/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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:41:39,621 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:41:39,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:41:39,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:41:39,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:41:39,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:41:39,769 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:41:39,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:41:39,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:41:39,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:41:39,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:41:39,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:41:39,808 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:41:39,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:41:39,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:41:39,809 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:41:39,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:41:39,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:41:39,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:41:39,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:41:39,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:41:39,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:41:39,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:41:39,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:41:39,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:41:39,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:41:39,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:41:39,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:41:39,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:41:39,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:41:39,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:41:39,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:41:39,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:41:39,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:41:40,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:41:40,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:41:40,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:41:40,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:41:40,353 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:41:40,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:41:40,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7864d8d/3f2e3791da7241cc9e29a345c4be627f/FLAGa67af13f6 [2020-12-22 08:41:41,285 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:41:41,286 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:41:41,304 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7864d8d/3f2e3791da7241cc9e29a345c4be627f/FLAGa67af13f6 [2020-12-22 08:41:41,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b7864d8d/3f2e3791da7241cc9e29a345c4be627f [2020-12-22 08:41:41,534 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:41:41,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:41:41,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:41:41,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:41:41,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:41:41,549 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:41:41" (1/1) ... [2020-12-22 08:41:41,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23f46a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:41, skipping insertion in model container [2020-12-22 08:41:41,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:41:41" (1/1) ... [2020-12-22 08:41:41,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:41:41,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:41:41,918 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6234,6247] [2020-12-22 08:41:41,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:41:42,023 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:41:42,100 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/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[6234,6247] [2020-12-22 08:41:42,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:41:42,167 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:41:42,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42 WrapperNode [2020-12-22 08:41:42,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:41:42,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:41:42,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:41:42,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:41:42,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,198 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:41:42,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:41:42,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:41:42,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:41:42,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (1/1) ... [2020-12-22 08:41:42,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:41:42,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:41:42,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:41:42,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:41:42,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (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 [2020-12-22 08:41:42,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:41:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:41:42,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:41:42,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:41:43,782 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:41:43,786 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:41:43,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:41:43 BoogieIcfgContainer [2020-12-22 08:41:43,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:41:43,800 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:41:43,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:41:43,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:41:43,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:41:41" (1/3) ... [2020-12-22 08:41:43,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fbf45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:41:43, skipping insertion in model container [2020-12-22 08:41:43,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:41:42" (2/3) ... [2020-12-22 08:41:43,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50fbf45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:41:43, skipping insertion in model container [2020-12-22 08:41:43,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:41:43" (3/3) ... [2020-12-22 08:41:43,818 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-12-22 08:41:43,830 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:41:43,845 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:41:43,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:41:43,934 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:41:43,935 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:41:43,935 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:41:43,935 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:41:43,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:41:43,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:41:43,936 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:41:43,936 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:41:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states. [2020-12-22 08:41:43,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:41:43,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:43,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:43,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1503533793, now seen corresponding path program 1 times [2020-12-22 08:41:43,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:43,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445254512] [2020-12-22 08:41:43,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:44,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445254512] [2020-12-22 08:41:44,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:44,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:41:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586042760] [2020-12-22 08:41:44,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:41:44,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:41:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:41:44,569 INFO L87 Difference]: Start difference. First operand 123 states. Second operand 3 states. [2020-12-22 08:41:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:44,743 INFO L93 Difference]: Finished difference Result 245 states and 401 transitions. [2020-12-22 08:41:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:41:44,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 61 [2020-12-22 08:41:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:44,762 INFO L225 Difference]: With dead ends: 245 [2020-12-22 08:41:44,762 INFO L226 Difference]: Without dead ends: 184 [2020-12-22 08:41:44,767 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 [2020-12-22 08:41:44,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-22 08:41:44,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-12-22 08:41:44,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 08:41:44,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 263 transitions. [2020-12-22 08:41:44,839 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 263 transitions. Word has length 61 [2020-12-22 08:41:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:44,840 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 263 transitions. [2020-12-22 08:41:44,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:41:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 263 transitions. [2020-12-22 08:41:44,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:41:44,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:44,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:44,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:41:44,845 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:44,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:44,846 INFO L82 PathProgramCache]: Analyzing trace with hash -886934908, now seen corresponding path program 1 times [2020-12-22 08:41:44,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:44,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458496713] [2020-12-22 08:41:44,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:45,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458496713] [2020-12-22 08:41:45,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:45,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:41:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841736443] [2020-12-22 08:41:45,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:41:45,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:41:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:41:45,135 INFO L87 Difference]: Start difference. First operand 182 states and 263 transitions. Second operand 5 states. [2020-12-22 08:41:45,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:45,570 INFO L93 Difference]: Finished difference Result 460 states and 692 transitions. [2020-12-22 08:41:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:41:45,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:41:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:45,574 INFO L225 Difference]: With dead ends: 460 [2020-12-22 08:41:45,575 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 08:41:45,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:41:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 08:41:45,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2020-12-22 08:41:45,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-12-22 08:41:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 455 transitions. [2020-12-22 08:41:45,659 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 455 transitions. Word has length 63 [2020-12-22 08:41:45,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:45,662 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 455 transitions. [2020-12-22 08:41:45,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:41:45,663 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 455 transitions. [2020-12-22 08:41:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:41:45,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:45,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:45,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:41:45,669 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:45,672 INFO L82 PathProgramCache]: Analyzing trace with hash 802634649, now seen corresponding path program 1 times [2020-12-22 08:41:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:45,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554813935] [2020-12-22 08:41:45,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:45,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:45,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:45,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554813935] [2020-12-22 08:41:45,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:45,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:41:45,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383296619] [2020-12-22 08:41:45,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:45,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:45,987 INFO L87 Difference]: Start difference. First operand 305 states and 455 transitions. Second operand 6 states. [2020-12-22 08:41:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:46,387 INFO L93 Difference]: Finished difference Result 763 states and 1167 transitions. [2020-12-22 08:41:46,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:41:46,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-12-22 08:41:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:46,394 INFO L225 Difference]: With dead ends: 763 [2020-12-22 08:41:46,394 INFO L226 Difference]: Without dead ends: 499 [2020-12-22 08:41:46,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-12-22 08:41:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 497. [2020-12-22 08:41:46,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-12-22 08:41:46,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 750 transitions. [2020-12-22 08:41:46,456 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 750 transitions. Word has length 64 [2020-12-22 08:41:46,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:46,457 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 750 transitions. [2020-12-22 08:41:46,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:46,457 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 750 transitions. [2020-12-22 08:41:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:41:46,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:46,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:46,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:41:46,461 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:46,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:46,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1237540328, now seen corresponding path program 1 times [2020-12-22 08:41:46,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:46,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309604225] [2020-12-22 08:41:46,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:46,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:46,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309604225] [2020-12-22 08:41:46,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:46,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:41:46,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949447131] [2020-12-22 08:41:46,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:41:46,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:46,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:41:46,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:41:46,602 INFO L87 Difference]: Start difference. First operand 497 states and 750 transitions. Second operand 5 states. [2020-12-22 08:41:46,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:46,859 INFO L93 Difference]: Finished difference Result 957 states and 1461 transitions. [2020-12-22 08:41:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:41:46,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-12-22 08:41:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:46,865 INFO L225 Difference]: With dead ends: 957 [2020-12-22 08:41:46,866 INFO L226 Difference]: Without dead ends: 497 [2020-12-22 08:41:46,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:41:46,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-12-22 08:41:46,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2020-12-22 08:41:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-12-22 08:41:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 741 transitions. [2020-12-22 08:41:46,926 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 741 transitions. Word has length 65 [2020-12-22 08:41:46,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:46,926 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 741 transitions. [2020-12-22 08:41:46,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:41:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 741 transitions. [2020-12-22 08:41:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 08:41:46,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:46,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:46,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:41:46,935 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2023216621, now seen corresponding path program 1 times [2020-12-22 08:41:46,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:46,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950526942] [2020-12-22 08:41:46,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:47,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:47,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950526942] [2020-12-22 08:41:47,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:47,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:41:47,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815737610] [2020-12-22 08:41:47,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:41:47,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:47,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:41:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:41:47,139 INFO L87 Difference]: Start difference. First operand 497 states and 741 transitions. Second operand 5 states. [2020-12-22 08:41:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:47,387 INFO L93 Difference]: Finished difference Result 961 states and 1448 transitions. [2020-12-22 08:41:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:41:47,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-12-22 08:41:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:47,392 INFO L225 Difference]: With dead ends: 961 [2020-12-22 08:41:47,392 INFO L226 Difference]: Without dead ends: 497 [2020-12-22 08:41:47,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:41:47,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2020-12-22 08:41:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 497. [2020-12-22 08:41:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497 states. [2020-12-22 08:41:47,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 732 transitions. [2020-12-22 08:41:47,456 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 732 transitions. Word has length 66 [2020-12-22 08:41:47,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:47,457 INFO L481 AbstractCegarLoop]: Abstraction has 497 states and 732 transitions. [2020-12-22 08:41:47,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:41:47,458 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 732 transitions. [2020-12-22 08:41:47,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:47,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:47,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:47,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:41:47,461 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:47,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1272574804, now seen corresponding path program 1 times [2020-12-22 08:41:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:47,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703788799] [2020-12-22 08:41:47,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703788799] [2020-12-22 08:41:47,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:47,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:41:47,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575611720] [2020-12-22 08:41:47,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:47,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:47,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:47,625 INFO L87 Difference]: Start difference. First operand 497 states and 732 transitions. Second operand 6 states. [2020-12-22 08:41:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:47,972 INFO L93 Difference]: Finished difference Result 2125 states and 3203 transitions. [2020-12-22 08:41:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:47,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:41:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:47,996 INFO L225 Difference]: With dead ends: 2125 [2020-12-22 08:41:47,996 INFO L226 Difference]: Without dead ends: 1743 [2020-12-22 08:41:47,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2020-12-22 08:41:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 695. [2020-12-22 08:41:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-12-22 08:41:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1036 transitions. [2020-12-22 08:41:48,133 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1036 transitions. Word has length 67 [2020-12-22 08:41:48,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:48,133 INFO L481 AbstractCegarLoop]: Abstraction has 695 states and 1036 transitions. [2020-12-22 08:41:48,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1036 transitions. [2020-12-22 08:41:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:48,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:48,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:48,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:41:48,137 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:48,140 INFO L82 PathProgramCache]: Analyzing trace with hash 112254648, now seen corresponding path program 1 times [2020-12-22 08:41:48,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:48,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34160047] [2020-12-22 08:41:48,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:48,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34160047] [2020-12-22 08:41:48,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:48,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:41:48,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052261254] [2020-12-22 08:41:48,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:48,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:48,364 INFO L87 Difference]: Start difference. First operand 695 states and 1036 transitions. Second operand 6 states. [2020-12-22 08:41:48,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:48,796 INFO L93 Difference]: Finished difference Result 2299 states and 3469 transitions. [2020-12-22 08:41:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:48,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:41:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:48,813 INFO L225 Difference]: With dead ends: 2299 [2020-12-22 08:41:48,814 INFO L226 Difference]: Without dead ends: 1917 [2020-12-22 08:41:48,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:48,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2020-12-22 08:41:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1107. [2020-12-22 08:41:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1107 states. [2020-12-22 08:41:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1666 transitions. [2020-12-22 08:41:49,027 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1666 transitions. Word has length 67 [2020-12-22 08:41:49,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:49,029 INFO L481 AbstractCegarLoop]: Abstraction has 1107 states and 1666 transitions. [2020-12-22 08:41:49,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:49,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1666 transitions. [2020-12-22 08:41:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:49,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:49,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:49,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:41:49,031 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:49,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash 943476066, now seen corresponding path program 1 times [2020-12-22 08:41:49,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:49,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96562109] [2020-12-22 08:41:49,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:49,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96562109] [2020-12-22 08:41:49,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:49,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:41:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685798292] [2020-12-22 08:41:49,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:41:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:41:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:41:49,138 INFO L87 Difference]: Start difference. First operand 1107 states and 1666 transitions. Second operand 3 states. [2020-12-22 08:41:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:49,553 INFO L93 Difference]: Finished difference Result 2947 states and 4448 transitions. [2020-12-22 08:41:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:41:49,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 08:41:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:49,569 INFO L225 Difference]: With dead ends: 2947 [2020-12-22 08:41:49,569 INFO L226 Difference]: Without dead ends: 1971 [2020-12-22 08:41:49,574 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 [2020-12-22 08:41:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2020-12-22 08:41:49,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1929. [2020-12-22 08:41:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1929 states. [2020-12-22 08:41:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2862 transitions. [2020-12-22 08:41:49,915 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2862 transitions. Word has length 67 [2020-12-22 08:41:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:49,916 INFO L481 AbstractCegarLoop]: Abstraction has 1929 states and 2862 transitions. [2020-12-22 08:41:49,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:41:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2862 transitions. [2020-12-22 08:41:49,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:49,917 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:49,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:49,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:41:49,918 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:49,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1116055329, now seen corresponding path program 1 times [2020-12-22 08:41:49,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:49,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777192968] [2020-12-22 08:41:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777192968] [2020-12-22 08:41:50,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:50,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:41:50,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126908712] [2020-12-22 08:41:50,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:41:50,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:41:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:41:50,069 INFO L87 Difference]: Start difference. First operand 1929 states and 2862 transitions. Second operand 3 states. [2020-12-22 08:41:50,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:50,612 INFO L93 Difference]: Finished difference Result 4809 states and 7160 transitions. [2020-12-22 08:41:50,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:41:50,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 67 [2020-12-22 08:41:50,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:50,633 INFO L225 Difference]: With dead ends: 4809 [2020-12-22 08:41:50,633 INFO L226 Difference]: Without dead ends: 3011 [2020-12-22 08:41:50,639 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 [2020-12-22 08:41:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3011 states. [2020-12-22 08:41:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3011 to 3009. [2020-12-22 08:41:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3009 states. [2020-12-22 08:41:51,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4438 transitions. [2020-12-22 08:41:51,082 INFO L78 Accepts]: Start accepts. Automaton has 3009 states and 4438 transitions. Word has length 67 [2020-12-22 08:41:51,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:51,082 INFO L481 AbstractCegarLoop]: Abstraction has 3009 states and 4438 transitions. [2020-12-22 08:41:51,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:41:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3009 states and 4438 transitions. [2020-12-22 08:41:51,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:51,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:51,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:51,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:41:51,085 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:51,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:51,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1891365172, now seen corresponding path program 1 times [2020-12-22 08:41:51,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:51,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101229326] [2020-12-22 08:41:51,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:51,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101229326] [2020-12-22 08:41:51,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:51,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:41:51,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034685287] [2020-12-22 08:41:51,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:51,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:51,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:51,266 INFO L87 Difference]: Start difference. First operand 3009 states and 4438 transitions. Second operand 6 states. [2020-12-22 08:41:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:52,235 INFO L93 Difference]: Finished difference Result 7151 states and 10583 transitions. [2020-12-22 08:41:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:52,236 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:41:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:52,280 INFO L225 Difference]: With dead ends: 7151 [2020-12-22 08:41:52,280 INFO L226 Difference]: Without dead ends: 6085 [2020-12-22 08:41:52,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2020-12-22 08:41:52,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 3752. [2020-12-22 08:41:52,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3752 states. [2020-12-22 08:41:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3752 states to 3752 states and 5538 transitions. [2020-12-22 08:41:52,836 INFO L78 Accepts]: Start accepts. Automaton has 3752 states and 5538 transitions. Word has length 67 [2020-12-22 08:41:52,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:52,837 INFO L481 AbstractCegarLoop]: Abstraction has 3752 states and 5538 transitions. [2020-12-22 08:41:52,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3752 states and 5538 transitions. [2020-12-22 08:41:52,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 08:41:52,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:52,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:52,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:41:52,840 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:52,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:52,841 INFO L82 PathProgramCache]: Analyzing trace with hash 2078718872, now seen corresponding path program 1 times [2020-12-22 08:41:52,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:52,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091131409] [2020-12-22 08:41:52,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:53,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091131409] [2020-12-22 08:41:53,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:53,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 08:41:53,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887875730] [2020-12-22 08:41:53,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 08:41:53,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:53,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 08:41:53,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:41:53,068 INFO L87 Difference]: Start difference. First operand 3752 states and 5538 transitions. Second operand 6 states. [2020-12-22 08:41:54,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:54,100 INFO L93 Difference]: Finished difference Result 7833 states and 11595 transitions. [2020-12-22 08:41:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:41:54,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-12-22 08:41:54,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:54,147 INFO L225 Difference]: With dead ends: 7833 [2020-12-22 08:41:54,148 INFO L226 Difference]: Without dead ends: 6767 [2020-12-22 08:41:54,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 08:41:54,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2020-12-22 08:41:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 4488. [2020-12-22 08:41:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4488 states. [2020-12-22 08:41:54,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6628 transitions. [2020-12-22 08:41:54,748 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6628 transitions. Word has length 67 [2020-12-22 08:41:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:54,748 INFO L481 AbstractCegarLoop]: Abstraction has 4488 states and 6628 transitions. [2020-12-22 08:41:54,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 08:41:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6628 transitions. [2020-12-22 08:41:54,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-22 08:41:54,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:54,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:54,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:41:54,752 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -654863315, now seen corresponding path program 1 times [2020-12-22 08:41:54,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:54,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946993686] [2020-12-22 08:41:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:55,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946993686] [2020-12-22 08:41:55,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:55,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:41:55,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17455343] [2020-12-22 08:41:55,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:41:55,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:55,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:41:55,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:41:55,128 INFO L87 Difference]: Start difference. First operand 4488 states and 6628 transitions. Second operand 10 states. [2020-12-22 08:41:57,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:41:57,438 INFO L93 Difference]: Finished difference Result 13486 states and 19839 transitions. [2020-12-22 08:41:57,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 08:41:57,439 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-12-22 08:41:57,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:41:57,483 INFO L225 Difference]: With dead ends: 13486 [2020-12-22 08:41:57,484 INFO L226 Difference]: Without dead ends: 9100 [2020-12-22 08:41:57,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-12-22 08:41:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9100 states. [2020-12-22 08:41:58,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9100 to 4488. [2020-12-22 08:41:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4488 states. [2020-12-22 08:41:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6625 transitions. [2020-12-22 08:41:58,338 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6625 transitions. Word has length 68 [2020-12-22 08:41:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:41:58,338 INFO L481 AbstractCegarLoop]: Abstraction has 4488 states and 6625 transitions. [2020-12-22 08:41:58,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:41:58,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6625 transitions. [2020-12-22 08:41:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:41:58,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:41:58,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:41:58,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:41:58,341 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:41:58,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:41:58,342 INFO L82 PathProgramCache]: Analyzing trace with hash 302063151, now seen corresponding path program 1 times [2020-12-22 08:41:58,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:41:58,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346444376] [2020-12-22 08:41:58,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:41:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:41:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:41:58,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346444376] [2020-12-22 08:41:58,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:41:58,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 08:41:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64428055] [2020-12-22 08:41:58,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 08:41:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:41:58,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 08:41:58,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-22 08:41:58,574 INFO L87 Difference]: Start difference. First operand 4488 states and 6625 transitions. Second operand 9 states. [2020-12-22 08:42:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:00,013 INFO L93 Difference]: Finished difference Result 11046 states and 16327 transitions. [2020-12-22 08:42:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 08:42:00,014 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-12-22 08:42:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:00,042 INFO L225 Difference]: With dead ends: 11046 [2020-12-22 08:42:00,042 INFO L226 Difference]: Without dead ends: 6676 [2020-12-22 08:42:00,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:42:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6676 states. [2020-12-22 08:42:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6676 to 4488. [2020-12-22 08:42:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4488 states. [2020-12-22 08:42:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6624 transitions. [2020-12-22 08:42:00,701 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6624 transitions. Word has length 69 [2020-12-22 08:42:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:00,702 INFO L481 AbstractCegarLoop]: Abstraction has 4488 states and 6624 transitions. [2020-12-22 08:42:00,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 08:42:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6624 transitions. [2020-12-22 08:42:00,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 08:42:00,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:00,704 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:00,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:42:00,704 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:00,705 INFO L82 PathProgramCache]: Analyzing trace with hash 770281693, now seen corresponding path program 1 times [2020-12-22 08:42:00,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:00,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463378678] [2020-12-22 08:42:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:00,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:42:00,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463378678] [2020-12-22 08:42:00,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:00,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:42:00,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977912959] [2020-12-22 08:42:00,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:42:00,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:42:00,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:42:00,891 INFO L87 Difference]: Start difference. First operand 4488 states and 6624 transitions. Second operand 10 states. [2020-12-22 08:42:02,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:02,925 INFO L93 Difference]: Finished difference Result 13437 states and 19784 transitions. [2020-12-22 08:42:02,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:42:02,925 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-22 08:42:02,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:02,955 INFO L225 Difference]: With dead ends: 13437 [2020-12-22 08:42:02,956 INFO L226 Difference]: Without dead ends: 9066 [2020-12-22 08:42:02,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:42:02,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2020-12-22 08:42:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 4488. [2020-12-22 08:42:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4488 states. [2020-12-22 08:42:03,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6618 transitions. [2020-12-22 08:42:03,604 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6618 transitions. Word has length 69 [2020-12-22 08:42:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:03,604 INFO L481 AbstractCegarLoop]: Abstraction has 4488 states and 6618 transitions. [2020-12-22 08:42:03,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:42:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6618 transitions. [2020-12-22 08:42:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 08:42:03,606 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:03,606 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:03,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:42:03,607 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:03,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2136147335, now seen corresponding path program 1 times [2020-12-22 08:42:03,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:03,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434902623] [2020-12-22 08:42:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:42:03,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434902623] [2020-12-22 08:42:03,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:03,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 08:42:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973154410] [2020-12-22 08:42:03,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 08:42:03,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:03,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 08:42:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 08:42:03,830 INFO L87 Difference]: Start difference. First operand 4488 states and 6618 transitions. Second operand 10 states. [2020-12-22 08:42:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:06,230 INFO L93 Difference]: Finished difference Result 13386 states and 19700 transitions. [2020-12-22 08:42:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 08:42:06,231 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-12-22 08:42:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:06,259 INFO L225 Difference]: With dead ends: 13386 [2020-12-22 08:42:06,259 INFO L226 Difference]: Without dead ends: 9051 [2020-12-22 08:42:06,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-12-22 08:42:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9051 states. [2020-12-22 08:42:07,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9051 to 4488. [2020-12-22 08:42:07,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4488 states. [2020-12-22 08:42:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4488 states to 4488 states and 6609 transitions. [2020-12-22 08:42:07,057 INFO L78 Accepts]: Start accepts. Automaton has 4488 states and 6609 transitions. Word has length 70 [2020-12-22 08:42:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:07,058 INFO L481 AbstractCegarLoop]: Abstraction has 4488 states and 6609 transitions. [2020-12-22 08:42:07,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 08:42:07,058 INFO L276 IsEmpty]: Start isEmpty. Operand 4488 states and 6609 transitions. [2020-12-22 08:42:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:42:07,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:07,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:07,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:42:07,060 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:07,060 INFO L82 PathProgramCache]: Analyzing trace with hash -425050317, now seen corresponding path program 1 times [2020-12-22 08:42:07,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:07,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269935131] [2020-12-22 08:42:07,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:08,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:42:08,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269935131] [2020-12-22 08:42:08,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:08,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:42:08,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730158270] [2020-12-22 08:42:08,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:42:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:42:08,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:42:08,596 INFO L87 Difference]: Start difference. First operand 4488 states and 6609 transitions. Second operand 28 states. [2020-12-22 08:42:08,975 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 94 [2020-12-22 08:42:09,706 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-12-22 08:42:09,880 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-12-22 08:42:10,209 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-12-22 08:42:10,453 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-22 08:42:10,742 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-12-22 08:42:11,049 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 80 [2020-12-22 08:42:11,429 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 89 [2020-12-22 08:42:11,848 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2020-12-22 08:42:12,358 WARN L197 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 107 [2020-12-22 08:42:12,609 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 08:42:12,866 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2020-12-22 08:42:13,146 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-12-22 08:42:13,535 WARN L197 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-12-22 08:42:13,899 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-22 08:42:19,342 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-12-22 08:42:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:23,605 INFO L93 Difference]: Finished difference Result 25528 states and 37773 transitions. [2020-12-22 08:42:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 08:42:23,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:42:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:23,655 INFO L225 Difference]: With dead ends: 25528 [2020-12-22 08:42:23,656 INFO L226 Difference]: Without dead ends: 24460 [2020-12-22 08:42:23,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=539, Invalid=2541, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 08:42:23,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24460 states. [2020-12-22 08:42:25,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24460 to 4498. [2020-12-22 08:42:25,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4498 states. [2020-12-22 08:42:25,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4498 states to 4498 states and 6621 transitions. [2020-12-22 08:42:25,041 INFO L78 Accepts]: Start accepts. Automaton has 4498 states and 6621 transitions. Word has length 71 [2020-12-22 08:42:25,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:25,041 INFO L481 AbstractCegarLoop]: Abstraction has 4498 states and 6621 transitions. [2020-12-22 08:42:25,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:42:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 4498 states and 6621 transitions. [2020-12-22 08:42:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:42:25,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:25,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:25,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:42:25,044 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:25,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1932415602, now seen corresponding path program 1 times [2020-12-22 08:42:25,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:25,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418749573] [2020-12-22 08:42:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:26,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:42:26,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418749573] [2020-12-22 08:42:26,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:26,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 08:42:26,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794685774] [2020-12-22 08:42:26,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:42:26,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:42:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:42:26,054 INFO L87 Difference]: Start difference. First operand 4498 states and 6621 transitions. Second operand 27 states. [2020-12-22 08:42:26,340 WARN L197 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 89 [2020-12-22 08:42:26,920 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:42:27,363 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-12-22 08:42:27,537 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-12-22 08:42:27,740 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:42:27,947 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-22 08:42:28,202 WARN L197 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-12-22 08:42:28,477 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2020-12-22 08:42:28,824 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-12-22 08:42:29,045 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:42:29,277 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 08:42:29,490 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 08:42:29,819 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 08:42:30,141 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 08:42:31,167 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-12-22 08:42:32,008 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-12-22 08:42:36,600 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-22 08:42:43,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:42:43,869 INFO L93 Difference]: Finished difference Result 36768 states and 54432 transitions. [2020-12-22 08:42:43,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 08:42:43,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-22 08:42:43,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:42:43,932 INFO L225 Difference]: With dead ends: 36768 [2020-12-22 08:42:43,933 INFO L226 Difference]: Without dead ends: 35701 [2020-12-22 08:42:43,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=578, Invalid=2962, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 08:42:43,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35701 states. [2020-12-22 08:42:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35701 to 4503. [2020-12-22 08:42:45,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4503 states. [2020-12-22 08:42:45,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 6627 transitions. [2020-12-22 08:42:45,530 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 6627 transitions. Word has length 71 [2020-12-22 08:42:45,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:42:45,531 INFO L481 AbstractCegarLoop]: Abstraction has 4503 states and 6627 transitions. [2020-12-22 08:42:45,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 08:42:45,531 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 6627 transitions. [2020-12-22 08:42:45,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:42:45,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:42:45,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:42:45,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 08:42:45,533 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:42:45,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:42:45,534 INFO L82 PathProgramCache]: Analyzing trace with hash -748125324, now seen corresponding path program 1 times [2020-12-22 08:42:45,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:42:45,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972647418] [2020-12-22 08:42:45,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:42:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:42:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:42:47,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972647418] [2020-12-22 08:42:47,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:42:47,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:42:47,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43292541] [2020-12-22 08:42:47,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:42:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:42:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:42:47,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:42:47,149 INFO L87 Difference]: Start difference. First operand 4503 states and 6627 transitions. Second operand 28 states. [2020-12-22 08:42:47,622 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 105 [2020-12-22 08:42:48,422 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-22 08:42:48,619 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2020-12-22 08:42:48,838 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2020-12-22 08:42:49,252 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-12-22 08:42:49,551 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-12-22 08:42:49,932 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 74 [2020-12-22 08:42:50,330 WARN L197 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 82 [2020-12-22 08:42:50,812 WARN L197 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 100 [2020-12-22 08:42:51,369 WARN L197 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 113 [2020-12-22 08:42:52,049 WARN L197 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 122 [2020-12-22 08:42:52,382 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-12-22 08:42:52,706 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-12-22 08:42:53,071 WARN L197 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-12-22 08:42:53,523 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-12-22 08:42:53,962 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-12-22 08:42:54,356 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 08:42:54,748 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 08:42:55,102 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-22 08:42:56,221 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2020-12-22 08:43:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:07,390 INFO L93 Difference]: Finished difference Result 25735 states and 38040 transitions. [2020-12-22 08:43:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 08:43:07,392 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:43:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:07,438 INFO L225 Difference]: With dead ends: 25735 [2020-12-22 08:43:07,438 INFO L226 Difference]: Without dead ends: 24667 [2020-12-22 08:43:07,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=672, Invalid=2750, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 08:43:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24667 states. [2020-12-22 08:43:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24667 to 4503. [2020-12-22 08:43:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4503 states. [2020-12-22 08:43:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4503 states to 4503 states and 6627 transitions. [2020-12-22 08:43:08,873 INFO L78 Accepts]: Start accepts. Automaton has 4503 states and 6627 transitions. Word has length 71 [2020-12-22 08:43:08,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:43:08,873 INFO L481 AbstractCegarLoop]: Abstraction has 4503 states and 6627 transitions. [2020-12-22 08:43:08,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:43:08,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4503 states and 6627 transitions. [2020-12-22 08:43:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:43:08,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:43:08,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:43:08,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 08:43:08,876 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:43:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:43:08,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1237414452, now seen corresponding path program 1 times [2020-12-22 08:43:08,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:43:08,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453422867] [2020-12-22 08:43:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:43:08,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:43:10,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:43:10,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453422867] [2020-12-22 08:43:10,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:43:10,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-12-22 08:43:10,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781549688] [2020-12-22 08:43:10,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 08:43:10,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:43:10,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 08:43:10,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-12-22 08:43:10,309 INFO L87 Difference]: Start difference. First operand 4503 states and 6627 transitions. Second operand 26 states. [2020-12-22 08:43:10,648 WARN L197 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-22 08:43:11,297 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 08:43:11,807 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 08:43:12,013 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-22 08:43:12,288 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-22 08:43:12,594 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-12-22 08:43:12,964 WARN L197 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2020-12-22 08:43:13,354 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 08:43:13,855 WARN L197 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 102 [2020-12-22 08:43:14,095 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:43:14,382 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-12-22 08:43:14,584 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-12-22 08:43:16,290 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:43:21,989 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2020-12-22 08:43:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:28,832 INFO L93 Difference]: Finished difference Result 29154 states and 43136 transitions. [2020-12-22 08:43:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 08:43:28,833 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-12-22 08:43:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:28,863 INFO L225 Difference]: With dead ends: 29154 [2020-12-22 08:43:28,863 INFO L226 Difference]: Without dead ends: 27362 [2020-12-22 08:43:28,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=455, Invalid=2625, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 08:43:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27362 states. [2020-12-22 08:43:30,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27362 to 4513. [2020-12-22 08:43:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4513 states. [2020-12-22 08:43:30,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 6639 transitions. [2020-12-22 08:43:30,244 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 6639 transitions. Word has length 71 [2020-12-22 08:43:30,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:43:30,244 INFO L481 AbstractCegarLoop]: Abstraction has 4513 states and 6639 transitions. [2020-12-22 08:43:30,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 08:43:30,244 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 6639 transitions. [2020-12-22 08:43:30,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:43:30,245 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:43:30,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:43:30,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 08:43:30,246 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:43:30,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:43:30,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1749525204, now seen corresponding path program 1 times [2020-12-22 08:43:30,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:43:30,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79899267] [2020-12-22 08:43:30,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:43:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:43:31,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:43:31,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79899267] [2020-12-22 08:43:31,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:43:31,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-12-22 08:43:31,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350229002] [2020-12-22 08:43:31,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 08:43:31,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:43:31,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 08:43:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2020-12-22 08:43:31,983 INFO L87 Difference]: Start difference. First operand 4513 states and 6639 transitions. Second operand 28 states. [2020-12-22 08:43:32,430 WARN L197 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 111 [2020-12-22 08:43:32,979 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-12-22 08:43:33,194 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:43:33,424 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-12-22 08:43:33,649 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:43:34,113 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:43:34,407 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-12-22 08:43:34,789 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 78 [2020-12-22 08:43:35,201 WARN L197 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-12-22 08:43:35,752 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 109 [2020-12-22 08:43:36,340 WARN L197 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 122 [2020-12-22 08:43:37,067 WARN L197 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 135 [2020-12-22 08:43:37,403 WARN L197 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 08:43:37,781 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-12-22 08:43:38,070 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-22 08:43:38,295 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-22 08:43:38,508 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-22 08:43:38,977 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 08:43:39,531 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:43:48,617 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-22 08:43:49,551 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-22 08:43:53,837 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2020-12-22 08:43:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:43:57,799 INFO L93 Difference]: Finished difference Result 31469 states and 46570 transitions. [2020-12-22 08:43:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 08:43:57,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 71 [2020-12-22 08:43:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:43:57,845 INFO L225 Difference]: With dead ends: 31469 [2020-12-22 08:43:57,845 INFO L226 Difference]: Without dead ends: 30401 [2020-12-22 08:43:57,855 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=557, Invalid=3103, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 08:43:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30401 states. [2020-12-22 08:43:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30401 to 4513. [2020-12-22 08:43:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4513 states. [2020-12-22 08:43:59,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4513 states to 4513 states and 6639 transitions. [2020-12-22 08:43:59,425 INFO L78 Accepts]: Start accepts. Automaton has 4513 states and 6639 transitions. Word has length 71 [2020-12-22 08:43:59,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:43:59,425 INFO L481 AbstractCegarLoop]: Abstraction has 4513 states and 6639 transitions. [2020-12-22 08:43:59,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 08:43:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4513 states and 6639 transitions. [2020-12-22 08:43:59,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 08:43:59,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:43:59,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:43:59,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 08:43:59,427 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:43:59,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:43:59,428 INFO L82 PathProgramCache]: Analyzing trace with hash -187976173, now seen corresponding path program 1 times [2020-12-22 08:43:59,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:43:59,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939122070] [2020-12-22 08:43:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:43:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:44:01,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939122070] [2020-12-22 08:44:01,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:01,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 08:44:01,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62932968] [2020-12-22 08:44:01,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 08:44:01,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:01,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 08:44:01,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2020-12-22 08:44:01,219 INFO L87 Difference]: Start difference. First operand 4513 states and 6639 transitions. Second operand 27 states. [2020-12-22 08:44:01,653 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2020-12-22 08:44:02,311 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-12-22 08:44:02,537 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:44:02,775 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-12-22 08:44:02,985 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:44:03,404 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 08:44:03,683 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-22 08:44:04,030 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-12-22 08:44:04,435 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 72 [2020-12-22 08:44:04,979 WARN L197 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-12-22 08:44:05,531 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 92 [2020-12-22 08:44:06,218 WARN L197 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-12-22 08:44:06,551 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:44:06,866 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-12-22 08:44:07,112 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:44:07,340 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:44:07,533 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2020-12-22 08:44:08,123 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:44:08,574 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-12-22 08:44:09,810 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-12-22 08:44:15,366 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-12-22 08:44:17,723 WARN L197 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-12-22 08:44:24,101 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-22 08:44:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:35,324 INFO L93 Difference]: Finished difference Result 57148 states and 84583 transitions. [2020-12-22 08:44:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 08:44:35,428 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-12-22 08:44:35,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:35,493 INFO L225 Difference]: With dead ends: 57148 [2020-12-22 08:44:35,493 INFO L226 Difference]: Without dead ends: 55356 [2020-12-22 08:44:35,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=670, Invalid=3490, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 08:44:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55356 states. [2020-12-22 08:44:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55356 to 4523. [2020-12-22 08:44:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4523 states. [2020-12-22 08:44:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6651 transitions. [2020-12-22 08:44:37,563 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6651 transitions. Word has length 71 [2020-12-22 08:44:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:37,564 INFO L481 AbstractCegarLoop]: Abstraction has 4523 states and 6651 transitions. [2020-12-22 08:44:37,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 08:44:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6651 transitions. [2020-12-22 08:44:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:44:37,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:37,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:37,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 08:44:37,565 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash -78323220, now seen corresponding path program 1 times [2020-12-22 08:44:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:37,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236410507] [2020-12-22 08:44:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:38,249 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-12-22 08:44:38,585 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-12-22 08:44:39,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:44:39,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236410507] [2020-12-22 08:44:39,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:39,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-12-22 08:44:39,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839261409] [2020-12-22 08:44:39,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 08:44:39,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:39,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 08:44:39,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-12-22 08:44:39,101 INFO L87 Difference]: Start difference. First operand 4523 states and 6651 transitions. Second operand 17 states. [2020-12-22 08:44:39,288 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-12-22 08:44:39,585 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-22 08:44:39,763 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-12-22 08:44:39,999 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-12-22 08:44:40,274 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2020-12-22 08:44:40,506 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-12-22 08:44:40,911 WARN L197 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 08:44:41,200 WARN L197 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:44:41,505 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:44:41,766 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-12-22 08:44:42,005 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-22 08:44:42,242 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:44:42,455 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-22 08:44:42,622 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 08:44:42,839 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 08:44:44,045 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 08:44:51,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:44:51,245 INFO L93 Difference]: Finished difference Result 17787 states and 26288 transitions. [2020-12-22 08:44:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 08:44:51,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 72 [2020-12-22 08:44:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:44:51,266 INFO L225 Difference]: With dead ends: 17787 [2020-12-22 08:44:51,266 INFO L226 Difference]: Without dead ends: 15963 [2020-12-22 08:44:51,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 08:44:51,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2020-12-22 08:44:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 4508. [2020-12-22 08:44:53,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4508 states. [2020-12-22 08:44:53,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4508 states to 4508 states and 6629 transitions. [2020-12-22 08:44:53,209 INFO L78 Accepts]: Start accepts. Automaton has 4508 states and 6629 transitions. Word has length 72 [2020-12-22 08:44:53,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:44:53,209 INFO L481 AbstractCegarLoop]: Abstraction has 4508 states and 6629 transitions. [2020-12-22 08:44:53,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 08:44:53,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4508 states and 6629 transitions. [2020-12-22 08:44:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:44:53,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:44:53,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:44:53,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 08:44:53,211 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:44:53,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:44:53,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1932679112, now seen corresponding path program 1 times [2020-12-22 08:44:53,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:44:53,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297314946] [2020-12-22 08:44:53,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:44:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:44:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:44:54,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297314946] [2020-12-22 08:44:54,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:44:54,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-12-22 08:44:54,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169643892] [2020-12-22 08:44:54,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 08:44:54,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:44:54,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 08:44:54,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-12-22 08:44:54,007 INFO L87 Difference]: Start difference. First operand 4508 states and 6629 transitions. Second operand 13 states. [2020-12-22 08:44:54,783 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-12-22 08:44:55,078 WARN L197 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-12-22 08:44:55,375 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-12-22 08:44:55,959 WARN L197 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-12-22 08:44:56,360 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-12-22 08:45:04,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:04,315 INFO L93 Difference]: Finished difference Result 19343 states and 28596 transitions. [2020-12-22 08:45:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 08:45:04,317 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-12-22 08:45:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:04,338 INFO L225 Difference]: With dead ends: 19343 [2020-12-22 08:45:04,338 INFO L226 Difference]: Without dead ends: 17515 [2020-12-22 08:45:04,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-12-22 08:45:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17515 states. [2020-12-22 08:45:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17515 to 4471. [2020-12-22 08:45:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4471 states. [2020-12-22 08:45:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4471 states to 4471 states and 6578 transitions. [2020-12-22 08:45:06,459 INFO L78 Accepts]: Start accepts. Automaton has 4471 states and 6578 transitions. Word has length 72 [2020-12-22 08:45:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:06,459 INFO L481 AbstractCegarLoop]: Abstraction has 4471 states and 6578 transitions. [2020-12-22 08:45:06,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 08:45:06,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4471 states and 6578 transitions. [2020-12-22 08:45:06,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:45:06,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:06,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:06,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 08:45:06,461 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:06,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:06,461 INFO L82 PathProgramCache]: Analyzing trace with hash -4822265, now seen corresponding path program 1 times [2020-12-22 08:45:06,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:06,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951819645] [2020-12-22 08:45:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:45:07,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951819645] [2020-12-22 08:45:07,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:07,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-12-22 08:45:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483818963] [2020-12-22 08:45:07,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 08:45:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:07,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 08:45:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-22 08:45:07,648 INFO L87 Difference]: Start difference. First operand 4471 states and 6578 transitions. Second operand 16 states. [2020-12-22 08:45:07,810 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-12-22 08:45:08,155 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-12-22 08:45:08,432 WARN L197 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 23 [2020-12-22 08:45:08,697 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 30 [2020-12-22 08:45:09,236 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-12-22 08:45:09,824 WARN L197 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-12-22 08:45:10,249 WARN L197 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:45:10,545 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-12-22 08:45:10,799 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 08:45:11,297 WARN L197 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-12-22 08:45:12,490 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-12-22 08:45:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:22,161 INFO L93 Difference]: Finished difference Result 21315 states and 31557 transitions. [2020-12-22 08:45:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 08:45:22,163 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-12-22 08:45:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:22,183 INFO L225 Difference]: With dead ends: 21315 [2020-12-22 08:45:22,183 INFO L226 Difference]: Without dead ends: 19521 [2020-12-22 08:45:22,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2020-12-22 08:45:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19521 states. [2020-12-22 08:45:24,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19521 to 4482. [2020-12-22 08:45:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4482 states. [2020-12-22 08:45:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6591 transitions. [2020-12-22 08:45:24,416 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6591 transitions. Word has length 72 [2020-12-22 08:45:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:24,416 INFO L481 AbstractCegarLoop]: Abstraction has 4482 states and 6591 transitions. [2020-12-22 08:45:24,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 08:45:24,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6591 transitions. [2020-12-22 08:45:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:45:24,417 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:24,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:24,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 08:45:24,417 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1545437633, now seen corresponding path program 1 times [2020-12-22 08:45:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:24,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084918092] [2020-12-22 08:45:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:24,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:45:24,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084918092] [2020-12-22 08:45:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:45:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138589661] [2020-12-22 08:45:24,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:45:24,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:24,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:45:24,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:45:24,542 INFO L87 Difference]: Start difference. First operand 4482 states and 6591 transitions. Second operand 4 states. [2020-12-22 08:45:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:27,668 INFO L93 Difference]: Finished difference Result 10738 states and 15869 transitions. [2020-12-22 08:45:27,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 08:45:27,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-12-22 08:45:27,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:27,679 INFO L225 Difference]: With dead ends: 10738 [2020-12-22 08:45:27,680 INFO L226 Difference]: Without dead ends: 6412 [2020-12-22 08:45:27,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:45:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2020-12-22 08:45:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6366. [2020-12-22 08:45:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6366 states. [2020-12-22 08:45:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6366 states to 6366 states and 9309 transitions. [2020-12-22 08:45:30,686 INFO L78 Accepts]: Start accepts. Automaton has 6366 states and 9309 transitions. Word has length 72 [2020-12-22 08:45:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:30,686 INFO L481 AbstractCegarLoop]: Abstraction has 6366 states and 9309 transitions. [2020-12-22 08:45:30,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:45:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 6366 states and 9309 transitions. [2020-12-22 08:45:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:45:30,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:30,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:30,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 08:45:30,687 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash -654506813, now seen corresponding path program 1 times [2020-12-22 08:45:30,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:30,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575520608] [2020-12-22 08:45:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:30,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:45:30,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575520608] [2020-12-22 08:45:30,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:30,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:45:30,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902158378] [2020-12-22 08:45:30,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:45:30,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:30,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:45:30,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:45:30,806 INFO L87 Difference]: Start difference. First operand 6366 states and 9309 transitions. Second operand 5 states. [2020-12-22 08:45:35,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:45:35,795 INFO L93 Difference]: Finished difference Result 9786 states and 14270 transitions. [2020-12-22 08:45:35,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:45:35,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-12-22 08:45:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:45:35,808 INFO L225 Difference]: With dead ends: 9786 [2020-12-22 08:45:35,808 INFO L226 Difference]: Without dead ends: 9784 [2020-12-22 08:45:35,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 08:45:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2020-12-22 08:45:38,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 6406. [2020-12-22 08:45:38,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6406 states. [2020-12-22 08:45:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6406 states to 6406 states and 9303 transitions. [2020-12-22 08:45:38,880 INFO L78 Accepts]: Start accepts. Automaton has 6406 states and 9303 transitions. Word has length 72 [2020-12-22 08:45:38,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:45:38,881 INFO L481 AbstractCegarLoop]: Abstraction has 6406 states and 9303 transitions. [2020-12-22 08:45:38,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:45:38,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6406 states and 9303 transitions. [2020-12-22 08:45:38,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 08:45:38,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:45:38,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:45:38,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 08:45:38,882 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:45:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:45:38,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1392166567, now seen corresponding path program 1 times [2020-12-22 08:45:38,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:45:38,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512903607] [2020-12-22 08:45:38,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:45:38,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:45:39,459 WARN L197 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-12-22 08:45:39,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 08:45:39,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512903607] [2020-12-22 08:45:39,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:45:39,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 08:45:39,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569218791] [2020-12-22 08:45:39,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 08:45:39,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:45:39,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 08:45:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-12-22 08:45:39,840 INFO L87 Difference]: Start difference. First operand 6406 states and 9303 transitions. Second operand 14 states. [2020-12-22 08:45:39,991 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2020-12-22 08:45:40,417 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2020-12-22 08:45:40,799 WARN L197 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2020-12-22 08:45:41,199 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:45:41,622 WARN L197 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 08:45:41,787 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 42