/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:19:50,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:19:50,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:19:50,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:19:50,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:19:50,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:19:50,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:19:50,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:19:50,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:19:50,925 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:19:50,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:19:50,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:19:50,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:19:50,932 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:19:50,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:19:50,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:19:50,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:19:50,933 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:19:50,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:19:50,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:19:50,934 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:19:50,934 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:19:50,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:19:50,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:50,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:19:50,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:19:50,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:19:50,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:19:50,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:19:50,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:19:50,936 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:19:50,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:19:51,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:19:51,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:19:51,444 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:19:51,445 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:19:51,446 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:19:51,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2020-12-21 21:19:51,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc48e42/9232071598fe49d7b2e200723d380f2b/FLAG7eaba3d78 [2020-12-21 21:19:52,148 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:19:52,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2020-12-21 21:19:52,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc48e42/9232071598fe49d7b2e200723d380f2b/FLAG7eaba3d78 [2020-12-21 21:19:52,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40dc48e42/9232071598fe49d7b2e200723d380f2b [2020-12-21 21:19:52,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:19:52,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:19:52,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:19:52,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:19:52,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71aa20ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52, skipping insertion in model container [2020-12-21 21:19:52,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:19:52,607 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:19:52,817 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2020-12-21 21:19:52,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,851 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:19:52,866 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i[823,836] [2020-12-21 21:19:52,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:19:52,898 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:19:52,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52 WrapperNode [2020-12-21 21:19:52,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:19:52,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:19:52,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:19:52,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,935 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,970 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:19:52,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:19:52,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:19:52,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:19:52,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:52,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... [2020-12-21 21:19:53,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:19:53,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:19:53,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:19:53,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:19:53,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:19:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:19:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:19:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:19:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:19:53,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:19:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:19:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:19:53,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:19:53,697 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-21 21:19:53,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53 BoogieIcfgContainer [2020-12-21 21:19:53,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:19:53,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:19:53,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:19:53,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:19:53,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:19:52" (1/3) ... [2020-12-21 21:19:53,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dddf7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:19:52" (2/3) ... [2020-12-21 21:19:53,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dddf7f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:19:53, skipping insertion in model container [2020-12-21 21:19:53,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:19:53" (3/3) ... [2020-12-21 21:19:53,755 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2020-12-21 21:19:53,792 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:19:53,807 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-21 21:19:53,831 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-21 21:19:53,877 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:19:53,878 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:19:53,878 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:19:53,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:19:53,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:19:53,878 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:19:53,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:19:53,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:19:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-21 21:19:53,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:53,907 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:53,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:53,908 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:53,915 INFO L82 PathProgramCache]: Analyzing trace with hash 305970967, now seen corresponding path program 1 times [2020-12-21 21:19:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:53,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536427489] [2020-12-21 21:19:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536427489] [2020-12-21 21:19:54,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:19:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321192953] [2020-12-21 21:19:54,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:19:54,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:19:54,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:54,174 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-21 21:19:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,204 INFO L93 Difference]: Finished difference Result 76 states and 114 transitions. [2020-12-21 21:19:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:19:54,206 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-21 21:19:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,223 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:19:54,223 INFO L226 Difference]: Without dead ends: 36 [2020-12-21 21:19:54,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:19:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-21 21:19:54,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-21 21:19:54,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:19:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:19:54,273 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 10 [2020-12-21 21:19:54,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,273 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:19:54,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:19:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:19:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-21 21:19:54,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,276 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:19:54,278 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 2024314673, now seen corresponding path program 1 times [2020-12-21 21:19:54,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321040623] [2020-12-21 21:19:54,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321040623] [2020-12-21 21:19:54,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:54,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:19:54,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935271141] [2020-12-21 21:19:54,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,385 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-21 21:19:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,418 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2020-12-21 21:19:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,421 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-21 21:19:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,422 INFO L225 Difference]: With dead ends: 70 [2020-12-21 21:19:54,422 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:19:54,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:19:54,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:19:54,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-21 21:19:54,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-21 21:19:54,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-12-21 21:19:54,435 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 10 [2020-12-21 21:19:54,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,436 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-12-21 21:19:54,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,436 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-12-21 21:19:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-21 21:19:54,437 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:19:54,438 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1369117107, now seen corresponding path program 1 times [2020-12-21 21:19:54,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590560845] [2020-12-21 21:19:54,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590560845] [2020-12-21 21:19:54,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420123444] [2020-12-21 21:19:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:54,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:54,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:19:54,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807336759] [2020-12-21 21:19:54,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:19:54,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:54,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:19:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,582 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 3 states. [2020-12-21 21:19:54,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:54,628 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-21 21:19:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:19:54,629 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-12-21 21:19:54,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:54,630 INFO L225 Difference]: With dead ends: 68 [2020-12-21 21:19:54,630 INFO L226 Difference]: Without dead ends: 59 [2020-12-21 21:19:54,631 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-21 21:19:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2020-12-21 21:19:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:19:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2020-12-21 21:19:54,638 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 12 [2020-12-21 21:19:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:54,638 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2020-12-21 21:19:54,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:19:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2020-12-21 21:19:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-21 21:19:54,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:54,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:54,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:19:54,857 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 2104069184, now seen corresponding path program 1 times [2020-12-21 21:19:54,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:54,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685724310] [2020-12-21 21:19:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:54,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685724310] [2020-12-21 21:19:54,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672523546] [2020-12-21 21:19:54,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:54,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:54,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:19:55,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:19:55,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877080006] [2020-12-21 21:19:55,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:19:55,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:19:55,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,060 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand 5 states. [2020-12-21 21:19:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,100 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2020-12-21 21:19:55,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-21 21:19:55,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,103 INFO L225 Difference]: With dead ends: 74 [2020-12-21 21:19:55,104 INFO L226 Difference]: Without dead ends: 41 [2020-12-21 21:19:55,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:19:55,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-21 21:19:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-12-21 21:19:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-21 21:19:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-21 21:19:55,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 14 [2020-12-21 21:19:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,121 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-21 21:19:55,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:19:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-21 21:19:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:19:55,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,124 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,339 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1270281666, now seen corresponding path program 2 times [2020-12-21 21:19:55,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987550705] [2020-12-21 21:19:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-21 21:19:55,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987550705] [2020-12-21 21:19:55,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:55,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:55,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544764530] [2020-12-21 21:19:55,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:55,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:55,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,426 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2020-12-21 21:19:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,486 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2020-12-21 21:19:55,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-21 21:19:55,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,493 INFO L225 Difference]: With dead ends: 95 [2020-12-21 21:19:55,493 INFO L226 Difference]: Without dead ends: 64 [2020-12-21 21:19:55,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-21 21:19:55,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 41. [2020-12-21 21:19:55,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-21 21:19:55,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2020-12-21 21:19:55,507 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 16 [2020-12-21 21:19:55,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,508 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2020-12-21 21:19:55,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:55,508 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2020-12-21 21:19:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-21 21:19:55,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,509 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-21 21:19:55,510 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,512 INFO L82 PathProgramCache]: Analyzing trace with hash 851634768, now seen corresponding path program 1 times [2020-12-21 21:19:55,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198206552] [2020-12-21 21:19:55,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:19:55,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198206552] [2020-12-21 21:19:55,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:19:55,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-21 21:19:55,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598836941] [2020-12-21 21:19:55,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-21 21:19:55,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-21 21:19:55,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,635 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand 4 states. [2020-12-21 21:19:55,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,674 INFO L93 Difference]: Finished difference Result 92 states and 115 transitions. [2020-12-21 21:19:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:19:55,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-21 21:19:55,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,675 INFO L225 Difference]: With dead ends: 92 [2020-12-21 21:19:55,676 INFO L226 Difference]: Without dead ends: 61 [2020-12-21 21:19:55,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-21 21:19:55,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-21 21:19:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-12-21 21:19:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:19:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2020-12-21 21:19:55,683 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 19 [2020-12-21 21:19:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,684 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2020-12-21 21:19:55,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-21 21:19:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2020-12-21 21:19:55,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-21 21:19:55,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:55,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-21 21:19:55,685 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:55,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:55,686 INFO L82 PathProgramCache]: Analyzing trace with hash 629647741, now seen corresponding path program 1 times [2020-12-21 21:19:55,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:55,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101818405] [2020-12-21 21:19:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:55,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101818405] [2020-12-21 21:19:55,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376432067] [2020-12-21 21:19:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:55,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:55,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:55,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:55,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:19:55,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268473082] [2020-12-21 21:19:55,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:19:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:55,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:19:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,916 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand 6 states. [2020-12-21 21:19:55,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:55,951 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-12-21 21:19:55,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:19:55,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-21 21:19:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:55,952 INFO L225 Difference]: With dead ends: 94 [2020-12-21 21:19:55,953 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:19:55,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:19:55,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:19:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-21 21:19:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-21 21:19:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2020-12-21 21:19:55,960 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 20 [2020-12-21 21:19:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:55,960 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2020-12-21 21:19:55,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:19:55,961 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2020-12-21 21:19:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-21 21:19:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:55,962 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1857263233, now seen corresponding path program 2 times [2020-12-21 21:19:56,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148015462] [2020-12-21 21:19:56,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:19:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148015462] [2020-12-21 21:19:56,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789618973] [2020-12-21 21:19:56,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-21 21:19:56,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:56,389 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:19:56,406 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-21 21:19:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-21 21:19:56,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:19:56,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-12-21 21:19:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624986268] [2020-12-21 21:19:56,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:19:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:19:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:56,432 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand 6 states. [2020-12-21 21:19:56,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:56,573 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-12-21 21:19:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:19:56,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-21 21:19:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:56,577 INFO L225 Difference]: With dead ends: 81 [2020-12-21 21:19:56,577 INFO L226 Difference]: Without dead ends: 79 [2020-12-21 21:19:56,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:19:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-21 21:19:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2020-12-21 21:19:56,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-21 21:19:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2020-12-21 21:19:56,585 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 22 [2020-12-21 21:19:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:56,586 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2020-12-21 21:19:56,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:19:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2020-12-21 21:19:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:19:56,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:56,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:56,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,802 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:56,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:56,803 INFO L82 PathProgramCache]: Analyzing trace with hash -487696587, now seen corresponding path program 1 times [2020-12-21 21:19:56,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:56,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312787478] [2020-12-21 21:19:56,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:56,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312787478] [2020-12-21 21:19:56,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705878966] [2020-12-21 21:19:56,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:56,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:19:56,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:57,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:19:57,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263747636] [2020-12-21 21:19:57,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:19:57,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:19:57,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:57,081 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 7 states. [2020-12-21 21:19:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,113 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-12-21 21:19:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:19:57,114 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-21 21:19:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,117 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:19:57,120 INFO L226 Difference]: Without dead ends: 55 [2020-12-21 21:19:57,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:19:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-21 21:19:57,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-12-21 21:19:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:19:57,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2020-12-21 21:19:57,130 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 26 [2020-12-21 21:19:57,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,131 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2020-12-21 21:19:57,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:19:57,133 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2020-12-21 21:19:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-21 21:19:57,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,135 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,346 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,347 INFO L82 PathProgramCache]: Analyzing trace with hash -2115007049, now seen corresponding path program 2 times [2020-12-21 21:19:57,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036184146] [2020-12-21 21:19:57,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:57,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036184146] [2020-12-21 21:19:57,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136365651] [2020-12-21 21:19:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:57,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:57,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:19:57,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026853155] [2020-12-21 21:19:57,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:19:57,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:57,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:19:57,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:57,557 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand 8 states. [2020-12-21 21:19:57,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:57,586 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-12-21 21:19:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:19:57,586 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-21 21:19:57,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:57,587 INFO L225 Difference]: With dead ends: 100 [2020-12-21 21:19:57,587 INFO L226 Difference]: Without dead ends: 57 [2020-12-21 21:19:57,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:19:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-21 21:19:57,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-21 21:19:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:19:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2020-12-21 21:19:57,595 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 28 [2020-12-21 21:19:57,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:57,596 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2020-12-21 21:19:57,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:19:57,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2020-12-21 21:19:57,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-21 21:19:57,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:57,598 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:57,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,812 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:57,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1702702009, now seen corresponding path program 3 times [2020-12-21 21:19:57,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:57,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86212660] [2020-12-21 21:19:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:57,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86212660] [2020-12-21 21:19:57,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633720174] [2020-12-21 21:19:57,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:57,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:19:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:19:57,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-21 21:19:58,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2020-12-21 21:19:58,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509210868] [2020-12-21 21:19:58,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:58,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:58,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,013 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 10 states. [2020-12-21 21:19:58,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,180 INFO L93 Difference]: Finished difference Result 132 states and 165 transitions. [2020-12-21 21:19:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:58,181 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-12-21 21:19:58,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,182 INFO L225 Difference]: With dead ends: 132 [2020-12-21 21:19:58,182 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:19:58,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:58,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:19:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-12-21 21:19:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-21 21:19:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-12-21 21:19:58,191 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 30 [2020-12-21 21:19:58,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,191 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-12-21 21:19:58,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:58,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2020-12-21 21:19:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-21 21:19:58,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,193 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,407 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1917971385, now seen corresponding path program 1 times [2020-12-21 21:19:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267516493] [2020-12-21 21:19:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267516493] [2020-12-21 21:19:58,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374036667] [2020-12-21 21:19:58,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:58,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:19:58,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:58,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:58,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:19:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293682757] [2020-12-21 21:19:58,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:19:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:58,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:19:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,604 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand 10 states. [2020-12-21 21:19:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:58,642 INFO L93 Difference]: Finished difference Result 120 states and 152 transitions. [2020-12-21 21:19:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:19:58,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 32 [2020-12-21 21:19:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:58,643 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:19:58,644 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:19:58,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:19:58,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:19:58,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-21 21:19:58,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:19:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-12-21 21:19:58,651 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 32 [2020-12-21 21:19:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:58,651 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-12-21 21:19:58,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:19:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-12-21 21:19:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-21 21:19:58,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:58,653 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:58,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-21 21:19:58,868 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:58,869 INFO L82 PathProgramCache]: Analyzing trace with hash 2046605499, now seen corresponding path program 2 times [2020-12-21 21:19:58,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:58,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239908905] [2020-12-21 21:19:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239908905] [2020-12-21 21:19:59,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161576362] [2020-12-21 21:19:59,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:19:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,172 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:59,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:19:59,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560918929] [2020-12-21 21:19:59,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:19:59,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:19:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:59,175 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 11 states. [2020-12-21 21:19:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,211 INFO L93 Difference]: Finished difference Result 122 states and 154 transitions. [2020-12-21 21:19:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:19:59,212 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-21 21:19:59,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,213 INFO L225 Difference]: With dead ends: 122 [2020-12-21 21:19:59,213 INFO L226 Difference]: Without dead ends: 71 [2020-12-21 21:19:59,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:19:59,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-21 21:19:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2020-12-21 21:19:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-21 21:19:59,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 86 transitions. [2020-12-21 21:19:59,219 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 86 transitions. Word has length 34 [2020-12-21 21:19:59,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,220 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-12-21 21:19:59,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:19:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 86 transitions. [2020-12-21 21:19:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:19:59,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,221 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:19:59,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,435 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:19:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:19:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1109937469, now seen corresponding path program 3 times [2020-12-21 21:19:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:19:59,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165779379] [2020-12-21 21:19:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:19:59,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:19:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-21 21:19:59,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165779379] [2020-12-21 21:19:59,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541613655] [2020-12-21 21:19:59,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:19:59,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-21 21:19:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:19:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:19:59,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:19:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-21 21:19:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:19:59,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 14 [2020-12-21 21:19:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149631214] [2020-12-21 21:19:59,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:19:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:19:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:19:59,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:19:59,702 INFO L87 Difference]: Start difference. First operand 70 states and 86 transitions. Second operand 14 states. [2020-12-21 21:19:59,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:19:59,966 INFO L93 Difference]: Finished difference Result 140 states and 178 transitions. [2020-12-21 21:19:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-21 21:19:59,966 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-12-21 21:19:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:19:59,967 INFO L225 Difference]: With dead ends: 140 [2020-12-21 21:19:59,967 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:19:59,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:19:59,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:19:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2020-12-21 21:19:59,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-21 21:19:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-12-21 21:19:59,984 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 36 [2020-12-21 21:19:59,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:19:59,984 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-12-21 21:19:59,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:19:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-12-21 21:19:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:19:59,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:19:59,990 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,198 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,199 INFO L82 PathProgramCache]: Analyzing trace with hash 102207473, now seen corresponding path program 4 times [2020-12-21 21:20:00,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139711541] [2020-12-21 21:20:00,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139711541] [2020-12-21 21:20:00,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644884161] [2020-12-21 21:20:00,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:00,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:00,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:00,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:00,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:00,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:20:00,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275423401] [2020-12-21 21:20:00,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:20:00,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:00,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:20:00,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,482 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 13 states. [2020-12-21 21:20:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:00,527 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2020-12-21 21:20:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:20:00,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-12-21 21:20:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:00,529 INFO L225 Difference]: With dead ends: 136 [2020-12-21 21:20:00,529 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:20:00,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:20:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:20:00,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-21 21:20:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-21 21:20:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2020-12-21 21:20:00,539 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 41 [2020-12-21 21:20:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:00,541 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2020-12-21 21:20:00,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:20:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2020-12-21 21:20:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:20:00,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:00,548 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:00,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-21 21:20:00,762 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1244248785, now seen corresponding path program 5 times [2020-12-21 21:20:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911853826] [2020-12-21 21:20:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:00,891 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:00,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911853826] [2020-12-21 21:20:00,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127150452] [2020-12-21 21:20:00,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-21 21:20:01,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:01,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:20:01,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811007271] [2020-12-21 21:20:01,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:20:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:20:01,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:01,103 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand 14 states. [2020-12-21 21:20:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:01,158 INFO L93 Difference]: Finished difference Result 138 states and 172 transitions. [2020-12-21 21:20:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:20:01,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-12-21 21:20:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:01,160 INFO L225 Difference]: With dead ends: 138 [2020-12-21 21:20:01,160 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:20:01,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:20:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:20:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-21 21:20:01,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-21 21:20:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 98 transitions. [2020-12-21 21:20:01,188 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 98 transitions. Word has length 43 [2020-12-21 21:20:01,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:01,189 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 98 transitions. [2020-12-21 21:20:01,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:20:01,189 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 98 transitions. [2020-12-21 21:20:01,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-21 21:20:01,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:01,191 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:01,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-21 21:20:01,407 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:01,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1891410669, now seen corresponding path program 6 times [2020-12-21 21:20:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458016952] [2020-12-21 21:20:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-21 21:20:01,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458016952] [2020-12-21 21:20:01,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312453539] [2020-12-21 21:20:01,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:01,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-21 21:20:01,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:01,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:20:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2020-12-21 21:20:01,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:01,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-12-21 21:20:01,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932686986] [2020-12-21 21:20:01,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-21 21:20:01,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:01,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-21 21:20:01,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2020-12-21 21:20:01,755 INFO L87 Difference]: Start difference. First operand 81 states and 98 transitions. Second operand 18 states. [2020-12-21 21:20:02,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,180 INFO L93 Difference]: Finished difference Result 157 states and 198 transitions. [2020-12-21 21:20:02,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:02,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-12-21 21:20:02,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,182 INFO L225 Difference]: With dead ends: 157 [2020-12-21 21:20:02,182 INFO L226 Difference]: Without dead ends: 101 [2020-12-21 21:20:02,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2020-12-21 21:20:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-21 21:20:02,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-21 21:20:02,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-21 21:20:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-21 21:20:02,190 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 45 [2020-12-21 21:20:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,190 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-21 21:20:02,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-21 21:20:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-21 21:20:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-21 21:20:02,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,191 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:02,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-21 21:20:02,405 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:02,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:02,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1678460795, now seen corresponding path program 7 times [2020-12-21 21:20:02,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:02,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068015860] [2020-12-21 21:20:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:02,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,585 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068015860] [2020-12-21 21:20:02,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576864473] [2020-12-21 21:20:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:02,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:02,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:02,742 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:02,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:02,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-21 21:20:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052400750] [2020-12-21 21:20:02,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-21 21:20:02,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-21 21:20:02,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:02,747 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 16 states. [2020-12-21 21:20:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:02,803 INFO L93 Difference]: Finished difference Result 154 states and 192 transitions. [2020-12-21 21:20:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-21 21:20:02,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 50 [2020-12-21 21:20:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:02,808 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:20:02,808 INFO L226 Difference]: Without dead ends: 92 [2020-12-21 21:20:02,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-21 21:20:02,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-21 21:20:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-21 21:20:02,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-21 21:20:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions. [2020-12-21 21:20:02,815 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 50 [2020-12-21 21:20:02,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:02,817 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 110 transitions. [2020-12-21 21:20:02,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-21 21:20:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions. [2020-12-21 21:20:02,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-21 21:20:02,818 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:02,818 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,032 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,032 INFO L82 PathProgramCache]: Analyzing trace with hash -658831097, now seen corresponding path program 8 times [2020-12-21 21:20:03,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353961376] [2020-12-21 21:20:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,213 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:03,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353961376] [2020-12-21 21:20:03,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320805403] [2020-12-21 21:20:03,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:03,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:03,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:03,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-21 21:20:03,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902228942] [2020-12-21 21:20:03,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-21 21:20:03,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:03,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-21 21:20:03,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:03,369 INFO L87 Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states. [2020-12-21 21:20:03,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:03,433 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-12-21 21:20:03,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-21 21:20:03,434 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-21 21:20:03,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:03,435 INFO L225 Difference]: With dead ends: 156 [2020-12-21 21:20:03,435 INFO L226 Difference]: Without dead ends: 94 [2020-12-21 21:20:03,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-21 21:20:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-21 21:20:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-21 21:20:03,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-21 21:20:03,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2020-12-21 21:20:03,441 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 52 [2020-12-21 21:20:03,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:03,442 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2020-12-21 21:20:03,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-21 21:20:03,442 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2020-12-21 21:20:03,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-21 21:20:03,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:03,442 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:03,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,657 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:03,658 INFO L82 PathProgramCache]: Analyzing trace with hash -47234807, now seen corresponding path program 9 times [2020-12-21 21:20:03,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:03,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083702516] [2020-12-21 21:20:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-21 21:20:03,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083702516] [2020-12-21 21:20:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720526940] [2020-12-21 21:20:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:03,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:20:03,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:03,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:20:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-12-21 21:20:04,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:04,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2020-12-21 21:20:04,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983818731] [2020-12-21 21:20:04,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:04,106 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand 22 states. [2020-12-21 21:20:04,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:04,605 INFO L93 Difference]: Finished difference Result 175 states and 220 transitions. [2020-12-21 21:20:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:04,606 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-12-21 21:20:04,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:04,607 INFO L225 Difference]: With dead ends: 175 [2020-12-21 21:20:04,607 INFO L226 Difference]: Without dead ends: 113 [2020-12-21 21:20:04,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=450, Invalid=1190, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:04,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-21 21:20:04,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-12-21 21:20:04,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-21 21:20:04,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 122 transitions. [2020-12-21 21:20:04,615 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 122 transitions. Word has length 54 [2020-12-21 21:20:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:04,615 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 122 transitions. [2020-12-21 21:20:04,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:04,616 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 122 transitions. [2020-12-21 21:20:04,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:20:04,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:04,617 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:04,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:04,832 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:04,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:04,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1523186395, now seen corresponding path program 10 times [2020-12-21 21:20:04,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:04,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567297946] [2020-12-21 21:20:04,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,042 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:05,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567297946] [2020-12-21 21:20:05,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993420008] [2020-12-21 21:20:05,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:05,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:05,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:05,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:20:05,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:05,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:05,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-21 21:20:05,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624675940] [2020-12-21 21:20:05,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-21 21:20:05,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:05,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-21 21:20:05,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:05,195 INFO L87 Difference]: Start difference. First operand 101 states and 122 transitions. Second operand 19 states. [2020-12-21 21:20:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:05,259 INFO L93 Difference]: Finished difference Result 172 states and 214 transitions. [2020-12-21 21:20:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-21 21:20:05,260 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-12-21 21:20:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:05,261 INFO L225 Difference]: With dead ends: 172 [2020-12-21 21:20:05,261 INFO L226 Difference]: Without dead ends: 104 [2020-12-21 21:20:05,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-21 21:20:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-21 21:20:05,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-21 21:20:05,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-21 21:20:05,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2020-12-21 21:20:05,267 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 59 [2020-12-21 21:20:05,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:05,267 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2020-12-21 21:20:05,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-21 21:20:05,268 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2020-12-21 21:20:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-21 21:20:05,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:05,269 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:05,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-21 21:20:05,483 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:05,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:05,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1742022371, now seen corresponding path program 11 times [2020-12-21 21:20:05,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:05,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294162746] [2020-12-21 21:20:05,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:05,741 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294162746] [2020-12-21 21:20:05,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710126114] [2020-12-21 21:20:05,742 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-21 21:20:06,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,103 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:06,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-21 21:20:06,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186755548] [2020-12-21 21:20:06,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-21 21:20:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-21 21:20:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:06,106 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 20 states. [2020-12-21 21:20:06,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:06,177 INFO L93 Difference]: Finished difference Result 174 states and 216 transitions. [2020-12-21 21:20:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-21 21:20:06,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 61 [2020-12-21 21:20:06,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:06,178 INFO L225 Difference]: With dead ends: 174 [2020-12-21 21:20:06,179 INFO L226 Difference]: Without dead ends: 106 [2020-12-21 21:20:06,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-21 21:20:06,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-21 21:20:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-21 21:20:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-21 21:20:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2020-12-21 21:20:06,185 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 61 [2020-12-21 21:20:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:06,185 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2020-12-21 21:20:06,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-21 21:20:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2020-12-21 21:20:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-21 21:20:06,186 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:06,186 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:06,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-21 21:20:06,400 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash -13446879, now seen corresponding path program 12 times [2020-12-21 21:20:06,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:06,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093821063] [2020-12-21 21:20:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-21 21:20:06,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093821063] [2020-12-21 21:20:06,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436733311] [2020-12-21 21:20:06,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:06,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-21 21:20:06,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:06,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:20:06,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2020-12-21 21:20:06,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:06,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2020-12-21 21:20:06,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3225022] [2020-12-21 21:20:06,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:06,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:06,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:06,937 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand 26 states. [2020-12-21 21:20:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:07,620 INFO L93 Difference]: Finished difference Result 193 states and 242 transitions. [2020-12-21 21:20:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-21 21:20:07,621 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2020-12-21 21:20:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:07,622 INFO L225 Difference]: With dead ends: 193 [2020-12-21 21:20:07,622 INFO L226 Difference]: Without dead ends: 125 [2020-12-21 21:20:07,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=1722, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:20:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-21 21:20:07,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2020-12-21 21:20:07,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-21 21:20:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2020-12-21 21:20:07,628 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 63 [2020-12-21 21:20:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:07,629 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2020-12-21 21:20:07,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2020-12-21 21:20:07,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-21 21:20:07,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:07,630 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:07,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-21 21:20:07,844 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:07,845 INFO L82 PathProgramCache]: Analyzing trace with hash -412880559, now seen corresponding path program 13 times [2020-12-21 21:20:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:07,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016638427] [2020-12-21 21:20:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016638427] [2020-12-21 21:20:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436257539] [2020-12-21 21:20:08,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-21 21:20:08,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:08,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:08,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-21 21:20:08,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803545593] [2020-12-21 21:20:08,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-21 21:20:08,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-21 21:20:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:08,362 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand 22 states. [2020-12-21 21:20:08,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:08,435 INFO L93 Difference]: Finished difference Result 190 states and 236 transitions. [2020-12-21 21:20:08,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-21 21:20:08,435 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 68 [2020-12-21 21:20:08,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:08,436 INFO L225 Difference]: With dead ends: 190 [2020-12-21 21:20:08,436 INFO L226 Difference]: Without dead ends: 116 [2020-12-21 21:20:08,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-21 21:20:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-21 21:20:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-21 21:20:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-21 21:20:08,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2020-12-21 21:20:08,443 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 68 [2020-12-21 21:20:08,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:08,443 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2020-12-21 21:20:08,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-21 21:20:08,443 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2020-12-21 21:20:08,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-21 21:20:08,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:08,444 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:08,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-21 21:20:08,658 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1841030483, now seen corresponding path program 14 times [2020-12-21 21:20:08,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:08,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883861850] [2020-12-21 21:20:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:08,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883861850] [2020-12-21 21:20:08,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048315561] [2020-12-21 21:20:08,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:09,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:09,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:09,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-21 21:20:09,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967259919] [2020-12-21 21:20:09,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-21 21:20:09,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:09,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-21 21:20:09,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:09,111 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 23 states. [2020-12-21 21:20:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:09,179 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2020-12-21 21:20:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-21 21:20:09,179 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 70 [2020-12-21 21:20:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:09,180 INFO L225 Difference]: With dead ends: 192 [2020-12-21 21:20:09,180 INFO L226 Difference]: Without dead ends: 118 [2020-12-21 21:20:09,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-21 21:20:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-21 21:20:09,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-21 21:20:09,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-21 21:20:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 140 transitions. [2020-12-21 21:20:09,187 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 140 transitions. Word has length 70 [2020-12-21 21:20:09,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:09,187 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 140 transitions. [2020-12-21 21:20:09,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-21 21:20:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 140 transitions. [2020-12-21 21:20:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-21 21:20:09,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:09,188 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:09,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-21 21:20:09,403 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:09,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:09,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1108942635, now seen corresponding path program 15 times [2020-12-21 21:20:09,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:09,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180594391] [2020-12-21 21:20:09,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:09,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-21 21:20:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180594391] [2020-12-21 21:20:09,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278889053] [2020-12-21 21:20:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:09,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:20:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:20:09,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:10,069 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2020-12-21 21:20:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 9] total 30 [2020-12-21 21:20:10,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205331558] [2020-12-21 21:20:10,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-21 21:20:10,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:10,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-21 21:20:10,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2020-12-21 21:20:10,071 INFO L87 Difference]: Start difference. First operand 117 states and 140 transitions. Second operand 30 states. [2020-12-21 21:20:10,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:10,987 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2020-12-21 21:20:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:20:10,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-12-21 21:20:10,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:10,989 INFO L225 Difference]: With dead ends: 211 [2020-12-21 21:20:10,989 INFO L226 Difference]: Without dead ends: 137 [2020-12-21 21:20:10,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2020-12-21 21:20:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-21 21:20:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2020-12-21 21:20:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-21 21:20:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-12-21 21:20:10,996 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 72 [2020-12-21 21:20:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:10,997 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-12-21 21:20:10,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-21 21:20:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-12-21 21:20:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:20:10,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:10,998 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:11,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,212 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:11,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:11,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1355141543, now seen corresponding path program 16 times [2020-12-21 21:20:11,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:11,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309583712] [2020-12-21 21:20:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:11,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309583712] [2020-12-21 21:20:11,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979100876] [2020-12-21 21:20:11,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:11,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:11,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-21 21:20:11,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:11,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:11,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-21 21:20:11,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038612272] [2020-12-21 21:20:11,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-21 21:20:11,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:11,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-21 21:20:11,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:11,743 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 25 states. [2020-12-21 21:20:11,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:11,851 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2020-12-21 21:20:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-21 21:20:11,851 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-12-21 21:20:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:11,852 INFO L225 Difference]: With dead ends: 208 [2020-12-21 21:20:11,852 INFO L226 Difference]: Without dead ends: 128 [2020-12-21 21:20:11,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-21 21:20:11,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-21 21:20:11,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-21 21:20:11,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-21 21:20:11,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 152 transitions. [2020-12-21 21:20:11,859 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 152 transitions. Word has length 77 [2020-12-21 21:20:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:11,859 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 152 transitions. [2020-12-21 21:20:11,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-21 21:20:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 152 transitions. [2020-12-21 21:20:11,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:20:11,860 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:11,861 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:12,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-21 21:20:12,074 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:12,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1126669463, now seen corresponding path program 17 times [2020-12-21 21:20:12,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:12,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57876590] [2020-12-21 21:20:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:12,431 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:12,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57876590] [2020-12-21 21:20:12,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609205276] [2020-12-21 21:20:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:13,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2020-12-21 21:20:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-21 21:20:13,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:13,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:13,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-21 21:20:13,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809900390] [2020-12-21 21:20:13,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-21 21:20:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:13,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-21 21:20:13,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:13,399 INFO L87 Difference]: Start difference. First operand 127 states and 152 transitions. Second operand 26 states. [2020-12-21 21:20:13,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:13,485 INFO L93 Difference]: Finished difference Result 210 states and 260 transitions. [2020-12-21 21:20:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-21 21:20:13,486 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 79 [2020-12-21 21:20:13,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:13,486 INFO L225 Difference]: With dead ends: 210 [2020-12-21 21:20:13,487 INFO L226 Difference]: Without dead ends: 130 [2020-12-21 21:20:13,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-21 21:20:13,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-21 21:20:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-21 21:20:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-21 21:20:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 154 transitions. [2020-12-21 21:20:13,493 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 154 transitions. Word has length 79 [2020-12-21 21:20:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:13,493 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 154 transitions. [2020-12-21 21:20:13,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-21 21:20:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 154 transitions. [2020-12-21 21:20:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-21 21:20:13,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:13,494 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:13,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:13,707 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:13,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:13,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1854770347, now seen corresponding path program 18 times [2020-12-21 21:20:13,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:13,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487686049] [2020-12-21 21:20:13,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-12-21 21:20:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487686049] [2020-12-21 21:20:14,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841231033] [2020-12-21 21:20:14,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:14,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-21 21:20:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:20:14,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 531 trivial. 0 not checked. [2020-12-21 21:20:14,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:14,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2020-12-21 21:20:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075788209] [2020-12-21 21:20:14,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:20:14,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:14,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:20:14,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=760, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:14,726 INFO L87 Difference]: Start difference. First operand 129 states and 154 transitions. Second operand 34 states. [2020-12-21 21:20:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:15,766 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2020-12-21 21:20:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:15,767 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 81 [2020-12-21 21:20:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:15,768 INFO L225 Difference]: With dead ends: 229 [2020-12-21 21:20:15,768 INFO L226 Difference]: Without dead ends: 149 [2020-12-21 21:20:15,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1080, Invalid=3080, Unknown=0, NotChecked=0, Total=4160 [2020-12-21 21:20:15,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-21 21:20:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 137. [2020-12-21 21:20:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-21 21:20:15,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 164 transitions. [2020-12-21 21:20:15,782 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 164 transitions. Word has length 81 [2020-12-21 21:20:15,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:15,782 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 164 transitions. [2020-12-21 21:20:15,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:20:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 164 transitions. [2020-12-21 21:20:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-21 21:20:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:15,783 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:15,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-21 21:20:15,990 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:15,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -2024057315, now seen corresponding path program 19 times [2020-12-21 21:20:15,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:15,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804040377] [2020-12-21 21:20:15,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,404 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804040377] [2020-12-21 21:20:16,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951563514] [2020-12-21 21:20:16,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-21 21:20:16,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:16,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:16,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-21 21:20:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591239285] [2020-12-21 21:20:16,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-21 21:20:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-21 21:20:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:16,613 INFO L87 Difference]: Start difference. First operand 137 states and 164 transitions. Second operand 28 states. [2020-12-21 21:20:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:16,720 INFO L93 Difference]: Finished difference Result 226 states and 280 transitions. [2020-12-21 21:20:16,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-21 21:20:16,720 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 86 [2020-12-21 21:20:16,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:16,722 INFO L225 Difference]: With dead ends: 226 [2020-12-21 21:20:16,722 INFO L226 Difference]: Without dead ends: 140 [2020-12-21 21:20:16,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-21 21:20:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-21 21:20:16,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-21 21:20:16,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-21 21:20:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 166 transitions. [2020-12-21 21:20:16,731 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 166 transitions. Word has length 86 [2020-12-21 21:20:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:16,732 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 166 transitions. [2020-12-21 21:20:16,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-21 21:20:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 166 transitions. [2020-12-21 21:20:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-21 21:20:16,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:16,733 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:16,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:16,947 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:16,948 INFO L82 PathProgramCache]: Analyzing trace with hash -965538401, now seen corresponding path program 20 times [2020-12-21 21:20:16,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:16,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281360077] [2020-12-21 21:20:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281360077] [2020-12-21 21:20:17,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355722203] [2020-12-21 21:20:17,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:17,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:17,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:17,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-21 21:20:17,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:17,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:17,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-21 21:20:17,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435868845] [2020-12-21 21:20:17,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-21 21:20:17,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:17,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-21 21:20:17,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:17,652 INFO L87 Difference]: Start difference. First operand 139 states and 166 transitions. Second operand 29 states. [2020-12-21 21:20:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:17,748 INFO L93 Difference]: Finished difference Result 228 states and 282 transitions. [2020-12-21 21:20:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-21 21:20:17,748 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 88 [2020-12-21 21:20:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:17,749 INFO L225 Difference]: With dead ends: 228 [2020-12-21 21:20:17,749 INFO L226 Difference]: Without dead ends: 142 [2020-12-21 21:20:17,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-21 21:20:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-21 21:20:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-21 21:20:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-21 21:20:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 168 transitions. [2020-12-21 21:20:17,757 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 168 transitions. Word has length 88 [2020-12-21 21:20:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:17,757 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 168 transitions. [2020-12-21 21:20:17,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-21 21:20:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 168 transitions. [2020-12-21 21:20:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-21 21:20:17,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:17,758 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:17,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-21 21:20:17,974 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:17,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1636111199, now seen corresponding path program 21 times [2020-12-21 21:20:17,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:17,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957542409] [2020-12-21 21:20:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:20:18,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957542409] [2020-12-21 21:20:18,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821080291] [2020-12-21 21:20:18,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:18,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-21 21:20:18,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:18,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:20:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:18,925 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 678 trivial. 0 not checked. [2020-12-21 21:20:18,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:18,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11] total 38 [2020-12-21 21:20:18,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601194484] [2020-12-21 21:20:18,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:18,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:18,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:18,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=954, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:18,928 INFO L87 Difference]: Start difference. First operand 141 states and 168 transitions. Second operand 38 states. [2020-12-21 21:20:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:20,245 INFO L93 Difference]: Finished difference Result 247 states and 308 transitions. [2020-12-21 21:20:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-21 21:20:20,246 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-12-21 21:20:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:20,247 INFO L225 Difference]: With dead ends: 247 [2020-12-21 21:20:20,247 INFO L226 Difference]: Without dead ends: 161 [2020-12-21 21:20:20,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1350, Invalid=3906, Unknown=0, NotChecked=0, Total=5256 [2020-12-21 21:20:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-21 21:20:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 149. [2020-12-21 21:20:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-21 21:20:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 178 transitions. [2020-12-21 21:20:20,255 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 178 transitions. Word has length 90 [2020-12-21 21:20:20,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:20,255 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 178 transitions. [2020-12-21 21:20:20,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:20,255 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 178 transitions. [2020-12-21 21:20:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-21 21:20:20,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:20,256 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:20,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:20,470 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1403538317, now seen corresponding path program 22 times [2020-12-21 21:20:20,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:20,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341641395] [2020-12-21 21:20:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:21,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341641395] [2020-12-21 21:20:21,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245145115] [2020-12-21 21:20:21,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:21,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:21,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-21 21:20:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:21,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:21,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-21 21:20:21,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998057049] [2020-12-21 21:20:21,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-21 21:20:21,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:21,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-21 21:20:21,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:21,221 INFO L87 Difference]: Start difference. First operand 149 states and 178 transitions. Second operand 31 states. [2020-12-21 21:20:21,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:21,328 INFO L93 Difference]: Finished difference Result 244 states and 302 transitions. [2020-12-21 21:20:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-21 21:20:21,329 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 95 [2020-12-21 21:20:21,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:21,330 INFO L225 Difference]: With dead ends: 244 [2020-12-21 21:20:21,330 INFO L226 Difference]: Without dead ends: 152 [2020-12-21 21:20:21,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-21 21:20:21,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-21 21:20:21,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-21 21:20:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-21 21:20:21,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 180 transitions. [2020-12-21 21:20:21,338 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 180 transitions. Word has length 95 [2020-12-21 21:20:21,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:21,338 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 180 transitions. [2020-12-21 21:20:21,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-21 21:20:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 180 transitions. [2020-12-21 21:20:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-21 21:20:21,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:21,339 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:21,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-21 21:20:21,554 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1415977397, now seen corresponding path program 23 times [2020-12-21 21:20:21,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:21,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724518404] [2020-12-21 21:20:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:22,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724518404] [2020-12-21 21:20:22,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495225088] [2020-12-21 21:20:22,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:24,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2020-12-21 21:20:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:24,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-21 21:20:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:24,468 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:24,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:24,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-21 21:20:24,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854945054] [2020-12-21 21:20:24,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-21 21:20:24,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:24,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-21 21:20:24,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:24,470 INFO L87 Difference]: Start difference. First operand 151 states and 180 transitions. Second operand 32 states. [2020-12-21 21:20:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:24,612 INFO L93 Difference]: Finished difference Result 246 states and 304 transitions. [2020-12-21 21:20:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-21 21:20:24,612 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 97 [2020-12-21 21:20:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:24,614 INFO L225 Difference]: With dead ends: 246 [2020-12-21 21:20:24,614 INFO L226 Difference]: Without dead ends: 154 [2020-12-21 21:20:24,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-21 21:20:24,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-21 21:20:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-21 21:20:24,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-21 21:20:24,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 182 transitions. [2020-12-21 21:20:24,621 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 182 transitions. Word has length 97 [2020-12-21 21:20:24,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:24,622 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 182 transitions. [2020-12-21 21:20:24,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-21 21:20:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 182 transitions. [2020-12-21 21:20:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-21 21:20:24,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:24,623 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:24,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:24,837 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -846214775, now seen corresponding path program 24 times [2020-12-21 21:20:24,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45077798] [2020-12-21 21:20:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-12-21 21:20:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45077798] [2020-12-21 21:20:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265111404] [2020-12-21 21:20:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:25,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-12-21 21:20:25,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:20:25,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 935 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 843 trivial. 0 not checked. [2020-12-21 21:20:26,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:26,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2020-12-21 21:20:26,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140479283] [2020-12-21 21:20:26,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-21 21:20:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-21 21:20:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1170, Unknown=0, NotChecked=0, Total=1722 [2020-12-21 21:20:26,271 INFO L87 Difference]: Start difference. First operand 153 states and 182 transitions. Second operand 42 states. [2020-12-21 21:20:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:27,771 INFO L93 Difference]: Finished difference Result 265 states and 330 transitions. [2020-12-21 21:20:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:20:27,771 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 99 [2020-12-21 21:20:27,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:27,773 INFO L225 Difference]: With dead ends: 265 [2020-12-21 21:20:27,773 INFO L226 Difference]: Without dead ends: 173 [2020-12-21 21:20:27,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1650, Invalid=4830, Unknown=0, NotChecked=0, Total=6480 [2020-12-21 21:20:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-21 21:20:27,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2020-12-21 21:20:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-21 21:20:27,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2020-12-21 21:20:27,784 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 99 [2020-12-21 21:20:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:27,785 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2020-12-21 21:20:27,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-21 21:20:27,785 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2020-12-21 21:20:27,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-21 21:20:27,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:27,786 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:28,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-21 21:20:28,001 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:28,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:28,002 INFO L82 PathProgramCache]: Analyzing trace with hash 890676969, now seen corresponding path program 25 times [2020-12-21 21:20:28,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:28,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484006570] [2020-12-21 21:20:28,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:28,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:28,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484006570] [2020-12-21 21:20:28,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622095408] [2020-12-21 21:20:28,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-21 21:20:28,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:28,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:28,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:28,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-21 21:20:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795671182] [2020-12-21 21:20:28,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-21 21:20:28,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:28,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-21 21:20:28,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:28,907 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand 34 states. [2020-12-21 21:20:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:29,056 INFO L93 Difference]: Finished difference Result 262 states and 324 transitions. [2020-12-21 21:20:29,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-21 21:20:29,061 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 104 [2020-12-21 21:20:29,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:29,063 INFO L225 Difference]: With dead ends: 262 [2020-12-21 21:20:29,063 INFO L226 Difference]: Without dead ends: 164 [2020-12-21 21:20:29,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-21 21:20:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-21 21:20:29,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-21 21:20:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-21 21:20:29,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2020-12-21 21:20:29,072 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 104 [2020-12-21 21:20:29,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:29,072 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-12-21 21:20:29,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-21 21:20:29,072 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2020-12-21 21:20:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-21 21:20:29,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:29,073 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:29,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-21 21:20:29,287 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1194049045, now seen corresponding path program 26 times [2020-12-21 21:20:29,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:29,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600817297] [2020-12-21 21:20:29,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:29,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600817297] [2020-12-21 21:20:29,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050122330] [2020-12-21 21:20:29,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:30,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:30,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-21 21:20:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:30,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:30,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-21 21:20:30,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226769375] [2020-12-21 21:20:30,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-21 21:20:30,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:30,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-21 21:20:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:30,222 INFO L87 Difference]: Start difference. First operand 163 states and 194 transitions. Second operand 35 states. [2020-12-21 21:20:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:30,360 INFO L93 Difference]: Finished difference Result 264 states and 326 transitions. [2020-12-21 21:20:30,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-21 21:20:30,361 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 106 [2020-12-21 21:20:30,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:30,363 INFO L225 Difference]: With dead ends: 264 [2020-12-21 21:20:30,363 INFO L226 Difference]: Without dead ends: 166 [2020-12-21 21:20:30,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-21 21:20:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-21 21:20:30,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-21 21:20:30,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-21 21:20:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 196 transitions. [2020-12-21 21:20:30,371 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 196 transitions. Word has length 106 [2020-12-21 21:20:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:30,372 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 196 transitions. [2020-12-21 21:20:30,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-21 21:20:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 196 transitions. [2020-12-21 21:20:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-21 21:20:30,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:30,373 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:30,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-21 21:20:30,588 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:30,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1133978733, now seen corresponding path program 27 times [2020-12-21 21:20:30,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:30,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244915220] [2020-12-21 21:20:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-12-21 21:20:31,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244915220] [2020-12-21 21:20:31,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734278347] [2020-12-21 21:20:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:31,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-21 21:20:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:20:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:31,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1026 trivial. 0 not checked. [2020-12-21 21:20:31,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:31,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 13] total 46 [2020-12-21 21:20:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654655864] [2020-12-21 21:20:31,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:20:31,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:20:31,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=662, Invalid=1408, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:20:31,894 INFO L87 Difference]: Start difference. First operand 165 states and 196 transitions. Second operand 46 states. [2020-12-21 21:20:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:33,788 INFO L93 Difference]: Finished difference Result 283 states and 352 transitions. [2020-12-21 21:20:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:20:33,789 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 108 [2020-12-21 21:20:33,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:33,790 INFO L225 Difference]: With dead ends: 283 [2020-12-21 21:20:33,790 INFO L226 Difference]: Without dead ends: 185 [2020-12-21 21:20:33,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1255 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1980, Invalid=5852, Unknown=0, NotChecked=0, Total=7832 [2020-12-21 21:20:33,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-21 21:20:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2020-12-21 21:20:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-21 21:20:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 206 transitions. [2020-12-21 21:20:33,799 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 206 transitions. Word has length 108 [2020-12-21 21:20:33,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:33,800 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 206 transitions. [2020-12-21 21:20:33,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:20:33,800 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 206 transitions. [2020-12-21 21:20:33,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-21 21:20:33,800 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:33,801 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:34,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-21 21:20:34,017 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:34,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:34,018 INFO L82 PathProgramCache]: Analyzing trace with hash 629447873, now seen corresponding path program 28 times [2020-12-21 21:20:34,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:34,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339028392] [2020-12-21 21:20:34,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:34,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339028392] [2020-12-21 21:20:34,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535552162] [2020-12-21 21:20:34,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:34,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:34,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-21 21:20:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:35,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:35,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-21 21:20:35,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562769967] [2020-12-21 21:20:35,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-21 21:20:35,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:35,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-21 21:20:35,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:35,029 INFO L87 Difference]: Start difference. First operand 173 states and 206 transitions. Second operand 37 states. [2020-12-21 21:20:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:35,194 INFO L93 Difference]: Finished difference Result 280 states and 346 transitions. [2020-12-21 21:20:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-21 21:20:35,194 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 113 [2020-12-21 21:20:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:35,196 INFO L225 Difference]: With dead ends: 280 [2020-12-21 21:20:35,196 INFO L226 Difference]: Without dead ends: 176 [2020-12-21 21:20:35,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-21 21:20:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-21 21:20:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-21 21:20:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-21 21:20:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2020-12-21 21:20:35,204 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 113 [2020-12-21 21:20:35,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:35,204 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2020-12-21 21:20:35,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-21 21:20:35,204 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2020-12-21 21:20:35,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-21 21:20:35,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:35,205 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-21 21:20:35,420 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -428325889, now seen corresponding path program 29 times [2020-12-21 21:20:35,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:35,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692136055] [2020-12-21 21:20:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:36,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692136055] [2020-12-21 21:20:36,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9823100] [2020-12-21 21:20:36,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:38,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2020-12-21 21:20:38,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:38,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-21 21:20:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1303 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:38,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:38,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-21 21:20:38,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448708693] [2020-12-21 21:20:38,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-21 21:20:38,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:38,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-21 21:20:38,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:38,552 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand 38 states. [2020-12-21 21:20:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:38,688 INFO L93 Difference]: Finished difference Result 282 states and 348 transitions. [2020-12-21 21:20:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-21 21:20:38,688 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 115 [2020-12-21 21:20:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:38,689 INFO L225 Difference]: With dead ends: 282 [2020-12-21 21:20:38,689 INFO L226 Difference]: Without dead ends: 178 [2020-12-21 21:20:38,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-21 21:20:38,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-21 21:20:38,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-21 21:20:38,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-21 21:20:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-21 21:20:38,698 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 115 [2020-12-21 21:20:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:38,698 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-21 21:20:38,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-21 21:20:38,698 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-21 21:20:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-21 21:20:38,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:38,699 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:38,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-21 21:20:38,912 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 958337981, now seen corresponding path program 30 times [2020-12-21 21:20:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000376727] [2020-12-21 21:20:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-12-21 21:20:39,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000376727] [2020-12-21 21:20:39,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206240806] [2020-12-21 21:20:39,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:40,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2020-12-21 21:20:40,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-21 21:20:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2020-12-21 21:20:40,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:40,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 14] total 50 [2020-12-21 21:20:40,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444873210] [2020-12-21 21:20:40,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:20:40,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:40,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:20:40,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=1668, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:20:40,925 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 50 states. [2020-12-21 21:20:43,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:43,077 INFO L93 Difference]: Finished difference Result 301 states and 374 transitions. [2020-12-21 21:20:43,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-21 21:20:43,081 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 117 [2020-12-21 21:20:43,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:43,083 INFO L225 Difference]: With dead ends: 301 [2020-12-21 21:20:43,083 INFO L226 Difference]: Without dead ends: 197 [2020-12-21 21:20:43,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1501 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2340, Invalid=6972, Unknown=0, NotChecked=0, Total=9312 [2020-12-21 21:20:43,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-21 21:20:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 185. [2020-12-21 21:20:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-21 21:20:43,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 220 transitions. [2020-12-21 21:20:43,092 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 220 transitions. Word has length 117 [2020-12-21 21:20:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:43,092 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 220 transitions. [2020-12-21 21:20:43,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:20:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 220 transitions. [2020-12-21 21:20:43,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-21 21:20:43,093 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:43,094 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:43,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-21 21:20:43,307 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:43,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1548854197, now seen corresponding path program 31 times [2020-12-21 21:20:43,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:43,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515222777] [2020-12-21 21:20:43,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:44,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515222777] [2020-12-21 21:20:44,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847059234] [2020-12-21 21:20:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-21 21:20:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:44,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:44,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-21 21:20:44,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074521163] [2020-12-21 21:20:44,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-21 21:20:44,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-21 21:20:44,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:44,503 INFO L87 Difference]: Start difference. First operand 185 states and 220 transitions. Second operand 40 states. [2020-12-21 21:20:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:44,688 INFO L93 Difference]: Finished difference Result 298 states and 368 transitions. [2020-12-21 21:20:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-21 21:20:44,688 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 122 [2020-12-21 21:20:44,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:44,690 INFO L225 Difference]: With dead ends: 298 [2020-12-21 21:20:44,690 INFO L226 Difference]: Without dead ends: 188 [2020-12-21 21:20:44,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-21 21:20:44,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-21 21:20:44,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-21 21:20:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-21 21:20:44,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-12-21 21:20:44,698 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 122 [2020-12-21 21:20:44,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:44,699 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-12-21 21:20:44,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-21 21:20:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-12-21 21:20:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-21 21:20:44,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:44,700 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:44,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:44,909 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:44,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:44,910 INFO L82 PathProgramCache]: Analyzing trace with hash 257114679, now seen corresponding path program 32 times [2020-12-21 21:20:44,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:44,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023988347] [2020-12-21 21:20:44,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023988347] [2020-12-21 21:20:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381593847] [2020-12-21 21:20:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:46,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:20:46,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:46,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-21 21:20:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:46,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1547 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:46,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:46,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-21 21:20:46,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312693696] [2020-12-21 21:20:46,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-21 21:20:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-21 21:20:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:46,222 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 41 states. [2020-12-21 21:20:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:46,390 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-12-21 21:20:46,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-21 21:20:46,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 124 [2020-12-21 21:20:46,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:46,394 INFO L225 Difference]: With dead ends: 300 [2020-12-21 21:20:46,394 INFO L226 Difference]: Without dead ends: 190 [2020-12-21 21:20:46,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-21 21:20:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-21 21:20:46,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-21 21:20:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-21 21:20:46,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 224 transitions. [2020-12-21 21:20:46,401 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 224 transitions. Word has length 124 [2020-12-21 21:20:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:46,402 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 224 transitions. [2020-12-21 21:20:46,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-21 21:20:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 224 transitions. [2020-12-21 21:20:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-21 21:20:46,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:46,403 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:46,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:46,618 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:46,618 INFO L82 PathProgramCache]: Analyzing trace with hash 140986425, now seen corresponding path program 33 times [2020-12-21 21:20:46,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:46,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899694825] [2020-12-21 21:20:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2020-12-21 21:20:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899694825] [2020-12-21 21:20:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174702343] [2020-12-21 21:20:47,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:47,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-12-21 21:20:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:47,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-21 21:20:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1622 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1446 trivial. 0 not checked. [2020-12-21 21:20:48,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:48,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2020-12-21 21:20:48,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448304556] [2020-12-21 21:20:48,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-21 21:20:48,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:48,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-21 21:20:48,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1950, Unknown=0, NotChecked=0, Total=2862 [2020-12-21 21:20:48,473 INFO L87 Difference]: Start difference. First operand 189 states and 224 transitions. Second operand 54 states. [2020-12-21 21:20:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:50,900 INFO L93 Difference]: Finished difference Result 319 states and 396 transitions. [2020-12-21 21:20:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-21 21:20:50,901 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 126 [2020-12-21 21:20:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:50,902 INFO L225 Difference]: With dead ends: 319 [2020-12-21 21:20:50,902 INFO L226 Difference]: Without dead ends: 209 [2020-12-21 21:20:50,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2730, Invalid=8190, Unknown=0, NotChecked=0, Total=10920 [2020-12-21 21:20:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-21 21:20:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2020-12-21 21:20:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-21 21:20:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-12-21 21:20:50,911 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 126 [2020-12-21 21:20:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:50,912 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-12-21 21:20:50,912 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-21 21:20:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-12-21 21:20:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-21 21:20:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:50,913 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:51,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:51,127 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:51,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:51,128 INFO L82 PathProgramCache]: Analyzing trace with hash -279748107, now seen corresponding path program 34 times [2020-12-21 21:20:51,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:51,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879398847] [2020-12-21 21:20:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:51,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:20:52,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879398847] [2020-12-21 21:20:52,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88576374] [2020-12-21 21:20:52,252 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:20:52,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:20:52,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:20:52,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-21 21:20:52,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:20:52,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1733 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:20:52,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:20:52,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-21 21:20:52,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520830367] [2020-12-21 21:20:52,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-21 21:20:52,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:20:52,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-21 21:20:52,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:20:52,548 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 43 states. [2020-12-21 21:20:52,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:20:52,734 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2020-12-21 21:20:52,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-21 21:20:52,734 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 131 [2020-12-21 21:20:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:20:52,736 INFO L225 Difference]: With dead ends: 316 [2020-12-21 21:20:52,736 INFO L226 Difference]: Without dead ends: 200 [2020-12-21 21:20:52,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-21 21:20:52,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-21 21:20:52,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2020-12-21 21:20:52,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-21 21:20:52,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 236 transitions. [2020-12-21 21:20:52,744 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 236 transitions. Word has length 131 [2020-12-21 21:20:52,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:20:52,745 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 236 transitions. [2020-12-21 21:20:52,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-21 21:20:52,745 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 236 transitions. [2020-12-21 21:20:52,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-21 21:20:52,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:20:52,746 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:20:52,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-21 21:20:52,961 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:20:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:20:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1854862771, now seen corresponding path program 35 times [2020-12-21 21:20:52,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:20:52,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368353639] [2020-12-21 21:20:52,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:20:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:20:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:20:54,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368353639] [2020-12-21 21:20:54,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364857352] [2020-12-21 21:20:54,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:12,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2020-12-21 21:21:12,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-21 21:21:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1812 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:12,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:12,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-21 21:21:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568456895] [2020-12-21 21:21:12,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-21 21:21:12,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:12,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-21 21:21:12,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:12,841 INFO L87 Difference]: Start difference. First operand 199 states and 236 transitions. Second operand 44 states. [2020-12-21 21:21:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:13,024 INFO L93 Difference]: Finished difference Result 318 states and 392 transitions. [2020-12-21 21:21:13,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-21 21:21:13,025 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 133 [2020-12-21 21:21:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:13,026 INFO L225 Difference]: With dead ends: 318 [2020-12-21 21:21:13,026 INFO L226 Difference]: Without dead ends: 202 [2020-12-21 21:21:13,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-21 21:21:13,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-21 21:21:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2020-12-21 21:21:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-12-21 21:21:13,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2020-12-21 21:21:13,034 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 133 [2020-12-21 21:21:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:13,034 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2020-12-21 21:21:13,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-21 21:21:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2020-12-21 21:21:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-21 21:21:13,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:13,035 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:13,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:13,248 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:13,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:13,249 INFO L82 PathProgramCache]: Analyzing trace with hash 221549041, now seen corresponding path program 36 times [2020-12-21 21:21:13,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:13,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920059869] [2020-12-21 21:21:13,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:14,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2020-12-21 21:21:14,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920059869] [2020-12-21 21:21:14,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801140848] [2020-12-21 21:21:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:16,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-21 21:21:16,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-21 21:21:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2020-12-21 21:21:17,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:17,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 16] total 58 [2020-12-21 21:21:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297760813] [2020-12-21 21:21:17,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-21 21:21:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:17,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-21 21:21:17,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1052, Invalid=2254, Unknown=0, NotChecked=0, Total=3306 [2020-12-21 21:21:17,175 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand 58 states. [2020-12-21 21:21:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:20,165 INFO L93 Difference]: Finished difference Result 337 states and 418 transitions. [2020-12-21 21:21:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-21 21:21:20,166 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 135 [2020-12-21 21:21:20,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:20,167 INFO L225 Difference]: With dead ends: 337 [2020-12-21 21:21:20,167 INFO L226 Difference]: Without dead ends: 221 [2020-12-21 21:21:20,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3150, Invalid=9506, Unknown=0, NotChecked=0, Total=12656 [2020-12-21 21:21:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-21 21:21:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 209. [2020-12-21 21:21:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-12-21 21:21:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 248 transitions. [2020-12-21 21:21:20,178 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 248 transitions. Word has length 135 [2020-12-21 21:21:20,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:20,179 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 248 transitions. [2020-12-21 21:21:20,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-21 21:21:20,179 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 248 transitions. [2020-12-21 21:21:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-21 21:21:20,180 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:20,180 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:20,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:20,394 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:20,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:20,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1195904129, now seen corresponding path program 37 times [2020-12-21 21:21:20,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:20,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387543187] [2020-12-21 21:21:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:21,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:21:21,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387543187] [2020-12-21 21:21:21,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015318464] [2020-12-21 21:21:21,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:21,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-21 21:21:21,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2013 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:21:22,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:22,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-21 21:21:22,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562674898] [2020-12-21 21:21:22,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-21 21:21:22,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:22,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-21 21:21:22,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:22,068 INFO L87 Difference]: Start difference. First operand 209 states and 248 transitions. Second operand 46 states. [2020-12-21 21:21:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:22,253 INFO L93 Difference]: Finished difference Result 334 states and 412 transitions. [2020-12-21 21:21:22,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-21 21:21:22,254 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 140 [2020-12-21 21:21:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:22,255 INFO L225 Difference]: With dead ends: 334 [2020-12-21 21:21:22,255 INFO L226 Difference]: Without dead ends: 212 [2020-12-21 21:21:22,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-21 21:21:22,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-21 21:21:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2020-12-21 21:21:22,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-21 21:21:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 250 transitions. [2020-12-21 21:21:22,265 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 250 transitions. Word has length 140 [2020-12-21 21:21:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:22,265 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 250 transitions. [2020-12-21 21:21:22,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-21 21:21:22,266 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 250 transitions. [2020-12-21 21:21:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-21 21:21:22,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:22,267 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:22,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-21 21:21:22,482 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:22,483 INFO L82 PathProgramCache]: Analyzing trace with hash 887344771, now seen corresponding path program 38 times [2020-12-21 21:21:22,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:22,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661801655] [2020-12-21 21:21:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:21:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661801655] [2020-12-21 21:21:23,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772503050] [2020-12-21 21:21:23,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:24,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:21:24,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:24,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-21 21:21:24,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2098 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:21:24,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:24,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-21 21:21:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619926213] [2020-12-21 21:21:24,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-21 21:21:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-21 21:21:24,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:21:24,251 INFO L87 Difference]: Start difference. First operand 211 states and 250 transitions. Second operand 47 states. [2020-12-21 21:21:24,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:24,476 INFO L93 Difference]: Finished difference Result 336 states and 414 transitions. [2020-12-21 21:21:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-21 21:21:24,477 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 142 [2020-12-21 21:21:24,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:24,478 INFO L225 Difference]: With dead ends: 336 [2020-12-21 21:21:24,478 INFO L226 Difference]: Without dead ends: 214 [2020-12-21 21:21:24,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-21 21:21:24,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-21 21:21:24,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2020-12-21 21:21:24,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-12-21 21:21:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 252 transitions. [2020-12-21 21:21:24,487 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 252 transitions. Word has length 142 [2020-12-21 21:21:24,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:24,487 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 252 transitions. [2020-12-21 21:21:24,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-21 21:21:24,488 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 252 transitions. [2020-12-21 21:21:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-21 21:21:24,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:24,489 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:24,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-21 21:21:24,704 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 714545157, now seen corresponding path program 39 times [2020-12-21 21:21:24,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:24,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908746866] [2020-12-21 21:21:24,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-12-21 21:21:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908746866] [2020-12-21 21:21:26,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398199741] [2020-12-21 21:21:26,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:26,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-21 21:21:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:26,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-21 21:21:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 1938 trivial. 0 not checked. [2020-12-21 21:21:27,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:27,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 17] total 62 [2020-12-21 21:21:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493348629] [2020-12-21 21:21:27,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-21 21:21:27,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-21 21:21:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=2580, Unknown=0, NotChecked=0, Total=3782 [2020-12-21 21:21:27,300 INFO L87 Difference]: Start difference. First operand 213 states and 252 transitions. Second operand 62 states. [2020-12-21 21:21:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:30,832 INFO L93 Difference]: Finished difference Result 355 states and 440 transitions. [2020-12-21 21:21:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-21 21:21:30,833 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 144 [2020-12-21 21:21:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:30,834 INFO L225 Difference]: With dead ends: 355 [2020-12-21 21:21:30,835 INFO L226 Difference]: Without dead ends: 233 [2020-12-21 21:21:30,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2371 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3600, Invalid=10920, Unknown=0, NotChecked=0, Total=14520 [2020-12-21 21:21:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-21 21:21:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 221. [2020-12-21 21:21:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-12-21 21:21:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 262 transitions. [2020-12-21 21:21:30,847 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 262 transitions. Word has length 144 [2020-12-21 21:21:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:30,848 INFO L481 AbstractCegarLoop]: Abstraction has 221 states and 262 transitions. [2020-12-21 21:21:30,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-21 21:21:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 262 transitions. [2020-12-21 21:21:30,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-12-21 21:21:30,849 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:30,849 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:31,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-21 21:21:31,065 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:31,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2028414167, now seen corresponding path program 40 times [2020-12-21 21:21:31,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:31,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829895727] [2020-12-21 21:21:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:21:32,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829895727] [2020-12-21 21:21:32,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846459276] [2020-12-21 21:21:32,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:32,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:21:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:21:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-21 21:21:32,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:21:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2314 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:21:32,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:21:32,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-21 21:21:32,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739666079] [2020-12-21 21:21:32,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-21 21:21:32,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:21:32,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-21 21:21:32,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:21:32,929 INFO L87 Difference]: Start difference. First operand 221 states and 262 transitions. Second operand 49 states. [2020-12-21 21:21:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:21:33,175 INFO L93 Difference]: Finished difference Result 352 states and 434 transitions. [2020-12-21 21:21:33,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-21 21:21:33,175 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 149 [2020-12-21 21:21:33,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:21:33,177 INFO L225 Difference]: With dead ends: 352 [2020-12-21 21:21:33,177 INFO L226 Difference]: Without dead ends: 224 [2020-12-21 21:21:33,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-21 21:21:33,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-21 21:21:33,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2020-12-21 21:21:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-12-21 21:21:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2020-12-21 21:21:33,186 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 149 [2020-12-21 21:21:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:21:33,186 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2020-12-21 21:21:33,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-21 21:21:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2020-12-21 21:21:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-21 21:21:33,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:21:33,188 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:21:33,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:21:33,403 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:21:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:21:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1210727271, now seen corresponding path program 41 times [2020-12-21 21:21:33,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:21:33,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293452424] [2020-12-21 21:21:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:21:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:21:35,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:21:35,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293452424] [2020-12-21 21:21:35,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038392766] [2020-12-21 21:21:35,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:35,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2020-12-21 21:22:35,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-21 21:22:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2405 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:22:35,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:35,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-21 21:22:35,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736570841] [2020-12-21 21:22:35,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-21 21:22:35,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:35,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-21 21:22:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:35,273 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand 50 states. [2020-12-21 21:22:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:35,506 INFO L93 Difference]: Finished difference Result 354 states and 436 transitions. [2020-12-21 21:22:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-21 21:22:35,507 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 151 [2020-12-21 21:22:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:35,509 INFO L225 Difference]: With dead ends: 354 [2020-12-21 21:22:35,509 INFO L226 Difference]: Without dead ends: 226 [2020-12-21 21:22:35,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-21 21:22:35,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-21 21:22:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2020-12-21 21:22:35,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-21 21:22:35,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 266 transitions. [2020-12-21 21:22:35,518 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 266 transitions. Word has length 151 [2020-12-21 21:22:35,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:35,519 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 266 transitions. [2020-12-21 21:22:35,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-21 21:22:35,519 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 266 transitions. [2020-12-21 21:22:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-21 21:22:35,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:35,520 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:35,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:35,733 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:35,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash 174359589, now seen corresponding path program 42 times [2020-12-21 21:22:35,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:35,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135821132] [2020-12-21 21:22:35,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-12-21 21:22:37,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135821132] [2020-12-21 21:22:37,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398063633] [2020-12-21 21:22:37,455 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:41,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2020-12-21 21:22:41,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:41,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-21 21:22:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2498 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2020-12-21 21:22:42,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:42,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 18] total 66 [2020-12-21 21:22:42,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970801675] [2020-12-21 21:22:42,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-21 21:22:42,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:42,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-21 21:22:42,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1362, Invalid=2928, Unknown=0, NotChecked=0, Total=4290 [2020-12-21 21:22:42,464 INFO L87 Difference]: Start difference. First operand 225 states and 266 transitions. Second operand 66 states. [2020-12-21 21:22:46,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:46,540 INFO L93 Difference]: Finished difference Result 373 states and 462 transitions. [2020-12-21 21:22:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-21 21:22:46,541 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 153 [2020-12-21 21:22:46,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:46,542 INFO L225 Difference]: With dead ends: 373 [2020-12-21 21:22:46,542 INFO L226 Difference]: Without dead ends: 245 [2020-12-21 21:22:46,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2705 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4080, Invalid=12432, Unknown=0, NotChecked=0, Total=16512 [2020-12-21 21:22:46,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-21 21:22:46,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 233. [2020-12-21 21:22:46,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-21 21:22:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 276 transitions. [2020-12-21 21:22:46,553 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 276 transitions. Word has length 153 [2020-12-21 21:22:46,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:46,554 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 276 transitions. [2020-12-21 21:22:46,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-21 21:22:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 276 transitions. [2020-12-21 21:22:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-21 21:22:46,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:46,555 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:46,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-21 21:22:46,770 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:46,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1253417293, now seen corresponding path program 43 times [2020-12-21 21:22:46,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:46,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009221971] [2020-12-21 21:22:46,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:22:48,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009221971] [2020-12-21 21:22:48,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950845574] [2020-12-21 21:22:48,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:48,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-21 21:22:48,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:22:48,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:48,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-21 21:22:48,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872742095] [2020-12-21 21:22:48,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-21 21:22:48,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-21 21:22:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:48,960 INFO L87 Difference]: Start difference. First operand 233 states and 276 transitions. Second operand 52 states. [2020-12-21 21:22:49,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:49,207 INFO L93 Difference]: Finished difference Result 370 states and 456 transitions. [2020-12-21 21:22:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-21 21:22:49,208 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 158 [2020-12-21 21:22:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:49,209 INFO L225 Difference]: With dead ends: 370 [2020-12-21 21:22:49,209 INFO L226 Difference]: Without dead ends: 236 [2020-12-21 21:22:49,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-21 21:22:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-12-21 21:22:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2020-12-21 21:22:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-21 21:22:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 278 transitions. [2020-12-21 21:22:49,219 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 278 transitions. Word has length 158 [2020-12-21 21:22:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:49,219 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 278 transitions. [2020-12-21 21:22:49,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-21 21:22:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 278 transitions. [2020-12-21 21:22:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-21 21:22:49,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:49,221 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:49,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:49,434 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -520509745, now seen corresponding path program 44 times [2020-12-21 21:22:49,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:49,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781692344] [2020-12-21 21:22:49,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:22:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781692344] [2020-12-21 21:22:51,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664060361] [2020-12-21 21:22:51,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:51,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:22:51,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:51,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-21 21:22:51,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2733 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:22:51,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:51,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-21 21:22:51,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544139060] [2020-12-21 21:22:51,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-21 21:22:51,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:51,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-21 21:22:51,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:51,777 INFO L87 Difference]: Start difference. First operand 235 states and 278 transitions. Second operand 53 states. [2020-12-21 21:22:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:52,026 INFO L93 Difference]: Finished difference Result 372 states and 458 transitions. [2020-12-21 21:22:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-21 21:22:52,027 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 160 [2020-12-21 21:22:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:52,028 INFO L225 Difference]: With dead ends: 372 [2020-12-21 21:22:52,028 INFO L226 Difference]: Without dead ends: 238 [2020-12-21 21:22:52,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-21 21:22:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-21 21:22:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2020-12-21 21:22:52,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-21 21:22:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 280 transitions. [2020-12-21 21:22:52,037 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 280 transitions. Word has length 160 [2020-12-21 21:22:52,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:22:52,038 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 280 transitions. [2020-12-21 21:22:52,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-21 21:22:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 280 transitions. [2020-12-21 21:22:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-21 21:22:52,039 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:22:52,039 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:22:52,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-21 21:22:52,254 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:22:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:22:52,255 INFO L82 PathProgramCache]: Analyzing trace with hash -162376751, now seen corresponding path program 45 times [2020-12-21 21:22:52,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:22:52,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624512563] [2020-12-21 21:22:52,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:22:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:22:54,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 332 trivial. 0 not checked. [2020-12-21 21:22:54,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624512563] [2020-12-21 21:22:54,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113159597] [2020-12-21 21:22:54,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:22:54,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-21 21:22:54,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:22:54,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-21 21:22:54,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:22:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2832 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 2502 trivial. 0 not checked. [2020-12-21 21:22:55,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:22:55,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 19] total 70 [2020-12-21 21:22:55,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924193771] [2020-12-21 21:22:55,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-21 21:22:55,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:22:55,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-21 21:22:55,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1532, Invalid=3298, Unknown=0, NotChecked=0, Total=4830 [2020-12-21 21:22:55,592 INFO L87 Difference]: Start difference. First operand 237 states and 280 transitions. Second operand 70 states. [2020-12-21 21:22:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:22:59,990 INFO L93 Difference]: Finished difference Result 391 states and 484 transitions. [2020-12-21 21:22:59,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-21 21:22:59,991 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 162 [2020-12-21 21:22:59,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:22:59,992 INFO L225 Difference]: With dead ends: 391 [2020-12-21 21:22:59,992 INFO L226 Difference]: Without dead ends: 257 [2020-12-21 21:22:59,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4590, Invalid=14042, Unknown=0, NotChecked=0, Total=18632 [2020-12-21 21:22:59,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-21 21:22:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 245. [2020-12-21 21:22:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-12-21 21:23:00,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 290 transitions. [2020-12-21 21:23:00,000 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 290 transitions. Word has length 162 [2020-12-21 21:23:00,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:00,000 INFO L481 AbstractCegarLoop]: Abstraction has 245 states and 290 transitions. [2020-12-21 21:23:00,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-21 21:23:00,000 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 290 transitions. [2020-12-21 21:23:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-21 21:23:00,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:00,001 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:00,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-21 21:23:00,202 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:00,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1571207075, now seen corresponding path program 46 times [2020-12-21 21:23:00,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:00,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061868085] [2020-12-21 21:23:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-21 21:23:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061868085] [2020-12-21 21:23:02,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469974761] [2020-12-21 21:23:02,302 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:23:02,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:23:02,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:23:02,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-21 21:23:02,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:23:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2979 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-21 21:23:02,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:23:02,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-21 21:23:02,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197831391] [2020-12-21 21:23:02,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-21 21:23:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:23:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-21 21:23:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:23:02,685 INFO L87 Difference]: Start difference. First operand 245 states and 290 transitions. Second operand 55 states. [2020-12-21 21:23:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:23:02,991 INFO L93 Difference]: Finished difference Result 388 states and 478 transitions. [2020-12-21 21:23:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-21 21:23:02,992 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 167 [2020-12-21 21:23:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:23:02,994 INFO L225 Difference]: With dead ends: 388 [2020-12-21 21:23:02,994 INFO L226 Difference]: Without dead ends: 248 [2020-12-21 21:23:02,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-21 21:23:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-21 21:23:03,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2020-12-21 21:23:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-21 21:23:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 292 transitions. [2020-12-21 21:23:03,006 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 292 transitions. Word has length 167 [2020-12-21 21:23:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:23:03,007 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 292 transitions. [2020-12-21 21:23:03,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-21 21:23:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 292 transitions. [2020-12-21 21:23:03,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-21 21:23:03,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:23:03,008 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 16, 16, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:23:03,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-21 21:23:03,224 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:23:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:23:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1427526939, now seen corresponding path program 47 times [2020-12-21 21:23:03,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:23:03,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22309745] [2020-12-21 21:23:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:23:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:23:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3082 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2020-12-21 21:23:05,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22309745] [2020-12-21 21:23:05,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884167141] [2020-12-21 21:23:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true