/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:06:26,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:06:26,614 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:06:26,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:06:26,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:06:26,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:06:26,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:06:26,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:06:26,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:06:26,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:06:26,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:06:26,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:06:26,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:06:26,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:06:26,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:06:26,659 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:06:26,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:06:26,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:06:26,664 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:06:26,667 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:06:26,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:06:26,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:06:26,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:06:26,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:06:26,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 22:06:26,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:06:26,691 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:06:26,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:06:26,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:06:26,707 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:06:26,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:06:26,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:06:26,709 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:06:26,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:06:26,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:06:26,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:06:26,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:06:26,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:06:26,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:06:26,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:06:26,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:06:26,711 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:06:26,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:06:26,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:06:26,712 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:06:26,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:06:26,712 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:06:26,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:06:26,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:06:26,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:06:26,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:06:26,714 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 22:06:27,201 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:06:27,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:06:27,226 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:06:27,229 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:06:27,229 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:06:27,231 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 22:06:27,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22ebde3a7/44b86ad0e6094f04ac287650c81d4ef9/FLAG011dd0d09 [2020-09-04 22:06:27,884 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:06:27,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-04 22:06:27,895 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22ebde3a7/44b86ad0e6094f04ac287650c81d4ef9/FLAG011dd0d09 [2020-09-04 22:06:28,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22ebde3a7/44b86ad0e6094f04ac287650c81d4ef9 [2020-09-04 22:06:28,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:06:28,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:06:28,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:28,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:06:28,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:06:28,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9fea37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28, skipping insertion in model container [2020-09-04 22:06:28,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:06:28,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:06:28,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:28,598 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:06:28,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:06:28,647 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:06:28,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28 WrapperNode [2020-09-04 22:06:28,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:06:28,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:06:28,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:06:28,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:06:28,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... [2020-09-04 22:06:28,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:06:28,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:06:28,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:06:28,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:06:28,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 22:06:28,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:06:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:06:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-04 22:06:28,883 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:06:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:06:28,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:06:28,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:06:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:06:28,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:06:29,279 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:06:29,280 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 22:06:29,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:29 BoogieIcfgContainer [2020-09-04 22:06:29,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:06:29,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:06:29,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:06:29,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:06:29,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:06:28" (1/3) ... [2020-09-04 22:06:29,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d8ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:29, skipping insertion in model container [2020-09-04 22:06:29,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:06:28" (2/3) ... [2020-09-04 22:06:29,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23d8ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:06:29, skipping insertion in model container [2020-09-04 22:06:29,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:06:29" (3/3) ... [2020-09-04 22:06:29,299 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-04 22:06:29,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:06:29,324 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:06:29,350 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:06:29,381 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:06:29,381 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:06:29,381 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:06:29,381 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:06:29,382 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:06:29,382 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:06:29,382 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:06:29,382 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:06:29,403 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-04 22:06:29,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 22:06:29,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:29,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:29,421 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:29,428 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-04 22:06:29,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:29,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580781905] [2020-09-04 22:06:29,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:29,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:29,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:29,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 22:06:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:29,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:29,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580781905] [2020-09-04 22:06:29,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:29,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:06:29,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182917750] [2020-09-04 22:06:29,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:06:29,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:06:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:06:29,753 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-04 22:06:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:29,976 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-04 22:06:29,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:06:29,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-04 22:06:29,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:29,991 INFO L225 Difference]: With dead ends: 102 [2020-09-04 22:06:29,991 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 22:06:29,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:06:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 22:06:30,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-04 22:06:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-04 22:06:30,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-04 22:06:30,059 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-04 22:06:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:30,059 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-04 22:06:30,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:06:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-04 22:06:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-04 22:06:30,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:30,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:30,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:06:30,063 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-04 22:06:30,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901630178] [2020-09-04 22:06:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-04 22:06:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:30,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901630178] [2020-09-04 22:06:30,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:06:30,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 22:06:30,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780795713] [2020-09-04 22:06:30,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 22:06:30,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:30,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 22:06:30,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:30,215 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-04 22:06:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:30,437 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-04 22:06:30,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 22:06:30,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-04 22:06:30,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:30,440 INFO L225 Difference]: With dead ends: 92 [2020-09-04 22:06:30,440 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 22:06:30,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 22:06:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 22:06:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-04 22:06:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-04 22:06:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-04 22:06:30,469 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-04 22:06:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:30,469 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-04 22:06:30,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 22:06:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-04 22:06:30,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-04 22:06:30,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:30,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:30,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:06:30,475 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:30,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-04 22:06:30,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:30,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818847938] [2020-09-04 22:06:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:30,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 22:06:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:30,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818847938] [2020-09-04 22:06:30,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:30,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 22:06:30,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348182416] [2020-09-04 22:06:30,607 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 22:06:30,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:30,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 22:06:30,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 22:06:30,609 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-04 22:06:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:30,785 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-04 22:06:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 22:06:30,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-04 22:06:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:30,788 INFO L225 Difference]: With dead ends: 102 [2020-09-04 22:06:30,788 INFO L226 Difference]: Without dead ends: 72 [2020-09-04 22:06:30,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:06:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-04 22:06:30,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-04 22:06:30,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 22:06:30,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-04 22:06:30,800 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-04 22:06:30,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:30,800 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-04 22:06:30,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 22:06:30,800 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-04 22:06:30,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 22:06:30,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:30,803 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:30,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:06:30,803 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:30,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:30,804 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-04 22:06:30,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:30,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91904682] [2020-09-04 22:06:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 22:06:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:30,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91904682] [2020-09-04 22:06:30,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:30,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 22:06:30,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119221342] [2020-09-04 22:06:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:06:30,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:30,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:06:30,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:06:30,980 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-04 22:06:31,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:31,174 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-04 22:06:31,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 22:06:31,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-04 22:06:31,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:31,177 INFO L225 Difference]: With dead ends: 112 [2020-09-04 22:06:31,177 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 22:06:31,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:06:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 22:06:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-04 22:06:31,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 22:06:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-04 22:06:31,189 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-04 22:06:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:31,190 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-04 22:06:31,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:06:31,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-04 22:06:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 22:06:31,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:31,192 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:31,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:06:31,192 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:31,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:31,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-04 22:06:31,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:31,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428164488] [2020-09-04 22:06:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 22:06:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:31,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428164488] [2020-09-04 22:06:31,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:31,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 22:06:31,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534167116] [2020-09-04 22:06:31,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 22:06:31,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:31,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 22:06:31,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 22:06:31,373 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-04 22:06:31,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:31,614 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-04 22:06:31,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 22:06:31,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-04 22:06:31,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:31,616 INFO L225 Difference]: With dead ends: 122 [2020-09-04 22:06:31,616 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 22:06:31,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:06:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 22:06:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-04 22:06:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 22:06:31,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-04 22:06:31,629 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-04 22:06:31,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:31,630 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-04 22:06:31,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 22:06:31,630 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-04 22:06:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 22:06:31,632 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:31,632 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:31,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 22:06:31,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-04 22:06:31,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:31,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983503921] [2020-09-04 22:06:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:31,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-04 22:06:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:31,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983503921] [2020-09-04 22:06:31,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:31,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-04 22:06:31,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665836446] [2020-09-04 22:06:31,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 22:06:31,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:31,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 22:06:31,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 22:06:31,817 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-04 22:06:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:32,113 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-04 22:06:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 22:06:32,114 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-04 22:06:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:32,115 INFO L225 Difference]: With dead ends: 132 [2020-09-04 22:06:32,115 INFO L226 Difference]: Without dead ends: 102 [2020-09-04 22:06:32,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:06:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-04 22:06:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-04 22:06:32,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 22:06:32,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-04 22:06:32,146 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-04 22:06:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:32,147 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-04 22:06:32,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 22:06:32,147 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-04 22:06:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 22:06:32,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:32,152 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:32,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 22:06:32,156 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:32,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:32,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-04 22:06:32,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:32,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456993608] [2020-09-04 22:06:32,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:32,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 22:06:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:32,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456993608] [2020-09-04 22:06:32,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:32,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 22:06:32,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436896133] [2020-09-04 22:06:32,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 22:06:32,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:32,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 22:06:32,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 22:06:32,493 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-04 22:06:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:32,868 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-04 22:06:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 22:06:32,869 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-04 22:06:32,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:32,870 INFO L225 Difference]: With dead ends: 142 [2020-09-04 22:06:32,871 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 22:06:32,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 22:06:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 22:06:32,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-04 22:06:32,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-04 22:06:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-04 22:06:32,885 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-04 22:06:32,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:32,885 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-04 22:06:32,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 22:06:32,886 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-04 22:06:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-04 22:06:32,887 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:32,888 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:32,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 22:06:32,888 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-04 22:06:32,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:32,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171642249] [2020-09-04 22:06:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:32,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-04 22:06:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:33,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171642249] [2020-09-04 22:06:33,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:33,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-04 22:06:33,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494861071] [2020-09-04 22:06:33,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 22:06:33,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:33,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 22:06:33,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:06:33,181 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-04 22:06:33,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:33,614 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-04 22:06:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 22:06:33,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-04 22:06:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:33,617 INFO L225 Difference]: With dead ends: 152 [2020-09-04 22:06:33,617 INFO L226 Difference]: Without dead ends: 122 [2020-09-04 22:06:33,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 22:06:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-04 22:06:33,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-04 22:06:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 22:06:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-04 22:06:33,631 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-04 22:06:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:33,632 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-04 22:06:33,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 22:06:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-04 22:06:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 22:06:33,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:33,634 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:33,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 22:06:33,635 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:33,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:33,635 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-04 22:06:33,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:33,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710695994] [2020-09-04 22:06:33,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:33,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-04 22:06:33,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:33,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710695994] [2020-09-04 22:06:33,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:33,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 22:06:33,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992181733] [2020-09-04 22:06:33,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 22:06:33,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:33,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 22:06:33,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 22:06:33,936 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-04 22:06:34,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:34,419 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-04 22:06:34,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 22:06:34,420 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-04 22:06:34,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:34,421 INFO L225 Difference]: With dead ends: 162 [2020-09-04 22:06:34,422 INFO L226 Difference]: Without dead ends: 132 [2020-09-04 22:06:34,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:06:34,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-04 22:06:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-04 22:06:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-04 22:06:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-04 22:06:34,435 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-04 22:06:34,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:34,435 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-04 22:06:34,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 22:06:34,436 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-04 22:06:34,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-04 22:06:34,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:34,438 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:34,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 22:06:34,438 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:34,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-04 22:06:34,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:34,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638647747] [2020-09-04 22:06:34,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-04 22:06:34,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:34,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638647747] [2020-09-04 22:06:34,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:34,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 22:06:34,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970015298] [2020-09-04 22:06:34,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 22:06:34,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:34,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 22:06:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 22:06:34,754 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-04 22:06:35,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:35,307 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-04 22:06:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 22:06:35,308 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-04 22:06:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:35,310 INFO L225 Difference]: With dead ends: 172 [2020-09-04 22:06:35,310 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 22:06:35,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 22:06:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 22:06:35,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-04 22:06:35,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 22:06:35,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-04 22:06:35,333 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-04 22:06:35,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:35,335 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-04 22:06:35,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 22:06:35,335 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-04 22:06:35,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-04 22:06:35,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:35,337 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:35,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 22:06:35,338 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:35,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:35,339 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-04 22:06:35,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:35,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197093886] [2020-09-04 22:06:35,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-04 22:06:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:35,729 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:35,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197093886] [2020-09-04 22:06:35,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:35,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 22:06:35,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97284541] [2020-09-04 22:06:35,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 22:06:35,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:35,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 22:06:35,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 22:06:35,732 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-04 22:06:36,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:36,336 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-04 22:06:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 22:06:36,337 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-04 22:06:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:36,339 INFO L225 Difference]: With dead ends: 182 [2020-09-04 22:06:36,339 INFO L226 Difference]: Without dead ends: 152 [2020-09-04 22:06:36,340 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 22:06:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-04 22:06:36,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-04 22:06:36,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 22:06:36,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-04 22:06:36,353 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-04 22:06:36,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:36,354 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-04 22:06:36,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 22:06:36,354 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-04 22:06:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 22:06:36,356 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:36,356 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:36,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 22:06:36,357 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:36,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-04 22:06:36,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:36,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850072583] [2020-09-04 22:06:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-04 22:06:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:36,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850072583] [2020-09-04 22:06:36,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:36,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 22:06:36,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154753770] [2020-09-04 22:06:36,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 22:06:36,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:36,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 22:06:36,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-04 22:06:36,775 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-04 22:06:37,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:37,401 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-04 22:06:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 22:06:37,402 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-04 22:06:37,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:37,404 INFO L225 Difference]: With dead ends: 192 [2020-09-04 22:06:37,404 INFO L226 Difference]: Without dead ends: 162 [2020-09-04 22:06:37,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 22:06:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-04 22:06:37,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-04 22:06:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 22:06:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-04 22:06:37,416 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-04 22:06:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:37,417 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-04 22:06:37,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 22:06:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-04 22:06:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-04 22:06:37,419 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:37,419 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:37,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 22:06:37,420 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:37,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:37,420 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-04 22:06:37,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:37,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085041217] [2020-09-04 22:06:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:37,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:37,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-04 22:06:37,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:37,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085041217] [2020-09-04 22:06:37,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:37,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 22:06:37,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443109495] [2020-09-04 22:06:37,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 22:06:37,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 22:06:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 22:06:37,943 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-04 22:06:38,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:38,834 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-04 22:06:38,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 22:06:38,835 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-04 22:06:38,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:38,836 INFO L225 Difference]: With dead ends: 202 [2020-09-04 22:06:38,837 INFO L226 Difference]: Without dead ends: 172 [2020-09-04 22:06:38,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 22:06:38,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-04 22:06:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-04 22:06:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-04 22:06:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-04 22:06:38,851 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-04 22:06:38,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:38,851 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-04 22:06:38,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 22:06:38,852 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-04 22:06:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-04 22:06:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:38,854 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:38,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 22:06:38,855 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:38,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-04 22:06:38,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:38,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048651832] [2020-09-04 22:06:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:39,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:39,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-04 22:06:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:39,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048651832] [2020-09-04 22:06:39,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:39,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 22:06:39,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157263594] [2020-09-04 22:06:39,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 22:06:39,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 22:06:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-04 22:06:39,360 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-04 22:06:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:40,292 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-04 22:06:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 22:06:40,293 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-04 22:06:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:40,294 INFO L225 Difference]: With dead ends: 212 [2020-09-04 22:06:40,295 INFO L226 Difference]: Without dead ends: 182 [2020-09-04 22:06:40,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 22:06:40,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-04 22:06:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-04 22:06:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-04 22:06:40,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-04 22:06:40,309 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-04 22:06:40,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:40,310 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-04 22:06:40,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 22:06:40,310 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-04 22:06:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 22:06:40,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:40,312 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:40,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 22:06:40,313 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-04 22:06:40,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:40,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937749376] [2020-09-04 22:06:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:40,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:40,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-04 22:06:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:40,971 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:40,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937749376] [2020-09-04 22:06:40,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:40,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 22:06:40,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911963728] [2020-09-04 22:06:40,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 22:06:40,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:40,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 22:06:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 22:06:40,974 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-04 22:06:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:41,941 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-04 22:06:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 22:06:41,942 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-04 22:06:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:41,944 INFO L225 Difference]: With dead ends: 222 [2020-09-04 22:06:41,944 INFO L226 Difference]: Without dead ends: 192 [2020-09-04 22:06:41,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 22:06:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-04 22:06:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-04 22:06:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-04 22:06:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-04 22:06:41,959 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-04 22:06:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:41,960 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-04 22:06:41,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 22:06:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-04 22:06:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-04 22:06:41,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:41,962 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:41,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 22:06:41,963 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-04 22:06:41,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:41,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769537960] [2020-09-04 22:06:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:42,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:42,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-04 22:06:42,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:42,585 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:42,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769537960] [2020-09-04 22:06:42,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:42,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 22:06:42,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582645816] [2020-09-04 22:06:42,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 22:06:42,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:42,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 22:06:42,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 22:06:42,591 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-04 22:06:43,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:43,806 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-04 22:06:43,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 22:06:43,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-04 22:06:43,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:43,809 INFO L225 Difference]: With dead ends: 232 [2020-09-04 22:06:43,809 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 22:06:43,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 22:06:43,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 22:06:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-04 22:06:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-04 22:06:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-04 22:06:43,824 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-04 22:06:43,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:43,824 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-04 22:06:43,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 22:06:43,825 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-04 22:06:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-04 22:06:43,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:43,827 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:43,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 22:06:43,828 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:43,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:43,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-04 22:06:43,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:43,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420575928] [2020-09-04 22:06:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:44,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-04 22:06:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:44,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:44,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420575928] [2020-09-04 22:06:44,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:44,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 22:06:44,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766351636] [2020-09-04 22:06:44,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 22:06:44,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:44,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 22:06:44,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 22:06:44,523 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-04 22:06:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:45,678 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-04 22:06:45,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 22:06:45,679 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-04 22:06:45,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:45,681 INFO L225 Difference]: With dead ends: 242 [2020-09-04 22:06:45,681 INFO L226 Difference]: Without dead ends: 212 [2020-09-04 22:06:45,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 22:06:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-04 22:06:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-04 22:06:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 22:06:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-04 22:06:45,692 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-04 22:06:45,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:45,693 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-04 22:06:45,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 22:06:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-04 22:06:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-04 22:06:45,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:45,696 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:45,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 22:06:45,696 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:45,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:45,697 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-04 22:06:45,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:45,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73573070] [2020-09-04 22:06:45,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:46,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:46,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-04 22:06:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:46,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73573070] [2020-09-04 22:06:46,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:46,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 22:06:46,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022665574] [2020-09-04 22:06:46,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 22:06:46,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:46,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 22:06:46,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 22:06:46,529 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-04 22:06:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:47,893 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-04 22:06:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-04 22:06:47,894 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-04 22:06:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:47,897 INFO L225 Difference]: With dead ends: 252 [2020-09-04 22:06:47,898 INFO L226 Difference]: Without dead ends: 222 [2020-09-04 22:06:47,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 22:06:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-04 22:06:47,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-04 22:06:47,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-04 22:06:47,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-04 22:06:47,908 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-04 22:06:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:47,909 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-04 22:06:47,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 22:06:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-04 22:06:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-04 22:06:47,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:47,911 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:47,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 22:06:47,911 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-04 22:06:47,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:47,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547778751] [2020-09-04 22:06:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:48,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:48,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-04 22:06:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:48,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547778751] [2020-09-04 22:06:48,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:48,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 22:06:48,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126143869] [2020-09-04 22:06:48,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 22:06:48,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:48,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 22:06:48,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 22:06:48,815 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-04 22:06:50,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:50,285 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-04 22:06:50,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 22:06:50,285 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-04 22:06:50,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:50,288 INFO L225 Difference]: With dead ends: 262 [2020-09-04 22:06:50,288 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 22:06:50,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 22:06:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 22:06:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-04 22:06:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-04 22:06:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-04 22:06:50,300 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-04 22:06:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:50,301 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-04 22:06:50,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 22:06:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-04 22:06:50,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-04 22:06:50,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:50,303 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:50,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 22:06:50,303 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:50,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:50,304 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-04 22:06:50,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:50,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742173061] [2020-09-04 22:06:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:50,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:51,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2020-09-04 22:06:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 0 proven. 1548 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:51,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742173061] [2020-09-04 22:06:51,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:51,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 22:06:51,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709093445] [2020-09-04 22:06:51,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 22:06:51,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:51,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 22:06:51,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 22:06:51,281 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand 40 states. [2020-09-04 22:06:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:52,971 INFO L93 Difference]: Finished difference Result 272 states and 274 transitions. [2020-09-04 22:06:52,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-04 22:06:52,971 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 219 [2020-09-04 22:06:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:52,975 INFO L225 Difference]: With dead ends: 272 [2020-09-04 22:06:52,976 INFO L226 Difference]: Without dead ends: 242 [2020-09-04 22:06:52,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 22:06:52,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-04 22:06:52,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 234. [2020-09-04 22:06:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 22:06:52,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-09-04 22:06:52,988 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 219 [2020-09-04 22:06:52,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:52,988 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-09-04 22:06:52,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 22:06:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-09-04 22:06:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 22:06:52,990 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:52,990 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:52,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 22:06:52,991 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash 669563575, now seen corresponding path program 19 times [2020-09-04 22:06:52,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:52,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810692684] [2020-09-04 22:06:52,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:06:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 217 [2020-09-04 22:06:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:06:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1729 backedges. 0 proven. 1729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:06:54,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810692684] [2020-09-04 22:06:54,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:06:54,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 22:06:54,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014336908] [2020-09-04 22:06:54,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 22:06:54,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:06:54,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 22:06:54,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 22:06:54,026 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 42 states. [2020-09-04 22:06:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:06:55,581 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2020-09-04 22:06:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 22:06:55,582 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 229 [2020-09-04 22:06:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:06:55,584 INFO L225 Difference]: With dead ends: 274 [2020-09-04 22:06:55,584 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 22:06:55,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 22:06:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 22:06:55,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-09-04 22:06:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-09-04 22:06:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2020-09-04 22:06:55,596 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 229 [2020-09-04 22:06:55,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:06:55,597 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2020-09-04 22:06:55,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 22:06:55,598 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2020-09-04 22:06:55,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-09-04 22:06:55,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:06:55,601 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:06:55,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 22:06:55,601 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:06:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:06:55,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1024771811, now seen corresponding path program 20 times [2020-09-04 22:06:55,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:06:55,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940253970] [2020-09-04 22:06:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:06:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:55,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:06:56,005 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:06:56,105 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:06:56,105 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:06:56,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 22:06:56,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:06:56 BoogieIcfgContainer [2020-09-04 22:06:56,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:06:56,246 INFO L168 Benchmark]: Toolchain (without parser) took 28021.58 ms. Allocated memory was 145.8 MB in the beginning and 466.6 MB in the end (delta: 320.9 MB). Free memory was 102.8 MB in the beginning and 423.5 MB in the end (delta: -320.6 MB). Peak memory consumption was 315.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:56,246 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:06:56,249 INFO L168 Benchmark]: CACSL2BoogieTranslator took 428.93 ms. Allocated memory is still 145.8 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:56,250 INFO L168 Benchmark]: Boogie Preprocessor took 142.53 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 180.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:56,251 INFO L168 Benchmark]: RCFGBuilder took 496.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 162.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:56,252 INFO L168 Benchmark]: TraceAbstraction took 26947.51 ms. Allocated memory was 203.4 MB in the beginning and 466.6 MB in the end (delta: 263.2 MB). Free memory was 161.3 MB in the beginning and 423.5 MB in the end (delta: -262.1 MB). Peak memory consumption was 315.9 MB. Max. memory is 7.1 GB. [2020-09-04 22:06:56,262 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 428.93 ms. Allocated memory is still 145.8 MB. Free memory was 102.6 MB in the beginning and 92.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.53 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.2 MB in the beginning and 180.7 MB in the end (delta: -88.4 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 496.34 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 162.0 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 26947.51 ms. Allocated memory was 203.4 MB in the beginning and 466.6 MB in the end (delta: 263.2 MB). Free memory was 161.3 MB in the beginning and 423.5 MB in the end (delta: -262.1 MB). Peak memory consumption was 315.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; VAL [ad1={2:0}] [L16] int i, j, *pa; VAL [ad1={2:0}] [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=0] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, ad1={2:0}, j=0] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-2, ad1={2:0}, j=0] [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=1] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=3, ad1={2:0}, j=1] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-3, ad1={2:0}, j=1] [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=2] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-4, ad1={2:0}, j=2] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=5, ad1={2:0}, j=2] [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=3] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-5, ad1={2:0}, j=3] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=6, ad1={2:0}, j=3] [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=4] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-6, ad1={2:0}, j=4] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=7, ad1={2:0}, j=4] [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=5] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-7, ad1={2:0}, j=5] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-8, ad1={2:0}, j=5] [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=6] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=9, ad1={2:0}, j=6] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-9, ad1={2:0}, j=6] [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=7] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=26, ad1={2:0}, j=7] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=11, ad1={2:0}, j=7] [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=8] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-11, ad1={2:0}, j=8] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-12, ad1={2:0}, j=8] [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=9] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=13, ad1={2:0}, j=9] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-13, ad1={2:0}, j=9] [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=10] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=14, ad1={2:0}, j=10] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-14, ad1={2:0}, j=10] [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=11] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=15, ad1={2:0}, j=11] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-15, ad1={2:0}, j=11] [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=12] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-16, ad1={2:0}, j=12] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=17, ad1={2:0}, j=12] [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=13] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-17, ad1={2:0}, j=13] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=18, ad1={2:0}, j=13] [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=14] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-18, ad1={2:0}, j=14] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=19, ad1={2:0}, j=14] [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=15] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-19, ad1={2:0}, j=15] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-20, ad1={2:0}, j=15] [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=16] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=21, ad1={2:0}, j=16] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-21, ad1={2:0}, j=16] [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=17] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=22, ad1={2:0}, j=17] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-22, ad1={2:0}, j=17] [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=18] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=23, ad1={2:0}, j=18] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-23, ad1={2:0}, j=18] [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 VAL [ad1={2:0}, j=19] [L18] ad1[j].a = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-24, ad1={2:0}, j=19] [L19] ad1[j].b = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=25, ad1={2:0}, j=19] [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, ad1={2:0}, i=0, j=20] [L22] COND TRUE i >= 0 && i < 10 VAL [ad1={2:0}, i=0, j=20] [L23] ad2 = ad1 VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L24] ad1[i].a = i VAL [ad1={2:0}, ad2={2:0}, i=0, j=20] [L25] pa = &ad1[i].a VAL [ad1={2:0}, ad2={2:0}, i=0, j=20, pa={2:0}] [L26] EXPR ad2[i].a VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=0, j=20, pa={2:0}] [L26] i = ad2[i].a + 10 VAL [ad1={2:0}, ad2={2:0}, ad2[i].a=0, i=10, j=20, pa={2:0}] [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a VAL [\old(b)=10, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L10] return ad1[b].a == b; VAL [\old(b)=10, \result=0, ad1={2:0}, ad1={2:0}, ad1[b].a=14, b=10] [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26.7s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 15.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1023 SDtfs, 1875 SDslu, 11317 SDs, 0 SdLazy, 5156 SolverSat, 320 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 906 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 801 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7391 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 152 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 8.3s InterpolantComputationTime, 2956 NumberOfCodeBlocks, 2956 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 2696 ConstructedInterpolants, 0 QuantifiedInterpolants, 1089560 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/11590 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...