38,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:38,625 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:38,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:47:38,839 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash 511059831, now seen corresponding path program 12 times [2020-12-21 21:47:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:38,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163617167] [2020-12-21 21:47:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:39,003 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:39,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163617167] [2020-12-21 21:47:39,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565440292] [2020-12-21 21:47:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:39,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:47:39,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:39,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:47:39,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:39,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:39,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:47:39,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455451494] [2020-12-21 21:47:39,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:47:39,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:39,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:47:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:47:39,229 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 16 states. [2020-12-21 21:47:39,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:39,364 INFO L93 Difference]: Finished difference Result 196 states and 213 transitions. [2020-12-21 21:47:39,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:47:39,364 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2020-12-21 21:47:39,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:39,365 INFO L225 Difference]: With dead ends: 196 [2020-12-21 21:47:39,365 INFO L226 Difference]: Without dead ends: 129 [2020-12-21 21:47:39,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:47:39,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-21 21:47:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-12-21 21:47:39,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 21:47:39,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2020-12-21 21:47:39,371 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 31 [2020-12-21 21:47:39,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:39,371 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2020-12-21 21:47:39,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:47:39,371 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2020-12-21 21:47:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-21 21:47:39,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:39,372 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:39,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-21 21:47:39,586 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:39,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1147358667, now seen corresponding path program 13 times [2020-12-21 21:47:39,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:39,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989781424] [2020-12-21 21:47:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989781424] [2020-12-21 21:47:39,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087530034] [2020-12-21 21:47:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:39,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:47:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:39,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:39,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:47:39,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112946486] [2020-12-21 21:47:39,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:47:39,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:39,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:47:39,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:47:39,878 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand 17 states. [2020-12-21 21:47:40,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:40,031 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2020-12-21 21:47:40,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:47:40,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-12-21 21:47:40,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:40,033 INFO L225 Difference]: With dead ends: 210 [2020-12-21 21:47:40,033 INFO L226 Difference]: Without dead ends: 138 [2020-12-21 21:47:40,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:47:40,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-21 21:47:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 108. [2020-12-21 21:47:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-21 21:47:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-12-21 21:47:40,039 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 33 [2020-12-21 21:47:40,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:40,039 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-12-21 21:47:40,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:47:40,040 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-12-21 21:47:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:47:40,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:40,040 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:40,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-21 21:47:40,256 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1454668429, now seen corresponding path program 14 times [2020-12-21 21:47:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:40,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096745186] [2020-12-21 21:47:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:40,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096745186] [2020-12-21 21:47:40,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713454866] [2020-12-21 21:47:40,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:40,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:47:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:47:40,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:40,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:40,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-21 21:47:40,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398778247] [2020-12-21 21:47:40,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:47:40,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:47:40,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:47:40,575 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 18 states. [2020-12-21 21:47:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:40,718 INFO L93 Difference]: Finished difference Result 224 states and 243 transitions. [2020-12-21 21:47:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-21 21:47:40,718 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 35 [2020-12-21 21:47:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:40,719 INFO L225 Difference]: With dead ends: 224 [2020-12-21 21:47:40,719 INFO L226 Difference]: Without dead ends: 147 [2020-12-21 21:47:40,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:47:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-21 21:47:40,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-12-21 21:47:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:47:40,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2020-12-21 21:47:40,724 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 35 [2020-12-21 21:47:40,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:40,725 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2020-12-21 21:47:40,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:47:40,725 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2020-12-21 21:47:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-21 21:47:40,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:40,726 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:40,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:40,935 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:40,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:40,936 INFO L82 PathProgramCache]: Analyzing trace with hash -426606287, now seen corresponding path program 15 times [2020-12-21 21:47:40,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:40,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128682846] [2020-12-21 21:47:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:41,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128682846] [2020-12-21 21:47:41,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590985973] [2020-12-21 21:47:41,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:41,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:47:41,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:41,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:47:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:41,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:41,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:47:41,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669890793] [2020-12-21 21:47:41,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:47:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:47:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:47:41,431 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand 19 states. [2020-12-21 21:47:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:41,590 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2020-12-21 21:47:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:47:41,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 37 [2020-12-21 21:47:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:41,592 INFO L225 Difference]: With dead ends: 238 [2020-12-21 21:47:41,592 INFO L226 Difference]: Without dead ends: 156 [2020-12-21 21:47:41,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:47:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-21 21:47:41,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 122. [2020-12-21 21:47:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-21 21:47:41,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2020-12-21 21:47:41,597 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 37 [2020-12-21 21:47:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:41,597 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2020-12-21 21:47:41,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:47:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2020-12-21 21:47:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-21 21:47:41,598 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:41,598 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:41,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:47:41,812 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:41,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:41,813 INFO L82 PathProgramCache]: Analyzing trace with hash -301365905, now seen corresponding path program 16 times [2020-12-21 21:47:41,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:41,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813346690] [2020-12-21 21:47:41,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:41,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:42,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813346690] [2020-12-21 21:47:42,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494754607] [2020-12-21 21:47:42,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:42,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:47:42,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:42,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:47:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:42,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:42,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:47:42,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453310392] [2020-12-21 21:47:42,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:47:42,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:47:42,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:47:42,157 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand 20 states. [2020-12-21 21:47:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:42,327 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2020-12-21 21:47:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:47:42,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-21 21:47:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:42,330 INFO L225 Difference]: With dead ends: 252 [2020-12-21 21:47:42,330 INFO L226 Difference]: Without dead ends: 165 [2020-12-21 21:47:42,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:47:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-21 21:47:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 129. [2020-12-21 21:47:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-21 21:47:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-12-21 21:47:42,336 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 39 [2020-12-21 21:47:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:42,337 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-12-21 21:47:42,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:47:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-12-21 21:47:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:47:42,337 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:42,338 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:42,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:47:42,551 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash -204443091, now seen corresponding path program 17 times [2020-12-21 21:47:42,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:42,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861063046] [2020-12-21 21:47:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:42,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861063046] [2020-12-21 21:47:42,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863541007] [2020-12-21 21:47:42,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:43,052 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-21 21:47:43,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:43,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-21 21:47:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:43,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:43,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-21 21:47:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526957654] [2020-12-21 21:47:43,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-21 21:47:43,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:43,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-21 21:47:43,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:47:43,141 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 21 states. [2020-12-21 21:47:43,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:43,347 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2020-12-21 21:47:43,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-21 21:47:43,348 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2020-12-21 21:47:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:43,350 INFO L225 Difference]: With dead ends: 266 [2020-12-21 21:47:43,350 INFO L226 Difference]: Without dead ends: 174 [2020-12-21 21:47:43,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-21 21:47:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-21 21:47:43,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2020-12-21 21:47:43,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-21 21:47:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2020-12-21 21:47:43,360 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 41 [2020-12-21 21:47:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:43,360 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2020-12-21 21:47:43,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-21 21:47:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2020-12-21 21:47:43,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:47:43,363 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:43,363 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:43,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-21 21:47:43,577 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:43,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:43,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1550899349, now seen corresponding path program 18 times [2020-12-21 21:47:43,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:43,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126885616] [2020-12-21 21:47:43,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:43,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126885616] [2020-12-21 21:47:43,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840581100] [2020-12-21 21:47:43,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:44,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-21 21:47:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:47:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:44,486 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:44,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:44,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:47:44,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792369113] [2020-12-21 21:47:44,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:47:44,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:44,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:47:44,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:47:44,491 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand 22 states. [2020-12-21 21:47:44,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:44,681 INFO L93 Difference]: Finished difference Result 280 states and 303 transitions. [2020-12-21 21:47:44,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:47:44,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-12-21 21:47:44,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:44,683 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:47:44,683 INFO L226 Difference]: Without dead ends: 183 [2020-12-21 21:47:44,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:47:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-12-21 21:47:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2020-12-21 21:47:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-21 21:47:44,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2020-12-21 21:47:44,689 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 43 [2020-12-21 21:47:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:44,689 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2020-12-21 21:47:44,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:47:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2020-12-21 21:47:44,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:47:44,690 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:44,690 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:44,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:44,904 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:44,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:44,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1584760105, now seen corresponding path program 19 times [2020-12-21 21:47:44,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:44,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799630614] [2020-12-21 21:47:44,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799630614] [2020-12-21 21:47:45,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257040535] [2020-12-21 21:47:45,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:45,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:47:45,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:45,317 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:45,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:45,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:47:45,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906124099] [2020-12-21 21:47:45,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:47:45,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:47:45,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:47:45,321 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand 23 states. [2020-12-21 21:47:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:45,543 INFO L93 Difference]: Finished difference Result 294 states and 318 transitions. [2020-12-21 21:47:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:47:45,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2020-12-21 21:47:45,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:45,545 INFO L225 Difference]: With dead ends: 294 [2020-12-21 21:47:45,545 INFO L226 Difference]: Without dead ends: 192 [2020-12-21 21:47:45,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:47:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-21 21:47:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-12-21 21:47:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-21 21:47:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 172 transitions. [2020-12-21 21:47:45,552 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 172 transitions. Word has length 45 [2020-12-21 21:47:45,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:45,552 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 172 transitions. [2020-12-21 21:47:45,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:47:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 172 transitions. [2020-12-21 21:47:45,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:47:45,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:45,553 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:45,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:45,767 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:45,768 INFO L82 PathProgramCache]: Analyzing trace with hash -113546393, now seen corresponding path program 20 times [2020-12-21 21:47:45,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:45,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847444275] [2020-12-21 21:47:45,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847444275] [2020-12-21 21:47:46,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665825896] [2020-12-21 21:47:46,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:46,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:47:46,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-21 21:47:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:46,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:46,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-21 21:47:46,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401777360] [2020-12-21 21:47:46,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-21 21:47:46,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:46,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-21 21:47:46,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:47:46,189 INFO L87 Difference]: Start difference. First operand 150 states and 172 transitions. Second operand 24 states. [2020-12-21 21:47:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:46,426 INFO L93 Difference]: Finished difference Result 308 states and 333 transitions. [2020-12-21 21:47:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-21 21:47:46,426 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 47 [2020-12-21 21:47:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:46,428 INFO L225 Difference]: With dead ends: 308 [2020-12-21 21:47:46,428 INFO L226 Difference]: Without dead ends: 201 [2020-12-21 21:47:46,429 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-21 21:47:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-21 21:47:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 157. [2020-12-21 21:47:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-21 21:47:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 180 transitions. [2020-12-21 21:47:46,435 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 180 transitions. Word has length 47 [2020-12-21 21:47:46,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:46,436 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 180 transitions. [2020-12-21 21:47:46,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-21 21:47:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 180 transitions. [2020-12-21 21:47:46,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-21 21:47:46,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:46,436 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:46,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:47:46,650 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash -98518491, now seen corresponding path program 21 times [2020-12-21 21:47:46,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:46,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612690216] [2020-12-21 21:47:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:46,987 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:46,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612690216] [2020-12-21 21:47:46,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64287309] [2020-12-21 21:47:46,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:47,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-21 21:47:47,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:47,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:47:47,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:47,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:47,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:47:47,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551593217] [2020-12-21 21:47:47,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:47:47,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:47:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:47:47,278 INFO L87 Difference]: Start difference. First operand 157 states and 180 transitions. Second operand 25 states. [2020-12-21 21:47:47,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:47,485 INFO L93 Difference]: Finished difference Result 322 states and 348 transitions. [2020-12-21 21:47:47,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:47:47,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-12-21 21:47:47,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:47,488 INFO L225 Difference]: With dead ends: 322 [2020-12-21 21:47:47,488 INFO L226 Difference]: Without dead ends: 210 [2020-12-21 21:47:47,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:47:47,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-21 21:47:47,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 164. [2020-12-21 21:47:47,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-21 21:47:47,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 188 transitions. [2020-12-21 21:47:47,503 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 188 transitions. Word has length 49 [2020-12-21 21:47:47,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:47,504 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 188 transitions. [2020-12-21 21:47:47,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:47:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 188 transitions. [2020-12-21 21:47:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:47:47,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:47,504 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:47,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:47:47,721 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:47,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:47,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 22 times [2020-12-21 21:47:47,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:47,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740428599] [2020-12-21 21:47:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:48,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740428599] [2020-12-21 21:47:48,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767510941] [2020-12-21 21:47:48,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:48,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:47:48,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:48,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:47:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:48,226 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:48,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:48,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:47:48,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093721944] [2020-12-21 21:47:48,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:47:48,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:48,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:47:48,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:47:48,230 INFO L87 Difference]: Start difference. First operand 164 states and 188 transitions. Second operand 26 states. [2020-12-21 21:47:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:48,472 INFO L93 Difference]: Finished difference Result 336 states and 363 transitions. [2020-12-21 21:47:48,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:47:48,472 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2020-12-21 21:47:48,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:48,474 INFO L225 Difference]: With dead ends: 336 [2020-12-21 21:47:48,474 INFO L226 Difference]: Without dead ends: 219 [2020-12-21 21:47:48,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:47:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-21 21:47:48,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 171. [2020-12-21 21:47:48,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-21 21:47:48,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 196 transitions. [2020-12-21 21:47:48,480 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 196 transitions. Word has length 51 [2020-12-21 21:47:48,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:48,480 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 196 transitions. [2020-12-21 21:47:48,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:47:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 196 transitions. [2020-12-21 21:47:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:47:48,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:48,481 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:48,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:48,692 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:48,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:48,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1292824287, now seen corresponding path program 23 times [2020-12-21 21:47:48,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:48,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096133859] [2020-12-21 21:47:48,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:49,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096133859] [2020-12-21 21:47:49,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148450551] [2020-12-21 21:47:49,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:49,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-21 21:47:49,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-21 21:47:49,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:49,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:49,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-21 21:47:49,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602106662] [2020-12-21 21:47:49,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-21 21:47:49,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-21 21:47:49,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:47:49,523 INFO L87 Difference]: Start difference. First operand 171 states and 196 transitions. Second operand 27 states. [2020-12-21 21:47:49,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:49,763 INFO L93 Difference]: Finished difference Result 350 states and 378 transitions. [2020-12-21 21:47:49,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:47:49,764 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2020-12-21 21:47:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:49,765 INFO L225 Difference]: With dead ends: 350 [2020-12-21 21:47:49,765 INFO L226 Difference]: Without dead ends: 228 [2020-12-21 21:47:49,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-21 21:47:49,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-21 21:47:49,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 178. [2020-12-21 21:47:49,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-21 21:47:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 204 transitions. [2020-12-21 21:47:49,773 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 204 transitions. Word has length 53 [2020-12-21 21:47:49,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:49,773 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 204 transitions. [2020-12-21 21:47:49,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-21 21:47:49,773 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 204 transitions. [2020-12-21 21:47:49,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-21 21:47:49,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:49,774 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:49,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:47:49,988 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:49,989 INFO L82 PathProgramCache]: Analyzing trace with hash 486791519, now seen corresponding path program 24 times [2020-12-21 21:47:49,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:49,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849423569] [2020-12-21 21:47:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:50,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849423569] [2020-12-21 21:47:50,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554788957] [2020-12-21 21:47:50,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:52,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:47:52,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:52,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:47:52,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:52,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:52,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:47:52,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284452824] [2020-12-21 21:47:52,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:47:52,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:52,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:47:52,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:47:52,960 INFO L87 Difference]: Start difference. First operand 178 states and 204 transitions. Second operand 28 states. [2020-12-21 21:47:53,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:53,219 INFO L93 Difference]: Finished difference Result 364 states and 393 transitions. [2020-12-21 21:47:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:47:53,220 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 55 [2020-12-21 21:47:53,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:53,221 INFO L225 Difference]: With dead ends: 364 [2020-12-21 21:47:53,221 INFO L226 Difference]: Without dead ends: 237 [2020-12-21 21:47:53,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:47:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-21 21:47:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 185. [2020-12-21 21:47:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-21 21:47:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 212 transitions. [2020-12-21 21:47:53,228 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 212 transitions. Word has length 55 [2020-12-21 21:47:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:53,228 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 212 transitions. [2020-12-21 21:47:53,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:47:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 212 transitions. [2020-12-21 21:47:53,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-21 21:47:53,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:53,232 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:53,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:53,446 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:53,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:53,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1300597277, now seen corresponding path program 25 times [2020-12-21 21:47:53,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:53,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771797044] [2020-12-21 21:47:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:53,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771797044] [2020-12-21 21:47:53,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758580896] [2020-12-21 21:47:53,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:53,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:47:53,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:54,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:54,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:47:54,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822628877] [2020-12-21 21:47:54,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:47:54,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:54,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:47:54,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:47:54,028 INFO L87 Difference]: Start difference. First operand 185 states and 212 transitions. Second operand 29 states. [2020-12-21 21:47:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:54,292 INFO L93 Difference]: Finished difference Result 378 states and 408 transitions. [2020-12-21 21:47:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:47:54,293 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 57 [2020-12-21 21:47:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:54,294 INFO L225 Difference]: With dead ends: 378 [2020-12-21 21:47:54,294 INFO L226 Difference]: Without dead ends: 246 [2020-12-21 21:47:54,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:47:54,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-21 21:47:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 192. [2020-12-21 21:47:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-21 21:47:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 220 transitions. [2020-12-21 21:47:54,301 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 220 transitions. Word has length 57 [2020-12-21 21:47:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:54,301 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 220 transitions. [2020-12-21 21:47:54,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:47:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 220 transitions. [2020-12-21 21:47:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:47:54,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:54,302 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:54,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-21 21:47:54,515 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:54,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1683882843, now seen corresponding path program 26 times [2020-12-21 21:47:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:54,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61232907] [2020-12-21 21:47:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61232907] [2020-12-21 21:47:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821741569] [2020-12-21 21:47:54,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:55,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:47:55,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:55,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-21 21:47:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:55,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:55,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-21 21:47:55,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590458722] [2020-12-21 21:47:55,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:47:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:47:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:47:55,114 INFO L87 Difference]: Start difference. First operand 192 states and 220 transitions. Second operand 30 states. [2020-12-21 21:47:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:55,371 INFO L93 Difference]: Finished difference Result 392 states and 423 transitions. [2020-12-21 21:47:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-21 21:47:55,372 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 59 [2020-12-21 21:47:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:55,374 INFO L225 Difference]: With dead ends: 392 [2020-12-21 21:47:55,374 INFO L226 Difference]: Without dead ends: 255 [2020-12-21 21:47:55,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:47:55,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-21 21:47:55,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 199. [2020-12-21 21:47:55,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-21 21:47:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 228 transitions. [2020-12-21 21:47:55,381 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 228 transitions. Word has length 59 [2020-12-21 21:47:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:55,381 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 228 transitions. [2020-12-21 21:47:55,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:47:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 228 transitions. [2020-12-21 21:47:55,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:47:55,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:55,382 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:55,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:47:55,597 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:55,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash 654124313, now seen corresponding path program 27 times [2020-12-21 21:47:55,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:55,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151750594] [2020-12-21 21:47:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151750594] [2020-12-21 21:47:56,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023999458] [2020-12-21 21:47:56,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:56,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-21 21:47:56,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:47:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:56,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:56,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-21 21:47:56,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946677834] [2020-12-21 21:47:56,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:47:56,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:56,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:47:56,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:47:56,725 INFO L87 Difference]: Start difference. First operand 199 states and 228 transitions. Second operand 31 states. [2020-12-21 21:47:57,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:57,023 INFO L93 Difference]: Finished difference Result 406 states and 438 transitions. [2020-12-21 21:47:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:47:57,024 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 61 [2020-12-21 21:47:57,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:57,026 INFO L225 Difference]: With dead ends: 406 [2020-12-21 21:47:57,026 INFO L226 Difference]: Without dead ends: 264 [2020-12-21 21:47:57,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:47:57,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-21 21:47:57,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 206. [2020-12-21 21:47:57,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-21 21:47:57,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 236 transitions. [2020-12-21 21:47:57,033 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 236 transitions. Word has length 61 [2020-12-21 21:47:57,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:57,033 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 236 transitions. [2020-12-21 21:47:57,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:47:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 236 transitions. [2020-12-21 21:47:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:47:57,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:57,034 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:57,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-21 21:47:57,249 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:57,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1101344937, now seen corresponding path program 28 times [2020-12-21 21:47:57,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:57,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352859977] [2020-12-21 21:47:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:57,802 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:57,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352859977] [2020-12-21 21:47:57,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142475830] [2020-12-21 21:47:57,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:57,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:47:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:57,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:47:57,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:57,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:57,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:47:57,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418137995] [2020-12-21 21:47:57,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:47:57,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:57,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:47:57,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:47:57,972 INFO L87 Difference]: Start difference. First operand 206 states and 236 transitions. Second operand 32 states. [2020-12-21 21:47:58,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:47:58,282 INFO L93 Difference]: Finished difference Result 420 states and 453 transitions. [2020-12-21 21:47:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:47:58,282 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2020-12-21 21:47:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:47:58,284 INFO L225 Difference]: With dead ends: 420 [2020-12-21 21:47:58,284 INFO L226 Difference]: Without dead ends: 273 [2020-12-21 21:47:58,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:47:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-21 21:47:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 213. [2020-12-21 21:47:58,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-21 21:47:58,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 244 transitions. [2020-12-21 21:47:58,291 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 244 transitions. Word has length 63 [2020-12-21 21:47:58,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:47:58,292 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 244 transitions. [2020-12-21 21:47:58,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:47:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 244 transitions. [2020-12-21 21:47:58,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:47:58,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:47:58,293 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:47:58,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:47:58,507 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:47:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:47:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash -185146859, now seen corresponding path program 29 times [2020-12-21 21:47:58,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:47:58,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37702057] [2020-12-21 21:47:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:47:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:47:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:59,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37702057] [2020-12-21 21:47:59,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111110186] [2020-12-21 21:47:59,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:47:59,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-21 21:47:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:47:59,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-21 21:47:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:47:59,781 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:47:59,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:47:59,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-21 21:47:59,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054504108] [2020-12-21 21:47:59,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-21 21:47:59,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:47:59,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-21 21:47:59,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:47:59,784 INFO L87 Difference]: Start difference. First operand 213 states and 244 transitions. Second operand 33 states. [2020-12-21 21:48:00,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:00,094 INFO L93 Difference]: Finished difference Result 434 states and 468 transitions. [2020-12-21 21:48:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-21 21:48:00,095 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-21 21:48:00,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:00,096 INFO L225 Difference]: With dead ends: 434 [2020-12-21 21:48:00,097 INFO L226 Difference]: Without dead ends: 282 [2020-12-21 21:48:00,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:48:00,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-21 21:48:00,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 220. [2020-12-21 21:48:00,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-12-21 21:48:00,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 252 transitions. [2020-12-21 21:48:00,103 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 252 transitions. Word has length 65 [2020-12-21 21:48:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:00,103 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 252 transitions. [2020-12-21 21:48:00,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-21 21:48:00,104 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 252 transitions. [2020-12-21 21:48:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-21 21:48:00,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:00,104 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:00,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:00,320 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash -187089581, now seen corresponding path program 30 times [2020-12-21 21:48:00,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:00,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518770450] [2020-12-21 21:48:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:00,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:00,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518770450] [2020-12-21 21:48:00,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159338446] [2020-12-21 21:48:00,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:03,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-21 21:48:03,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:48:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:03,789 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:03,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:03,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:48:03,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115907828] [2020-12-21 21:48:03,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:48:03,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:03,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:48:03,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:48:03,791 INFO L87 Difference]: Start difference. First operand 220 states and 252 transitions. Second operand 34 states. [2020-12-21 21:48:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:04,181 INFO L93 Difference]: Finished difference Result 448 states and 483 transitions. [2020-12-21 21:48:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:48:04,182 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 67 [2020-12-21 21:48:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:04,184 INFO L225 Difference]: With dead ends: 448 [2020-12-21 21:48:04,184 INFO L226 Difference]: Without dead ends: 291 [2020-12-21 21:48:04,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:48:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-21 21:48:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 227. [2020-12-21 21:48:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-21 21:48:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 260 transitions. [2020-12-21 21:48:04,192 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 260 transitions. Word has length 67 [2020-12-21 21:48:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:04,192 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 260 transitions. [2020-12-21 21:48:04,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:48:04,192 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 260 transitions. [2020-12-21 21:48:04,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-21 21:48:04,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:04,193 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:04,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:04,409 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:04,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:04,410 INFO L82 PathProgramCache]: Analyzing trace with hash -2054045423, now seen corresponding path program 31 times [2020-12-21 21:48:04,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:04,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347065254] [2020-12-21 21:48:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347065254] [2020-12-21 21:48:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601501466] [2020-12-21 21:48:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:05,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:48:05,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:05,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:05,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:48:05,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916178531] [2020-12-21 21:48:05,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:48:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:05,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:48:05,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:48:05,167 INFO L87 Difference]: Start difference. First operand 227 states and 260 transitions. Second operand 35 states. [2020-12-21 21:48:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:05,521 INFO L93 Difference]: Finished difference Result 462 states and 498 transitions. [2020-12-21 21:48:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:48:05,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 69 [2020-12-21 21:48:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:05,524 INFO L225 Difference]: With dead ends: 462 [2020-12-21 21:48:05,524 INFO L226 Difference]: Without dead ends: 300 [2020-12-21 21:48:05,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:48:05,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-21 21:48:05,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 234. [2020-12-21 21:48:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-12-21 21:48:05,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 268 transitions. [2020-12-21 21:48:05,534 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 268 transitions. Word has length 69 [2020-12-21 21:48:05,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:05,535 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 268 transitions. [2020-12-21 21:48:05,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:48:05,535 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 268 transitions. [2020-12-21 21:48:05,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:48:05,536 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:05,536 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:05,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:05,749 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:05,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:05,751 INFO L82 PathProgramCache]: Analyzing trace with hash -902279857, now seen corresponding path program 32 times [2020-12-21 21:48:05,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:05,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465098104] [2020-12-21 21:48:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:06,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465098104] [2020-12-21 21:48:06,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927403309] [2020-12-21 21:48:06,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:06,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:06,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:06,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-21 21:48:06,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:06,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:06,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-21 21:48:06,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586816071] [2020-12-21 21:48:06,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-21 21:48:06,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:06,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-21 21:48:06,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:48:06,622 INFO L87 Difference]: Start difference. First operand 234 states and 268 transitions. Second operand 36 states. [2020-12-21 21:48:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:07,010 INFO L93 Difference]: Finished difference Result 476 states and 513 transitions. [2020-12-21 21:48:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-21 21:48:07,011 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 71 [2020-12-21 21:48:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:07,012 INFO L225 Difference]: With dead ends: 476 [2020-12-21 21:48:07,013 INFO L226 Difference]: Without dead ends: 309 [2020-12-21 21:48:07,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-21 21:48:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-21 21:48:07,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 241. [2020-12-21 21:48:07,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-21 21:48:07,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2020-12-21 21:48:07,023 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 71 [2020-12-21 21:48:07,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:07,023 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2020-12-21 21:48:07,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-21 21:48:07,023 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2020-12-21 21:48:07,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-21 21:48:07,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:07,026 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:07,239 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:48:07,239 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:07,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2137833997, now seen corresponding path program 33 times [2020-12-21 21:48:07,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:07,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044182251] [2020-12-21 21:48:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:07,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:08,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044182251] [2020-12-21 21:48:08,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25182342] [2020-12-21 21:48:08,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:17,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-21 21:48:17,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:48:17,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:17,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:17,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:48:17,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122127494] [2020-12-21 21:48:17,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:48:17,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:17,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:48:17,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:48:17,491 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand 37 states. [2020-12-21 21:48:17,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:17,858 INFO L93 Difference]: Finished difference Result 490 states and 528 transitions. [2020-12-21 21:48:17,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:48:17,859 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 73 [2020-12-21 21:48:17,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:17,861 INFO L225 Difference]: With dead ends: 490 [2020-12-21 21:48:17,861 INFO L226 Difference]: Without dead ends: 318 [2020-12-21 21:48:17,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:48:17,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-21 21:48:17,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 248. [2020-12-21 21:48:17,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-12-21 21:48:17,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 284 transitions. [2020-12-21 21:48:17,869 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 284 transitions. Word has length 73 [2020-12-21 21:48:17,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:17,869 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 284 transitions. [2020-12-21 21:48:17,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:48:17,870 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 284 transitions. [2020-12-21 21:48:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-21 21:48:17,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:17,870 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:18,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:18,086 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:18,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1185480885, now seen corresponding path program 34 times [2020-12-21 21:48:18,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:18,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496399080] [2020-12-21 21:48:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:18,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496399080] [2020-12-21 21:48:18,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175977921] [2020-12-21 21:48:18,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:18,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:18,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:48:18,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:19,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:19,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:48:19,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031396669] [2020-12-21 21:48:19,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:48:19,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:19,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:48:19,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:48:19,036 INFO L87 Difference]: Start difference. First operand 248 states and 284 transitions. Second operand 38 states. [2020-12-21 21:48:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:19,442 INFO L93 Difference]: Finished difference Result 504 states and 543 transitions. [2020-12-21 21:48:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:48:19,442 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 75 [2020-12-21 21:48:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:19,444 INFO L225 Difference]: With dead ends: 504 [2020-12-21 21:48:19,444 INFO L226 Difference]: Without dead ends: 327 [2020-12-21 21:48:19,445 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:48:19,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-21 21:48:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2020-12-21 21:48:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-12-21 21:48:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 292 transitions. [2020-12-21 21:48:19,452 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 292 transitions. Word has length 75 [2020-12-21 21:48:19,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:19,452 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 292 transitions. [2020-12-21 21:48:19,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:48:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 292 transitions. [2020-12-21 21:48:19,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:48:19,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:19,453 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:19,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:48:19,669 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:19,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:19,669 INFO L82 PathProgramCache]: Analyzing trace with hash 564585737, now seen corresponding path program 35 times [2020-12-21 21:48:19,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:19,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426275544] [2020-12-21 21:48:19,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:20,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426275544] [2020-12-21 21:48:20,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096956281] [2020-12-21 21:48:20,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:25,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-21 21:48:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:25,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-21 21:48:25,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:25,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-21 21:48:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618681918] [2020-12-21 21:48:25,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-21 21:48:25,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-21 21:48:25,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:48:25,707 INFO L87 Difference]: Start difference. First operand 255 states and 292 transitions. Second operand 39 states. [2020-12-21 21:48:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:26,109 INFO L93 Difference]: Finished difference Result 518 states and 558 transitions. [2020-12-21 21:48:26,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:48:26,110 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 77 [2020-12-21 21:48:26,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:26,112 INFO L225 Difference]: With dead ends: 518 [2020-12-21 21:48:26,112 INFO L226 Difference]: Without dead ends: 336 [2020-12-21 21:48:26,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-21 21:48:26,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-12-21 21:48:26,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2020-12-21 21:48:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-21 21:48:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2020-12-21 21:48:26,120 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 77 [2020-12-21 21:48:26,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:26,120 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2020-12-21 21:48:26,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-21 21:48:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2020-12-21 21:48:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:48:26,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:26,121 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:26,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:26,336 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:26,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1248570553, now seen corresponding path program 36 times [2020-12-21 21:48:26,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:26,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147689501] [2020-12-21 21:48:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:27,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:27,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147689501] [2020-12-21 21:48:27,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420859826] [2020-12-21 21:48:27,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:09,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-21 21:49:09,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:09,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:49:09,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:09,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:09,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:49:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285992848] [2020-12-21 21:49:09,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:49:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:49:09,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:49:09,600 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 40 states. [2020-12-21 21:49:09,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:09,996 INFO L93 Difference]: Finished difference Result 532 states and 573 transitions. [2020-12-21 21:49:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:49:09,997 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 79 [2020-12-21 21:49:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:10,000 INFO L225 Difference]: With dead ends: 532 [2020-12-21 21:49:10,000 INFO L226 Difference]: Without dead ends: 345 [2020-12-21 21:49:10,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:49:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-12-21 21:49:10,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 269. [2020-12-21 21:49:10,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-21 21:49:10,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 308 transitions. [2020-12-21 21:49:10,008 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 308 transitions. Word has length 79 [2020-12-21 21:49:10,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:10,008 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 308 transitions. [2020-12-21 21:49:10,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:49:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 308 transitions. [2020-12-21 21:49:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:49:10,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:10,009 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:10,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:49:10,223 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash 64956933, now seen corresponding path program 37 times [2020-12-21 21:49:10,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:10,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578394039] [2020-12-21 21:49:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:11,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578394039] [2020-12-21 21:49:11,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387624411] [2020-12-21 21:49:11,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:11,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:49:11,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:11,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:11,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:49:11,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111632664] [2020-12-21 21:49:11,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:49:11,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:49:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:49:11,350 INFO L87 Difference]: Start difference. First operand 269 states and 308 transitions. Second operand 41 states. [2020-12-21 21:49:11,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:11,760 INFO L93 Difference]: Finished difference Result 546 states and 588 transitions. [2020-12-21 21:49:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:49:11,760 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 81 [2020-12-21 21:49:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:11,763 INFO L225 Difference]: With dead ends: 546 [2020-12-21 21:49:11,763 INFO L226 Difference]: Without dead ends: 354 [2020-12-21 21:49:11,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:49:11,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-21 21:49:11,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2020-12-21 21:49:11,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-12-21 21:49:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 316 transitions. [2020-12-21 21:49:11,771 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 316 transitions. Word has length 81 [2020-12-21 21:49:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:11,771 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 316 transitions. [2020-12-21 21:49:11,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:49:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 316 transitions. [2020-12-21 21:49:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:49:11,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:11,772 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:11,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:49:11,985 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:11,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:11,986 INFO L82 PathProgramCache]: Analyzing trace with hash -355514045, now seen corresponding path program 38 times [2020-12-21 21:49:11,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:11,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671122510] [2020-12-21 21:49:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:12,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671122510] [2020-12-21 21:49:12,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056462365] [2020-12-21 21:49:12,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:13,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:49:13,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-21 21:49:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:13,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:13,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-21 21:49:13,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019601435] [2020-12-21 21:49:13,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:49:13,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:13,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:49:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:49:13,125 INFO L87 Difference]: Start difference. First operand 276 states and 316 transitions. Second operand 42 states. [2020-12-21 21:49:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:13,573 INFO L93 Difference]: Finished difference Result 560 states and 603 transitions. [2020-12-21 21:49:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-21 21:49:13,573 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2020-12-21 21:49:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:13,575 INFO L225 Difference]: With dead ends: 560 [2020-12-21 21:49:13,575 INFO L226 Difference]: Without dead ends: 363 [2020-12-21 21:49:13,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:49:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-12-21 21:49:13,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 283. [2020-12-21 21:49:13,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-21 21:49:13,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 324 transitions. [2020-12-21 21:49:13,584 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 324 transitions. Word has length 83 [2020-12-21 21:49:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:13,584 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 324 transitions. [2020-12-21 21:49:13,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:49:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 324 transitions. [2020-12-21 21:49:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-21 21:49:13,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:13,586 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:13,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:49:13,799 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:13,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash -701198079, now seen corresponding path program 39 times [2020-12-21 21:49:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:13,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669288572] [2020-12-21 21:49:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669288572] [2020-12-21 21:49:14,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840400030] [2020-12-21 21:49:14,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:45,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-21 21:49:45,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:49:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:45,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:45,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:49:45,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416403584] [2020-12-21 21:49:45,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:49:45,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:45,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:49:45,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:49:45,282 INFO L87 Difference]: Start difference. First operand 283 states and 324 transitions. Second operand 43 states. [2020-12-21 21:49:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:45,708 INFO L93 Difference]: Finished difference Result 574 states and 618 transitions. [2020-12-21 21:49:45,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:49:45,708 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 85 [2020-12-21 21:49:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:45,711 INFO L225 Difference]: With dead ends: 574 [2020-12-21 21:49:45,711 INFO L226 Difference]: Without dead ends: 372 [2020-12-21 21:49:45,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:49:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2020-12-21 21:49:45,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 290. [2020-12-21 21:49:45,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2020-12-21 21:49:45,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 332 transitions. [2020-12-21 21:49:45,721 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 332 transitions. Word has length 85 [2020-12-21 21:49:45,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:45,721 INFO L481 AbstractCegarLoop]: Abstraction has 290 states and 332 transitions. [2020-12-21 21:49:45,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:49:45,722 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 332 transitions. [2020-12-21 21:49:45,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-21 21:49:45,722 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:45,723 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:45,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:49:45,936 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:45,937 INFO L82 PathProgramCache]: Analyzing trace with hash 2103894335, now seen corresponding path program 40 times [2020-12-21 21:49:45,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:45,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321535316] [2020-12-21 21:49:45,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:47,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321535316] [2020-12-21 21:49:47,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849059996] [2020-12-21 21:49:47,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:47,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:49:47,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:47,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:49:47,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:47,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:47,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:49:47,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17825705] [2020-12-21 21:49:47,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:49:47,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:47,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:49:47,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:49:47,228 INFO L87 Difference]: Start difference. First operand 290 states and 332 transitions. Second operand 44 states. [2020-12-21 21:49:47,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:47,727 INFO L93 Difference]: Finished difference Result 588 states and 633 transitions. [2020-12-21 21:49:47,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:49:47,728 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 87 [2020-12-21 21:49:47,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:47,730 INFO L225 Difference]: With dead ends: 588 [2020-12-21 21:49:47,731 INFO L226 Difference]: Without dead ends: 381 [2020-12-21 21:49:47,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:49:47,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-12-21 21:49:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 297. [2020-12-21 21:49:47,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-21 21:49:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 340 transitions. [2020-12-21 21:49:47,738 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 340 transitions. Word has length 87 [2020-12-21 21:49:47,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:47,738 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 340 transitions. [2020-12-21 21:49:47,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:49:47,739 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 340 transitions. [2020-12-21 21:49:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-21 21:49:47,739 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:47,740 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:47,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:47,953 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 558242301, now seen corresponding path program 41 times [2020-12-21 21:49:47,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:47,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012235386] [2020-12-21 21:49:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:47,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012235386] [2020-12-21 21:49:49,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354382997] [2020-12-21 21:49:49,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:49:55,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-21 21:49:55,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:49:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-21 21:49:55,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:49:55,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:49:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-21 21:49:55,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448184651] [2020-12-21 21:49:55,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-21 21:49:55,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:49:55,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-21 21:49:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:49:55,470 INFO L87 Difference]: Start difference. First operand 297 states and 340 transitions. Second operand 45 states. [2020-12-21 21:49:55,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:49:55,961 INFO L93 Difference]: Finished difference Result 602 states and 648 transitions. [2020-12-21 21:49:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-21 21:49:55,962 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 89 [2020-12-21 21:49:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:49:55,964 INFO L225 Difference]: With dead ends: 602 [2020-12-21 21:49:55,964 INFO L226 Difference]: Without dead ends: 390 [2020-12-21 21:49:55,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-21 21:49:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-12-21 21:49:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 304. [2020-12-21 21:49:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-21 21:49:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 348 transitions. [2020-12-21 21:49:55,972 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 348 transitions. Word has length 89 [2020-12-21 21:49:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:49:55,973 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 348 transitions. [2020-12-21 21:49:55,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-21 21:49:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 348 transitions. [2020-12-21 21:49:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-21 21:49:55,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:49:55,974 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:49:56,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-21 21:49:56,188 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:49:56,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:49:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1245322043, now seen corresponding path program 42 times [2020-12-21 21:49:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:49:56,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100970937] [2020-12-21 21:49:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:49:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:49:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:49:57,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100970937] [2020-12-21 21:49:57,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138016374] [2020-12-21 21:49:57,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:40,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-21 21:51:40,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:51:40,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:40,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:40,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:51:40,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137935615] [2020-12-21 21:51:40,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:51:40,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:40,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:51:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:51:40,652 INFO L87 Difference]: Start difference. First operand 304 states and 348 transitions. Second operand 46 states. [2020-12-21 21:51:41,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:41,234 INFO L93 Difference]: Finished difference Result 616 states and 663 transitions. [2020-12-21 21:51:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:51:41,235 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 91 [2020-12-21 21:51:41,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:41,237 INFO L225 Difference]: With dead ends: 616 [2020-12-21 21:51:41,237 INFO L226 Difference]: Without dead ends: 399 [2020-12-21 21:51:41,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:51:41,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-12-21 21:51:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 311. [2020-12-21 21:51:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-12-21 21:51:41,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 356 transitions. [2020-12-21 21:51:41,245 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 356 transitions. Word has length 91 [2020-12-21 21:51:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:41,246 INFO L481 AbstractCegarLoop]: Abstraction has 311 states and 356 transitions. [2020-12-21 21:51:41,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:51:41,246 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 356 transitions. [2020-12-21 21:51:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-21 21:51:41,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:41,247 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:41,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:41,448 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:41,449 INFO L82 PathProgramCache]: Analyzing trace with hash 103990521, now seen corresponding path program 43 times [2020-12-21 21:51:41,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:41,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287004561] [2020-12-21 21:51:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:41,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287004561] [2020-12-21 21:51:42,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685048086] [2020-12-21 21:51:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:42,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:51:42,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:42,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:42,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:51:42,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477806307] [2020-12-21 21:51:42,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:51:42,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:51:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:51:42,838 INFO L87 Difference]: Start difference. First operand 311 states and 356 transitions. Second operand 47 states. [2020-12-21 21:51:43,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:43,397 INFO L93 Difference]: Finished difference Result 630 states and 678 transitions. [2020-12-21 21:51:43,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:51:43,397 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 93 [2020-12-21 21:51:43,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:43,400 INFO L225 Difference]: With dead ends: 630 [2020-12-21 21:51:43,400 INFO L226 Difference]: Without dead ends: 408 [2020-12-21 21:51:43,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:51:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-12-21 21:51:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 318. [2020-12-21 21:51:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-21 21:51:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 364 transitions. [2020-12-21 21:51:43,407 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 364 transitions. Word has length 93 [2020-12-21 21:51:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:43,408 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 364 transitions. [2020-12-21 21:51:43,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:51:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 364 transitions. [2020-12-21 21:51:43,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:51:43,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:43,409 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:43,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:43,625 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:43,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1498941641, now seen corresponding path program 44 times [2020-12-21 21:51:43,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:43,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510986006] [2020-12-21 21:51:43,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:43,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:44,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510986006] [2020-12-21 21:51:44,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739458911] [2020-12-21 21:51:44,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:51:44,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:51:44,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:51:44,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-21 21:51:44,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:51:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:45,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:51:45,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-21 21:51:45,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327266715] [2020-12-21 21:51:45,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-21 21:51:45,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:51:45,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-21 21:51:45,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:51:45,073 INFO L87 Difference]: Start difference. First operand 318 states and 364 transitions. Second operand 48 states. [2020-12-21 21:51:45,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:51:45,700 INFO L93 Difference]: Finished difference Result 644 states and 693 transitions. [2020-12-21 21:51:45,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-21 21:51:45,700 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 95 [2020-12-21 21:51:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:51:45,703 INFO L225 Difference]: With dead ends: 644 [2020-12-21 21:51:45,703 INFO L226 Difference]: Without dead ends: 417 [2020-12-21 21:51:45,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-21 21:51:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-21 21:51:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 325. [2020-12-21 21:51:45,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-21 21:51:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 372 transitions. [2020-12-21 21:51:45,710 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 372 transitions. Word has length 95 [2020-12-21 21:51:45,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:51:45,711 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 372 transitions. [2020-12-21 21:51:45,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-21 21:51:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 372 transitions. [2020-12-21 21:51:45,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:51:45,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:51:45,711 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:51:45,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:51:45,926 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:51:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:51:45,927 INFO L82 PathProgramCache]: Analyzing trace with hash -23490059, now seen corresponding path program 45 times [2020-12-21 21:51:45,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:51:45,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537929871] [2020-12-21 21:51:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:51:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:51:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:51:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537929871] [2020-12-21 21:51:47,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563161833] [2020-12-21 21:51:47,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true