/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:23,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:23,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:23,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:23,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:23,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:23,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:23,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:23,773 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:23,776 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:23,777 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:23,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:23,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:23,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:23,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:23,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:23,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:23,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:23,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:23,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:23,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:23,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:23,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:23,807 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:23,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:23,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:23,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:23,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:23,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:23,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:23,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:23,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:23,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:23,836 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:23,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:23,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:23,839 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:23,839 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:23,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:23,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:23,841 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:23,842 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:31:23,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:23,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:23,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:23,870 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:23,871 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:23,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:23,871 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:23,871 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:23,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:23,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:23,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:23,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:23,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:23,872 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:23,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:23,873 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:23,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:23,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:23,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:23,874 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:23,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:23,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:23,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:23,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:23,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:23,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:23,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:23,875 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:23,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:23,876 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:24,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:24,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:24,453 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:24,455 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:24,456 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:24,457 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-21 11:31:24,551 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ac618c20/7eab097b88e646c3984c0e69dd657536/FLAG90f32a47f [2020-09-21 11:31:25,074 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:25,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-21 11:31:25,083 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ac618c20/7eab097b88e646c3984c0e69dd657536/FLAG90f32a47f [2020-09-21 11:31:25,421 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1ac618c20/7eab097b88e646c3984c0e69dd657536 [2020-09-21 11:31:25,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:25,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:25,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:25,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:25,444 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:25,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,450 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25, skipping insertion in model container [2020-09-21 11:31:25,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:25,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:25,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:25,739 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:25,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:25,783 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:25,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25 WrapperNode [2020-09-21 11:31:25,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:25,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:25,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:25,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:25,886 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (1/1) ... [2020-09-21 11:31:25,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:25,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:25,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:25,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:25,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (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 [2020-09-21 11:31:25,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:25,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:25,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:25,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:25,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:31:25,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:31:25,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:31:25,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:31:25,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:25,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:26,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:26,217 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:31:26,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:26 BoogieIcfgContainer [2020-09-21 11:31:26,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:26,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:26,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:26,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:26,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:25" (1/3) ... [2020-09-21 11:31:26,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1520b166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:26, skipping insertion in model container [2020-09-21 11:31:26,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:25" (2/3) ... [2020-09-21 11:31:26,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1520b166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:26, skipping insertion in model container [2020-09-21 11:31:26,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:26" (3/3) ... [2020-09-21 11:31:26,236 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-21 11:31:26,248 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:26,258 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:26,285 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:26,345 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:26,346 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:26,346 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:26,346 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:26,346 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:26,346 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:26,346 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:26,347 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-09-21 11:31:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:31:26,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,381 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:26,382 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,389 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-09-21 11:31:26,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72151083] [2020-09-21 11:31:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,535 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,536 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,536 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,536 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:31:26,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:26,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:26,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,615 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,616 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,616 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,616 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-21 11:31:26,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72151083] [2020-09-21 11:31:26,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:26,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:31:26,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493926321] [2020-09-21 11:31:26,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:31:26,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:31:26,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:26,676 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-09-21 11:31:26,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:26,762 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-09-21 11:31:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:31:26,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-21 11:31:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:26,775 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:31:26,775 INFO L226 Difference]: Without dead ends: 14 [2020-09-21 11:31:26,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:31:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-21 11:31:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-21 11:31:26,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-21 11:31:26,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-21 11:31:26,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-21 11:31:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:26,827 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-21 11:31:26,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:31:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-21 11:31:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:31:26,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:26,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:26,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:26,829 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:26,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:26,830 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-09-21 11:31:26,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:26,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881362384] [2020-09-21 11:31:26,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,871 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,871 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,871 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,872 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:31:26,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:31:26,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:31:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:26,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:31:26,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:26,940 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:26,940 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:26,940 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:26,941 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:26,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:26,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:26,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:26,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:26,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:26,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:26,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:26,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881362384] [2020-09-21 11:31:26,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:26,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:31:26,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773329816] [2020-09-21 11:31:26,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:31:26,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:31:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:26,955 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-09-21 11:31:27,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,002 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-09-21 11:31:27,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:31:27,003 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-21 11:31:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,004 INFO L225 Difference]: With dead ends: 22 [2020-09-21 11:31:27,005 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:31:27,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:31:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:31:27,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-21 11:31:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-21 11:31:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-21 11:31:27,012 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-09-21 11:31:27,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,013 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-21 11:31:27,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:31:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-21 11:31:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-21 11:31:27,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:27,015 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-09-21 11:31:27,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558043240] [2020-09-21 11:31:27,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,046 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,047 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,047 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,047 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-21 11:31:27,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:31:27,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:31:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:27,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:27,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,094 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,094 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,094 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,095 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558043240] [2020-09-21 11:31:27,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:27,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735325780] [2020-09-21 11:31:27,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:27,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:27,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:27,105 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-09-21 11:31:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,152 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-09-21 11:31:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:27,153 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-21 11:31:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,154 INFO L225 Difference]: With dead ends: 24 [2020-09-21 11:31:27,154 INFO L226 Difference]: Without dead ends: 18 [2020-09-21 11:31:27,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:27,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-21 11:31:27,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-09-21 11:31:27,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-21 11:31:27,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-21 11:31:27,161 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-09-21 11:31:27,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,162 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-21 11:31:27,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:27,162 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-21 11:31:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:31:27,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,163 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:27,164 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1288728289, now seen corresponding path program 2 times [2020-09-21 11:31:27,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029405768] [2020-09-21 11:31:27,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,216 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,217 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-21 11:31:27,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:27,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:31:27,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:27,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,323 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,324 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,324 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,324 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-21 11:31:27,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:27,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029405768] [2020-09-21 11:31:27,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:31:27,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097531812] [2020-09-21 11:31:27,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:31:27,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:31:27,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,350 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-21 11:31:27,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,414 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-09-21 11:31:27,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:27,414 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-21 11:31:27,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,415 INFO L225 Difference]: With dead ends: 26 [2020-09-21 11:31:27,416 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:31:27,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:27,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:31:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-09-21 11:31:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-21 11:31:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-21 11:31:27,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-09-21 11:31:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,423 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-21 11:31:27,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:31:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-21 11:31:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:31:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,425 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:27,425 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,426 INFO L82 PathProgramCache]: Analyzing trace with hash 676582787, now seen corresponding path program 3 times [2020-09-21 11:31:27,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96213631] [2020-09-21 11:31:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,487 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,488 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,489 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,489 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:31:27,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:31:27,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:31:27,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:31:27,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,582 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,582 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,582 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,583 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96213631] [2020-09-21 11:31:27,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:27,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292541713] [2020-09-21 11:31:27,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:27,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:27,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,592 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-09-21 11:31:27,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,659 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-09-21 11:31:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:31:27,660 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-21 11:31:27,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,661 INFO L225 Difference]: With dead ends: 28 [2020-09-21 11:31:27,661 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:31:27,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:31:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 11:31:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:31:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-21 11:31:27,667 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-09-21 11:31:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,668 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-21 11:31:27,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-21 11:31:27,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:31:27,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:31:27,670 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 4 times [2020-09-21 11:31:27,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580263911] [2020-09-21 11:31:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,713 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,714 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,714 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,714 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:31:27,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:31:27,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:27,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:31:27,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,784 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,785 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,785 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,785 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580263911] [2020-09-21 11:31:27,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:31:27,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278483736] [2020-09-21 11:31:27,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:31:27,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:31:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:27,794 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-09-21 11:31:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:27,857 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-09-21 11:31:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:27,858 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-21 11:31:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:27,859 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:31:27,859 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:31:27,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:31:27,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:31:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-21 11:31:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:31:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-21 11:31:27,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-09-21 11:31:27,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:27,866 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-21 11:31:27,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:31:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-21 11:31:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:31:27,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:27,867 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:27,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:31:27,868 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 954425671, now seen corresponding path program 5 times [2020-09-21 11:31:27,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:27,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535586643] [2020-09-21 11:31:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,907 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,908 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,908 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,908 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:31:27,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:31:27,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:31:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:27,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:31:27,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:27,985 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:27,985 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:27,985 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:27,986 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:27,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:27,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:27,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:27,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:27,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:27,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:27,991 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:27,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535586643] [2020-09-21 11:31:27,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:27,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:31:27,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902016350] [2020-09-21 11:31:27,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:31:27,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:27,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:31:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:27,994 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-09-21 11:31:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,057 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-09-21 11:31:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:31:28,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-09-21 11:31:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,059 INFO L225 Difference]: With dead ends: 32 [2020-09-21 11:31:28,059 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:31:28,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:31:28,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:31:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-21 11:31:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:31:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-09-21 11:31:28,066 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-09-21 11:31:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,066 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-09-21 11:31:28,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:31:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-09-21 11:31:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:31:28,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,067 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:31:28,068 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1534314089, now seen corresponding path program 6 times [2020-09-21 11:31:28,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018937099] [2020-09-21 11:31:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,107 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,108 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,108 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,108 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:31:28,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-21 11:31:28,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:31:28,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:28,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,192 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,192 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,193 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,193 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:28,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018937099] [2020-09-21 11:31:28,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:31:28,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378724137] [2020-09-21 11:31:28,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:31:28,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:31:28,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:28,201 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-09-21 11:31:28,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,269 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-09-21 11:31:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:31:28,270 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-09-21 11:31:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,271 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:31:28,271 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:31:28,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:28,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:31:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-21 11:31:28,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:31:28,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-21 11:31:28,277 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-09-21 11:31:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,278 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-21 11:31:28,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:31:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-21 11:31:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:31:28,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,279 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:31:28,280 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,280 INFO L82 PathProgramCache]: Analyzing trace with hash 461335307, now seen corresponding path program 7 times [2020-09-21 11:31:28,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358160227] [2020-09-21 11:31:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,324 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,324 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:31:28,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-09-21 11:31:28,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:31:28,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:31:28,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,430 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,431 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,431 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,431 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:28,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358160227] [2020-09-21 11:31:28,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:31:28,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879619294] [2020-09-21 11:31:28,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:31:28,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:31:28,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:28,440 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-09-21 11:31:28,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,521 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-21 11:31:28,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:31:28,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-09-21 11:31:28,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,522 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:31:28,523 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:31:28,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:31:28,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:31:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 11:31:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:31:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-09-21 11:31:28,538 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-09-21 11:31:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,538 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-09-21 11:31:28,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:31:28,538 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-09-21 11:31:28,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:31:28,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,539 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:31:28,540 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,540 INFO L82 PathProgramCache]: Analyzing trace with hash 120876845, now seen corresponding path program 8 times [2020-09-21 11:31:28,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650820554] [2020-09-21 11:31:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,584 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,585 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,585 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,585 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:31:28,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-09-21 11:31:28,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:31:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:31:28,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,696 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,697 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,697 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,698 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:28,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:28,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:28,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:28,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:28,705 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:28,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650820554] [2020-09-21 11:31:28,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:28,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:31:28,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729959062] [2020-09-21 11:31:28,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:31:28,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:28,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:31:28,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:28,708 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-09-21 11:31:28,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:28,806 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-09-21 11:31:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:31:28,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-09-21 11:31:28,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:28,808 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:31:28,808 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:31:28,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:31:28,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:31:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-21 11:31:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:31:28,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-09-21 11:31:28,819 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-09-21 11:31:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:28,819 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-09-21 11:31:28,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:31:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-09-21 11:31:28,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:31:28,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:28,823 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:28,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:31:28,824 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:28,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash -642190641, now seen corresponding path program 9 times [2020-09-21 11:31:28,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:28,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666859630] [2020-09-21 11:31:28,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:28,896 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:28,896 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:28,896 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:28,897 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:28,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:31:28,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:28,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-21 11:31:28,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:28,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:31:28,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:28,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:31:28,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,032 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,032 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,032 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,033 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:29,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666859630] [2020-09-21 11:31:29,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:31:29,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009545924] [2020-09-21 11:31:29,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:31:29,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:31:29,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:29,044 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-09-21 11:31:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,116 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-09-21 11:31:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:31:29,117 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-09-21 11:31:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,118 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:31:29,118 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:31:29,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:31:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:31:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 11:31:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:31:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-21 11:31:29,123 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-09-21 11:31:29,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,124 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-21 11:31:29,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:31:29,124 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-21 11:31:29,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:31:29,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,125 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:31:29,126 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 10 times [2020-09-21 11:31:29,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198994651] [2020-09-21 11:31:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,176 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,177 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,177 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,177 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:31:29,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,341 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,341 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,341 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,341 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:29,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198994651] [2020-09-21 11:31:29,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:31:29,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583504467] [2020-09-21 11:31:29,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:31:29,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:31:29,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:29,350 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-09-21 11:31:29,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,435 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-09-21 11:31:29,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:31:29,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-09-21 11:31:29,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,436 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:31:29,436 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:31:29,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:31:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:31:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-21 11:31:29,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:31:29,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-21 11:31:29,445 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-09-21 11:31:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,446 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-21 11:31:29,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:31:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-21 11:31:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:31:29,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,447 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:31:29,447 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1285617811, now seen corresponding path program 11 times [2020-09-21 11:31:29,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542074843] [2020-09-21 11:31:29,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,511 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,511 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,511 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:31:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:31:29,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,699 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:29,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:29,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:29,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:29,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542074843] [2020-09-21 11:31:29,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:29,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:31:29,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423359785] [2020-09-21 11:31:29,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:31:29,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:29,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:31:29,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:29,708 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-09-21 11:31:29,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:29,799 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-09-21 11:31:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:31:29,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-09-21 11:31:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:29,800 INFO L225 Difference]: With dead ends: 44 [2020-09-21 11:31:29,801 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:31:29,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:31:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:31:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-21 11:31:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:31:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-21 11:31:29,806 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-09-21 11:31:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:29,807 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-21 11:31:29,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:31:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-21 11:31:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:31:29,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:29,808 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:29,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:31:29,809 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1982380725, now seen corresponding path program 12 times [2020-09-21 11:31:29,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:29,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72787469] [2020-09-21 11:31:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:29,866 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:29,867 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:29,867 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:29,867 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:29,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:31:29,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:29,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:31:29,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:29,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:31:29,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:29,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:31:29,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,023 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,023 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,023 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,024 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72787469] [2020-09-21 11:31:30,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:31:30,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809260876] [2020-09-21 11:31:30,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:31:30,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:31:30,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:31:30,032 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-09-21 11:31:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,114 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-21 11:31:30,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:31:30,114 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-09-21 11:31:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,115 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:31:30,115 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:31:30,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:31:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:31:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 11:31:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:31:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-09-21 11:31:30,121 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-09-21 11:31:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,122 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-09-21 11:31:30,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:31:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-09-21 11:31:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:31:30,123 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,123 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:31:30,124 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1556642903, now seen corresponding path program 13 times [2020-09-21 11:31:30,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767875922] [2020-09-21 11:31:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,182 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,182 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,183 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,183 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:31:30,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-21 11:31:30,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:31:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:31:30,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,376 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,376 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,377 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,377 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767875922] [2020-09-21 11:31:30,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:31:30,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819581856] [2020-09-21 11:31:30,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:31:30,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:31:30,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:31:30,385 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-09-21 11:31:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,494 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-09-21 11:31:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:31:30,494 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-09-21 11:31:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,495 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:31:30,495 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:31:30,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:31:30,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:31:30,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 11:31:30,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:31:30,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-09-21 11:31:30,501 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-09-21 11:31:30,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,501 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-09-21 11:31:30,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:31:30,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-09-21 11:31:30,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:31:30,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,502 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:31:30,503 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,503 INFO L82 PathProgramCache]: Analyzing trace with hash 444489081, now seen corresponding path program 14 times [2020-09-21 11:31:30,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821486313] [2020-09-21 11:31:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,567 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,567 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,567 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,568 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:31:30,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:31:30,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:31:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:30,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:31:30,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:30,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,824 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,824 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,824 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,824 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:30,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:30,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821486313] [2020-09-21 11:31:30,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:30,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:31:30,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624503684] [2020-09-21 11:31:30,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:31:30,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:30,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:31:30,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:31:30,835 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-09-21 11:31:30,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:30,949 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-21 11:31:30,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:31:30,949 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-09-21 11:31:30,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:30,950 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:31:30,951 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:31:30,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:31:30,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:31:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-21 11:31:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:31:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-21 11:31:30,962 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-09-21 11:31:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:30,963 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-21 11:31:30,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:31:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-21 11:31:30,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:31:30,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,965 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:31:30,966 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1111522843, now seen corresponding path program 15 times [2020-09-21 11:31:30,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181911589] [2020-09-21 11:31:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,052 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,053 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,053 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,053 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:31,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:31:31,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,261 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,262 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,262 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,262 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:31,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:31,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:31,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181911589] [2020-09-21 11:31:31,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:31,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:31:31,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422471179] [2020-09-21 11:31:31,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:31:31,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:31,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:31:31,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:31:31,273 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-09-21 11:31:31,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,412 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-09-21 11:31:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:31:31,413 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-09-21 11:31:31,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,413 INFO L225 Difference]: With dead ends: 52 [2020-09-21 11:31:31,414 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:31:31,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:31:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:31:31,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-21 11:31:31,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:31:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-09-21 11:31:31,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-09-21 11:31:31,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,422 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-09-21 11:31:31,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:31:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-09-21 11:31:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:31:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:31,423 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:31,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:31:31,424 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2114126275, now seen corresponding path program 16 times [2020-09-21 11:31:31,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:31,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049024703] [2020-09-21 11:31:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,553 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,554 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,554 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,554 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:31:31,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-09-21 11:31:31,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:31:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:31,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:31:31,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:31,854 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:31,855 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:31,855 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:31,855 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:31,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:31,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:31,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:31,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:31,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:31,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:31,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049024703] [2020-09-21 11:31:31,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:31,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:31:31,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19762721] [2020-09-21 11:31:31,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:31:31,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:31,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:31:31,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:31:31,874 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-09-21 11:31:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,997 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-09-21 11:31:31,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:31:31,997 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-09-21 11:31:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,998 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:31:31,998 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:31:31,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:31:32,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:31:32,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-21 11:31:32,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:31:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-21 11:31:32,010 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-09-21 11:31:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:32,011 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-21 11:31:32,011 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:31:32,011 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-21 11:31:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:31:32,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:32,015 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:32,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:31:32,016 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:32,016 INFO L82 PathProgramCache]: Analyzing trace with hash -996540961, now seen corresponding path program 17 times [2020-09-21 11:31:32,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:32,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058325189] [2020-09-21 11:31:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:32,134 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:32,134 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:32,134 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:32,134 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:32,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:32,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:31:32,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:32,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:32,389 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:32,389 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:32,389 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:32,389 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:32,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:32,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:32,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:32,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:32,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:32,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:32,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:32,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058325189] [2020-09-21 11:31:32,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:32,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:31:32,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748524361] [2020-09-21 11:31:32,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:31:32,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:32,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:31:32,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:31:32,400 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-09-21 11:31:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:32,498 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-21 11:31:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:31:32,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-09-21 11:31:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:32,500 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:31:32,500 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 11:31:32,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:31:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 11:31:32,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-09-21 11:31:32,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:31:32,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-09-21 11:31:32,507 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-09-21 11:31:32,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:32,507 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-09-21 11:31:32,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:31:32,507 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-09-21 11:31:32,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:31:32,511 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:32,511 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:32,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:31:32,512 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:32,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:32,512 INFO L82 PathProgramCache]: Analyzing trace with hash -738878207, now seen corresponding path program 18 times [2020-09-21 11:31:32,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:32,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364974255] [2020-09-21 11:31:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:32,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:32,602 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:32,602 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:32,603 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:32,603 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:32,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:31:32,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:32,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 11:31:32,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:31:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:32,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:31:32,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:32,941 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:32,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:32,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:32,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:32,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:32,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:32,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364974255] [2020-09-21 11:31:32,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:32,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:31:32,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731754872] [2020-09-21 11:31:32,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:31:32,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:32,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:31:32,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:31:32,950 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-09-21 11:31:33,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:33,029 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-09-21 11:31:33,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:31:33,029 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-09-21 11:31:33,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:33,030 INFO L225 Difference]: With dead ends: 58 [2020-09-21 11:31:33,030 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:31:33,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:31:33,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:31:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 11:31:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 11:31:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-09-21 11:31:33,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-09-21 11:31:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:33,035 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-09-21 11:31:33,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:31:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-09-21 11:31:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 11:31:33,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:33,036 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:33,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:31:33,037 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 2061892515, now seen corresponding path program 19 times [2020-09-21 11:31:33,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:33,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954670426] [2020-09-21 11:31:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:33,123 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:33,123 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:33,123 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:33,123 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:33,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:33,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:31:33,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:33,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:33,428 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:33,428 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:33,428 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:33,428 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:33,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:33,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:33,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:33,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:33,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:33,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:33,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:33,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954670426] [2020-09-21 11:31:33,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:33,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:31:33,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516143216] [2020-09-21 11:31:33,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:31:33,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:33,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:31:33,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:31:33,437 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-09-21 11:31:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:33,602 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-21 11:31:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:31:33,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-09-21 11:31:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:33,603 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:31:33,604 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 11:31:33,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:31:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 11:31:33,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-21 11:31:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 11:31:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-21 11:31:33,616 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-09-21 11:31:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:33,616 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-21 11:31:33,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:31:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-21 11:31:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:31:33,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:33,617 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:33,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:31:33,618 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 658061765, now seen corresponding path program 20 times [2020-09-21 11:31:33,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:33,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432219630] [2020-09-21 11:31:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:33,737 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:33,737 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:33,737 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:33,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:33,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 11:31:33,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:33,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-21 11:31:33,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-21 11:31:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-21 11:31:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:34,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:34,147 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:34,147 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:34,147 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:34,147 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:34,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:34,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:34,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:34,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:34,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:34,154 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:34,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432219630] [2020-09-21 11:31:34,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:34,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-21 11:31:34,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566947813] [2020-09-21 11:31:34,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-21 11:31:34,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:34,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-21 11:31:34,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:31:34,156 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-09-21 11:31:34,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:34,245 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-09-21 11:31:34,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-21 11:31:34,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-09-21 11:31:34,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:34,248 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:31:34,248 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 11:31:34,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-09-21 11:31:34,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 11:31:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-21 11:31:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 11:31:34,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-09-21 11:31:34,252 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-09-21 11:31:34,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:34,253 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-09-21 11:31:34,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-21 11:31:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-09-21 11:31:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 11:31:34,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:34,254 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:34,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:31:34,254 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:34,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 196441959, now seen corresponding path program 21 times [2020-09-21 11:31:34,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:34,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530975595] [2020-09-21 11:31:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:34,350 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:34,351 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:34,351 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:34,351 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:34,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:34,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-21 11:31:34,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:34,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:34,781 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:34,781 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:34,781 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:34,782 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:34,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:34,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:34,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:34,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:34,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:34,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:34,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530975595] [2020-09-21 11:31:34,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:34,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-21 11:31:34,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933057883] [2020-09-21 11:31:34,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-21 11:31:34,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-21 11:31:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:31:34,791 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-09-21 11:31:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:34,914 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-09-21 11:31:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-21 11:31:34,914 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-09-21 11:31:34,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:34,915 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:31:34,915 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:31:34,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-09-21 11:31:34,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:31:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-21 11:31:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:31:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-21 11:31:34,920 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-09-21 11:31:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:34,920 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-21 11:31:34,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-21 11:31:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-21 11:31:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:31:34,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:34,921 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:34,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-21 11:31:34,921 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:34,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:34,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 22 times [2020-09-21 11:31:34,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:34,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663840392] [2020-09-21 11:31:34,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:35,024 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:35,024 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:35,024 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:35,025 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:35,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:31:35,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:35,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-21 11:31:35,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:35,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-21 11:31:35,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:35,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-21 11:31:35,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:35,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:35,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:35,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:35,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:35,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:35,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:35,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663840392] [2020-09-21 11:31:35,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:35,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-21 11:31:35,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089035094] [2020-09-21 11:31:35,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-21 11:31:35,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:35,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-21 11:31:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:31:35,492 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-09-21 11:31:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:35,641 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-21 11:31:35,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-21 11:31:35,641 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-09-21 11:31:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:35,642 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:31:35,642 INFO L226 Difference]: Without dead ends: 60 [2020-09-21 11:31:35,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-09-21 11:31:35,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-21 11:31:35,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-09-21 11:31:35,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 11:31:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-09-21 11:31:35,647 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-09-21 11:31:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:35,647 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-09-21 11:31:35,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-21 11:31:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-09-21 11:31:35,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 11:31:35,651 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:35,651 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:35,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-21 11:31:35,653 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1830383915, now seen corresponding path program 23 times [2020-09-21 11:31:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:35,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237788123] [2020-09-21 11:31:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:35,784 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:35,785 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:35,785 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:35,785 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:35,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-21 11:31:35,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-21 11:31:35,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:36,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:36,185 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:36,186 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:36,186 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:36,186 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:36,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:36,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:36,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:36,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:36,198 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:36,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237788123] [2020-09-21 11:31:36,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:36,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-21 11:31:36,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17164994] [2020-09-21 11:31:36,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-21 11:31:36,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:36,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-21 11:31:36,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:31:36,200 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-09-21 11:31:36,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:36,361 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-09-21 11:31:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-21 11:31:36,361 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-09-21 11:31:36,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:36,362 INFO L225 Difference]: With dead ends: 68 [2020-09-21 11:31:36,362 INFO L226 Difference]: Without dead ends: 62 [2020-09-21 11:31:36,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-09-21 11:31:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-21 11:31:36,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-09-21 11:31:36,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-21 11:31:36,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-09-21 11:31:36,367 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-09-21 11:31:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:36,367 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-09-21 11:31:36,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-21 11:31:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-09-21 11:31:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-21 11:31:36,368 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:36,368 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:36,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-21 11:31:36,369 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:36,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1516596557, now seen corresponding path program 24 times [2020-09-21 11:31:36,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:36,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016586982] [2020-09-21 11:31:36,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:36,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:36,514 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:36,514 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:36,514 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:36,514 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:36,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-21 11:31:36,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:36,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-09-21 11:31:36,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:36,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-21 11:31:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-21 11:31:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:36,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:36,958 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:36,958 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:36,958 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:36,959 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:36,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:36,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:36,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:36,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:36,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:36,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:36,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:36,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016586982] [2020-09-21 11:31:36,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:36,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-21 11:31:36,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895033808] [2020-09-21 11:31:36,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-21 11:31:36,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:36,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-21 11:31:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:31:36,968 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-09-21 11:31:37,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:37,164 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-09-21 11:31:37,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-21 11:31:37,164 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-09-21 11:31:37,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:37,165 INFO L225 Difference]: With dead ends: 70 [2020-09-21 11:31:37,165 INFO L226 Difference]: Without dead ends: 64 [2020-09-21 11:31:37,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-09-21 11:31:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-21 11:31:37,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-21 11:31:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-21 11:31:37,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-09-21 11:31:37,169 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-09-21 11:31:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:37,170 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-09-21 11:31:37,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-21 11:31:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-09-21 11:31:37,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-21 11:31:37,171 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:37,171 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:37,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-21 11:31:37,171 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:37,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:37,172 INFO L82 PathProgramCache]: Analyzing trace with hash 614656239, now seen corresponding path program 25 times [2020-09-21 11:31:37,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:37,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161403616] [2020-09-21 11:31:37,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:37,294 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:37,294 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:37,294 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:37,294 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:37,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-21 11:31:37,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:37,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-21 11:31:37,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:37,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-21 11:31:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:37,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-21 11:31:37,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:37,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:37,839 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:37,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:37,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:37,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:37,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:37,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:37,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161403616] [2020-09-21 11:31:37,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:37,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-21 11:31:37,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490399598] [2020-09-21 11:31:37,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-21 11:31:37,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:37,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-21 11:31:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:31:37,849 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-09-21 11:31:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:38,049 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-09-21 11:31:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-21 11:31:38,050 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-09-21 11:31:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:38,051 INFO L225 Difference]: With dead ends: 72 [2020-09-21 11:31:38,051 INFO L226 Difference]: Without dead ends: 66 [2020-09-21 11:31:38,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-09-21 11:31:38,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-21 11:31:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-21 11:31:38,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-21 11:31:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-09-21 11:31:38,056 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-09-21 11:31:38,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:38,056 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-09-21 11:31:38,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-21 11:31:38,057 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-09-21 11:31:38,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-21 11:31:38,057 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:38,058 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:38,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-21 11:31:38,058 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1433404433, now seen corresponding path program 26 times [2020-09-21 11:31:38,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:38,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922491724] [2020-09-21 11:31:38,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:38,190 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:38,191 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:38,191 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:38,191 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:38,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:38,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-21 11:31:38,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:38,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:38,737 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:38,737 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:38,737 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:38,737 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:38,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:38,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:38,744 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:38,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922491724] [2020-09-21 11:31:38,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:38,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-21 11:31:38,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965567229] [2020-09-21 11:31:38,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-21 11:31:38,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-21 11:31:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:31:38,746 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-09-21 11:31:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:38,963 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-09-21 11:31:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-21 11:31:38,964 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-09-21 11:31:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:38,965 INFO L225 Difference]: With dead ends: 74 [2020-09-21 11:31:38,965 INFO L226 Difference]: Without dead ends: 68 [2020-09-21 11:31:38,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-09-21 11:31:38,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-21 11:31:38,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-21 11:31:38,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-21 11:31:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-21 11:31:38,971 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-09-21 11:31:38,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:38,972 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-21 11:31:38,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-21 11:31:38,972 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-21 11:31:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-21 11:31:38,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:38,973 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:38,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-21 11:31:38,973 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:38,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:38,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2023563597, now seen corresponding path program 27 times [2020-09-21 11:31:38,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:38,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682483146] [2020-09-21 11:31:38,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:39,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:39,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-09-21 11:31:39,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-21 11:31:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:39,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-21 11:31:39,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:39,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:39,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:39,751 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:39,751 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:39,752 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:39,752 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:39,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:39,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:39,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:39,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:39,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:39,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:39,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:39,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:39,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682483146] [2020-09-21 11:31:39,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:39,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-21 11:31:39,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515929525] [2020-09-21 11:31:39,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-21 11:31:39,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-21 11:31:39,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:31:39,762 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-09-21 11:31:39,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:39,952 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-21 11:31:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-21 11:31:39,953 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-09-21 11:31:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:39,954 INFO L225 Difference]: With dead ends: 76 [2020-09-21 11:31:39,954 INFO L226 Difference]: Without dead ends: 70 [2020-09-21 11:31:39,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-09-21 11:31:39,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-21 11:31:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-09-21 11:31:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-21 11:31:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-09-21 11:31:39,962 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-09-21 11:31:39,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:39,962 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-09-21 11:31:39,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-21 11:31:39,963 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-09-21 11:31:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-21 11:31:39,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:39,963 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:39,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-21 11:31:39,964 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:39,964 INFO L82 PathProgramCache]: Analyzing trace with hash 134846677, now seen corresponding path program 28 times [2020-09-21 11:31:39,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:39,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967086029] [2020-09-21 11:31:39,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:40,142 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:40,143 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:40,143 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:40,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:40,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-21 11:31:40,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:40,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-21 11:31:40,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-21 11:31:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:40,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-21 11:31:40,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:40,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:40,916 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:40,916 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:40,916 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:40,917 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:40,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:40,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:40,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:40,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:40,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:40,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:40,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:40,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:40,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967086029] [2020-09-21 11:31:40,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:40,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-21 11:31:40,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223552164] [2020-09-21 11:31:40,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-21 11:31:40,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-21 11:31:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:31:40,936 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-09-21 11:31:41,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:41,220 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-09-21 11:31:41,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-21 11:31:41,220 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-09-21 11:31:41,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:41,222 INFO L225 Difference]: With dead ends: 78 [2020-09-21 11:31:41,222 INFO L226 Difference]: Without dead ends: 72 [2020-09-21 11:31:41,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-09-21 11:31:41,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-21 11:31:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-09-21 11:31:41,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-21 11:31:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-09-21 11:31:41,229 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-09-21 11:31:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:41,230 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-09-21 11:31:41,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-21 11:31:41,230 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-09-21 11:31:41,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-21 11:31:41,231 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:41,231 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:41,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-21 11:31:41,232 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:41,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:41,233 INFO L82 PathProgramCache]: Analyzing trace with hash -102083977, now seen corresponding path program 29 times [2020-09-21 11:31:41,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:41,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512140642] [2020-09-21 11:31:41,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:41,422 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:41,422 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:41,422 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:41,422 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-21 11:31:41,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:41,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-21 11:31:41,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:42,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:42,098 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:42,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:42,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:42,106 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:42,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512140642] [2020-09-21 11:31:42,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:42,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-21 11:31:42,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052872739] [2020-09-21 11:31:42,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-21 11:31:42,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:42,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-21 11:31:42,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:31:42,109 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-09-21 11:31:42,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:42,323 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-09-21 11:31:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-21 11:31:42,324 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-09-21 11:31:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:42,325 INFO L225 Difference]: With dead ends: 80 [2020-09-21 11:31:42,325 INFO L226 Difference]: Without dead ends: 74 [2020-09-21 11:31:42,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-09-21 11:31:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-21 11:31:42,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-09-21 11:31:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-21 11:31:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-09-21 11:31:42,331 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-09-21 11:31:42,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:42,331 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-09-21 11:31:42,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-21 11:31:42,331 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-09-21 11:31:42,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-21 11:31:42,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:42,332 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:42,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-21 11:31:42,333 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -159175783, now seen corresponding path program 30 times [2020-09-21 11:31:42,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:42,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32173390] [2020-09-21 11:31:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:42,492 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:42,492 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:42,492 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:42,493 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:42,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-21 11:31:42,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:42,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-09-21 11:31:42,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:42,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-21 11:31:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:42,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-21 11:31:42,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:43,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:43,253 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:43,253 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:43,254 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:43,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:43,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:43,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:43,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:43,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:43,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:43,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:43,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32173390] [2020-09-21 11:31:43,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:43,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-21 11:31:43,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561104413] [2020-09-21 11:31:43,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-21 11:31:43,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-21 11:31:43,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:31:43,269 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-09-21 11:31:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:43,533 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-09-21 11:31:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-21 11:31:43,534 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-09-21 11:31:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:43,535 INFO L225 Difference]: With dead ends: 82 [2020-09-21 11:31:43,535 INFO L226 Difference]: Without dead ends: 76 [2020-09-21 11:31:43,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-09-21 11:31:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-21 11:31:43,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-09-21 11:31:43,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-21 11:31:43,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-09-21 11:31:43,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-09-21 11:31:43,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:43,541 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-09-21 11:31:43,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-21 11:31:43,541 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-09-21 11:31:43,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-21 11:31:43,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:43,542 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:43,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-21 11:31:43,542 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:43,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash 810173499, now seen corresponding path program 31 times [2020-09-21 11:31:43,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:43,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895897179] [2020-09-21 11:31:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:43,704 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:43,704 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:43,704 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:43,704 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:43,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-21 11:31:43,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:43,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-21 11:31:43,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-21 11:31:43,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-21 11:31:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:44,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:44,431 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:44,431 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:44,432 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:44,432 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:44,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:44,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:44,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:44,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:44,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:44,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:44,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:44,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895897179] [2020-09-21 11:31:44,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:44,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-21 11:31:44,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168915819] [2020-09-21 11:31:44,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-21 11:31:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:44,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-21 11:31:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:31:44,445 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-09-21 11:31:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:44,628 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-09-21 11:31:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-21 11:31:44,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-09-21 11:31:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:44,630 INFO L225 Difference]: With dead ends: 84 [2020-09-21 11:31:44,630 INFO L226 Difference]: Without dead ends: 78 [2020-09-21 11:31:44,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-09-21 11:31:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-21 11:31:44,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-09-21 11:31:44,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-21 11:31:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-21 11:31:44,638 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-09-21 11:31:44,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:44,638 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-21 11:31:44,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-21 11:31:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-21 11:31:44,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-21 11:31:44,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:44,639 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:44,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-21 11:31:44,640 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:44,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:44,643 INFO L82 PathProgramCache]: Analyzing trace with hash 346930269, now seen corresponding path program 32 times [2020-09-21 11:31:44,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:44,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963048011] [2020-09-21 11:31:44,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:44,840 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:44,841 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:44,841 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:44,841 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:44,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:44,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-21 11:31:44,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:45,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:45,575 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:45,576 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:45,576 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:45,576 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:45,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:45,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:45,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:45,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:45,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963048011] [2020-09-21 11:31:45,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:45,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-21 11:31:45,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276389969] [2020-09-21 11:31:45,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-21 11:31:45,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:45,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-21 11:31:45,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:31:45,589 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-09-21 11:31:45,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:45,773 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-09-21 11:31:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-21 11:31:45,774 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-09-21 11:31:45,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:45,775 INFO L225 Difference]: With dead ends: 86 [2020-09-21 11:31:45,775 INFO L226 Difference]: Without dead ends: 80 [2020-09-21 11:31:45,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-09-21 11:31:45,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-21 11:31:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-09-21 11:31:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-21 11:31:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-09-21 11:31:45,781 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-09-21 11:31:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:45,781 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-09-21 11:31:45,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-21 11:31:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-09-21 11:31:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-21 11:31:45,782 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:45,783 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:45,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-21 11:31:45,783 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:45,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:45,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1846785023, now seen corresponding path program 33 times [2020-09-21 11:31:45,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:45,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510276493] [2020-09-21 11:31:45,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:45,976 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:45,976 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:45,976 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:45,977 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:45,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-21 11:31:45,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:45,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-09-21 11:31:45,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-21 11:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:45,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-21 11:31:45,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:46,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:46,869 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:46,869 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:46,869 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:46,870 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:46,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:46,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:46,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:46,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:46,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:46,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:46,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:46,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510276493] [2020-09-21 11:31:46,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:46,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-21 11:31:46,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389548489] [2020-09-21 11:31:46,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-21 11:31:46,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:46,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-21 11:31:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:31:46,881 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-09-21 11:31:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:47,146 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-09-21 11:31:47,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-21 11:31:47,147 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-09-21 11:31:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:47,148 INFO L225 Difference]: With dead ends: 88 [2020-09-21 11:31:47,148 INFO L226 Difference]: Without dead ends: 82 [2020-09-21 11:31:47,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-09-21 11:31:47,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-21 11:31:47,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-09-21 11:31:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-21 11:31:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-09-21 11:31:47,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-09-21 11:31:47,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:47,153 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-09-21 11:31:47,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-21 11:31:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-09-21 11:31:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-21 11:31:47,154 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:47,154 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:47,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-21 11:31:47,154 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:47,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:47,154 INFO L82 PathProgramCache]: Analyzing trace with hash 98192161, now seen corresponding path program 34 times [2020-09-21 11:31:47,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:47,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637299295] [2020-09-21 11:31:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:47,342 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:47,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-21 11:31:47,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:47,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-21 11:31:47,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:47,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-21 11:31:47,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:48,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:48,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:48,170 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:48,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:48,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:48,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:48,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:48,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637299295] [2020-09-21 11:31:48,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:48,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-21 11:31:48,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450250476] [2020-09-21 11:31:48,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-21 11:31:48,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:48,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-21 11:31:48,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:31:48,182 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-09-21 11:31:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:48,417 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-21 11:31:48,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-21 11:31:48,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-09-21 11:31:48,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:48,419 INFO L225 Difference]: With dead ends: 90 [2020-09-21 11:31:48,419 INFO L226 Difference]: Without dead ends: 84 [2020-09-21 11:31:48,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-09-21 11:31:48,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-21 11:31:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-09-21 11:31:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-21 11:31:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-09-21 11:31:48,424 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-09-21 11:31:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:48,425 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-09-21 11:31:48,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-21 11:31:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-09-21 11:31:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-21 11:31:48,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:48,426 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:48,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-21 11:31:48,426 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:48,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash -967335485, now seen corresponding path program 35 times [2020-09-21 11:31:48,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:48,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [563279491] [2020-09-21 11:31:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:48,627 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:48,627 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:48,627 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:48,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-09-21 11:31:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-21 11:31:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:49,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:49,605 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:49,605 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:49,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:49,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:49,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:49,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [563279491] [2020-09-21 11:31:49,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:49,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-21 11:31:49,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317315754] [2020-09-21 11:31:49,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-21 11:31:49,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:49,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-21 11:31:49,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:31:49,616 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-09-21 11:31:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:49,797 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-09-21 11:31:49,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-21 11:31:49,798 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-09-21 11:31:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:49,799 INFO L225 Difference]: With dead ends: 92 [2020-09-21 11:31:49,799 INFO L226 Difference]: Without dead ends: 86 [2020-09-21 11:31:49,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-09-21 11:31:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-21 11:31:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-21 11:31:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-21 11:31:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-09-21 11:31:49,804 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-09-21 11:31:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:49,804 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-09-21 11:31:49,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-21 11:31:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-09-21 11:31:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-21 11:31:49,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:49,805 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:49,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-21 11:31:49,806 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:49,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:49,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1557780453, now seen corresponding path program 36 times [2020-09-21 11:31:49,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:49,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187511675] [2020-09-21 11:31:49,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:50,007 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:50,007 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:50,007 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:50,007 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-21 11:31:50,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:50,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-21 11:31:50,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:51,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:51,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:51,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:51,052 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:51,052 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:51,052 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:51,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:51,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:51,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187511675] [2020-09-21 11:31:51,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:51,060 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-21 11:31:51,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342061] [2020-09-21 11:31:51,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-21 11:31:51,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-21 11:31:51,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:31:51,062 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-09-21 11:31:51,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:51,348 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-09-21 11:31:51,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-21 11:31:51,348 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-09-21 11:31:51,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:51,349 INFO L225 Difference]: With dead ends: 94 [2020-09-21 11:31:51,350 INFO L226 Difference]: Without dead ends: 88 [2020-09-21 11:31:51,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-09-21 11:31:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-21 11:31:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-09-21 11:31:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-21 11:31:51,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-21 11:31:51,354 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-09-21 11:31:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:51,355 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-21 11:31:51,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-21 11:31:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-21 11:31:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-21 11:31:51,355 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:51,355 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:51,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-21 11:31:51,356 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1537674631, now seen corresponding path program 37 times [2020-09-21 11:31:51,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:51,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905734860] [2020-09-21 11:31:51,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:51,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:51,565 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:51,565 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:51,565 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:51,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-09-21 11:31:51,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:51,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-21 11:31:51,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:52,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:52,601 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:52,601 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:52,602 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:52,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:52,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:52,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:52,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:52,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:52,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:52,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:52,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905734860] [2020-09-21 11:31:52,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:52,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-21 11:31:52,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309923905] [2020-09-21 11:31:52,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-21 11:31:52,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-21 11:31:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 11:31:52,621 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-09-21 11:31:52,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:52,897 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-21 11:31:52,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-21 11:31:52,898 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-09-21 11:31:52,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:52,899 INFO L225 Difference]: With dead ends: 96 [2020-09-21 11:31:52,899 INFO L226 Difference]: Without dead ends: 90 [2020-09-21 11:31:52,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-09-21 11:31:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-21 11:31:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-09-21 11:31:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-21 11:31:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-09-21 11:31:52,904 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-09-21 11:31:52,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:52,904 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-09-21 11:31:52,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-21 11:31:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-09-21 11:31:52,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-09-21 11:31:52,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:52,908 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:52,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-21 11:31:52,908 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:52,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:52,908 INFO L82 PathProgramCache]: Analyzing trace with hash -604151127, now seen corresponding path program 38 times [2020-09-21 11:31:52,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:52,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11017895] [2020-09-21 11:31:52,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:53,150 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:53,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:53,151 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:53,151 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:53,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-09-21 11:31:53,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:53,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-09-21 11:31:53,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:53,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-21 11:31:53,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:53,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-21 11:31:53,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:54,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:54,264 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:54,264 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:54,265 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:54,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11017895] [2020-09-21 11:31:54,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:54,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-21 11:31:54,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844933986] [2020-09-21 11:31:54,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-21 11:31:54,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:54,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-21 11:31:54,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 11:31:54,276 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-09-21 11:31:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:54,568 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-09-21 11:31:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-21 11:31:54,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-09-21 11:31:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:54,570 INFO L225 Difference]: With dead ends: 98 [2020-09-21 11:31:54,570 INFO L226 Difference]: Without dead ends: 92 [2020-09-21 11:31:54,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-09-21 11:31:54,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-21 11:31:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-09-21 11:31:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-21 11:31:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-09-21 11:31:54,576 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-09-21 11:31:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:54,576 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-09-21 11:31:54,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-21 11:31:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-09-21 11:31:54,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-09-21 11:31:54,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:54,578 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:54,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-21 11:31:54,578 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:54,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1609369781, now seen corresponding path program 39 times [2020-09-21 11:31:54,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:54,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153454540] [2020-09-21 11:31:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:54,810 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:54,811 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:54,811 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:54,811 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:54,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-09-21 11:31:54,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-09-21 11:31:54,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:54,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-09-21 11:31:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-09-21 11:31:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:56,015 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:56,016 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:56,016 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:56,016 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:56,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:56,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:56,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:56,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:56,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:56,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:56,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:56,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153454540] [2020-09-21 11:31:56,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:56,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-21 11:31:56,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915551856] [2020-09-21 11:31:56,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-21 11:31:56,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-21 11:31:56,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 11:31:56,028 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-09-21 11:31:56,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:56,353 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-09-21 11:31:56,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-21 11:31:56,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-09-21 11:31:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:56,357 INFO L225 Difference]: With dead ends: 100 [2020-09-21 11:31:56,358 INFO L226 Difference]: Without dead ends: 94 [2020-09-21 11:31:56,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-09-21 11:31:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-21 11:31:56,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-09-21 11:31:56,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-21 11:31:56,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-09-21 11:31:56,363 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-09-21 11:31:56,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:56,363 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-09-21 11:31:56,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-21 11:31:56,364 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-09-21 11:31:56,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-09-21 11:31:56,364 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:56,365 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:56,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-21 11:31:56,365 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1256854675, now seen corresponding path program 40 times [2020-09-21 11:31:56,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:56,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420637871] [2020-09-21 11:31:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:56,614 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:56,614 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:56,614 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:56,614 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:56,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-09-21 11:31:56,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:56,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-09-21 11:31:56,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-21 11:31:56,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:56,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-21 11:31:56,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:57,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:57,800 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:57,800 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:57,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:57,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420637871] [2020-09-21 11:31:57,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:57,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-21 11:31:57,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682191914] [2020-09-21 11:31:57,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-21 11:31:57,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:57,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-21 11:31:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-09-21 11:31:57,811 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-09-21 11:31:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:58,033 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-09-21 11:31:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-21 11:31:58,033 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-09-21 11:31:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:58,035 INFO L225 Difference]: With dead ends: 102 [2020-09-21 11:31:58,035 INFO L226 Difference]: Without dead ends: 96 [2020-09-21 11:31:58,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-09-21 11:31:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-21 11:31:58,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-09-21 11:31:58,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-21 11:31:58,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-09-21 11:31:58,045 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-09-21 11:31:58,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:58,045 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-09-21 11:31:58,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-21 11:31:58,045 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-09-21 11:31:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-09-21 11:31:58,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:58,048 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:58,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-21 11:31:58,049 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:58,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:58,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1792254193, now seen corresponding path program 41 times [2020-09-21 11:31:58,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:58,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662492553] [2020-09-21 11:31:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:58,319 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:58,319 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:58,319 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:58,320 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:58,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-09-21 11:31:58,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:58,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 234 [2020-09-21 11:31:58,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:58,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-09-21 11:31:58,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:58,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-21 11:31:58,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,500 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,501 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,501 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,502 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:31:59,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:59,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:59,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662492553] [2020-09-21 11:31:59,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:59,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-21 11:31:59,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568039193] [2020-09-21 11:31:59,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-21 11:31:59,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:59,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-21 11:31:59,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 11:31:59,525 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-09-21 11:31:59,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:59,861 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-09-21 11:31:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-21 11:31:59,862 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-09-21 11:31:59,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:59,863 INFO L225 Difference]: With dead ends: 104 [2020-09-21 11:31:59,863 INFO L226 Difference]: Without dead ends: 98 [2020-09-21 11:31:59,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-09-21 11:31:59,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-21 11:31:59,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-09-21 11:31:59,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-21 11:31:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-21 11:31:59,869 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-09-21 11:31:59,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-21 11:31:59,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-21 11:31:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-21 11:31:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-21 11:31:59,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:59,871 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:59,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-21 11:31:59,872 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:59,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:59,872 INFO L82 PathProgramCache]: Analyzing trace with hash -915115471, now seen corresponding path program 42 times [2020-09-21 11:31:59,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:59,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003012222] [2020-09-21 11:31:59,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,175 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,175 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,175 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,176 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-21 11:32:00,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-09-21 11:32:00,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-21 11:32:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:00,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-21 11:32:00,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:01,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:01,570 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:01,570 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:01,570 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:01,570 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:01,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:01,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:01,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003012222] [2020-09-21 11:32:01,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:01,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-21 11:32:01,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709184595] [2020-09-21 11:32:01,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-21 11:32:01,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:01,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-21 11:32:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-09-21 11:32:01,582 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-09-21 11:32:01,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:01,778 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-09-21 11:32:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-21 11:32:01,779 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-09-21 11:32:01,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:01,780 INFO L225 Difference]: With dead ends: 106 [2020-09-21 11:32:01,780 INFO L226 Difference]: Without dead ends: 100 [2020-09-21 11:32:01,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-09-21 11:32:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-21 11:32:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-09-21 11:32:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-21 11:32:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-09-21 11:32:01,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-09-21 11:32:01,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:01,785 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-09-21 11:32:01,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-21 11:32:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-09-21 11:32:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-09-21 11:32:01,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:01,786 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:01,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-21 11:32:01,787 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:01,787 INFO L82 PathProgramCache]: Analyzing trace with hash 201606355, now seen corresponding path program 43 times [2020-09-21 11:32:01,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:01,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879834761] [2020-09-21 11:32:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:02,065 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:02,065 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:02,065 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:02,065 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:02,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:02,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-09-21 11:32:02,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:03,495 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:03,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:03,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:03,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:03,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:03,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879834761] [2020-09-21 11:32:03,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:03,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-21 11:32:03,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852442077] [2020-09-21 11:32:03,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-21 11:32:03,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:03,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-21 11:32:03,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 11:32:03,507 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-09-21 11:32:03,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:03,843 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-09-21 11:32:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-21 11:32:03,844 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-09-21 11:32:03,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:03,845 INFO L225 Difference]: With dead ends: 108 [2020-09-21 11:32:03,845 INFO L226 Difference]: Without dead ends: 102 [2020-09-21 11:32:03,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-09-21 11:32:03,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-21 11:32:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-09-21 11:32:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-21 11:32:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-09-21 11:32:03,850 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-09-21 11:32:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:03,851 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-09-21 11:32:03,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-21 11:32:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-09-21 11:32:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-09-21 11:32:03,852 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:03,852 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:03,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-21 11:32:03,852 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:03,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:03,852 INFO L82 PathProgramCache]: Analyzing trace with hash -370542859, now seen corresponding path program 44 times [2020-09-21 11:32:03,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:03,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509709968] [2020-09-21 11:32:03,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:03,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:04,127 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:04,127 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:04,127 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:04,127 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:04,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-09-21 11:32:04,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:04,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-09-21 11:32:04,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:04,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-21 11:32:04,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:04,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-21 11:32:04,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:05,579 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:05,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:05,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:05,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:05,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509709968] [2020-09-21 11:32:05,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:05,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-21 11:32:05,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240841038] [2020-09-21 11:32:05,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-21 11:32:05,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:05,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-21 11:32:05,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-09-21 11:32:05,591 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-09-21 11:32:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:05,857 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-09-21 11:32:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-21 11:32:05,858 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-09-21 11:32:05,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:05,859 INFO L225 Difference]: With dead ends: 110 [2020-09-21 11:32:05,859 INFO L226 Difference]: Without dead ends: 104 [2020-09-21 11:32:05,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-09-21 11:32:05,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-21 11:32:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-09-21 11:32:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-21 11:32:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-09-21 11:32:05,864 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-09-21 11:32:05,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:05,864 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-09-21 11:32:05,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-21 11:32:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-09-21 11:32:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-09-21 11:32:05,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:05,865 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:05,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-21 11:32:05,866 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:05,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:05,866 INFO L82 PathProgramCache]: Analyzing trace with hash -450123625, now seen corresponding path program 45 times [2020-09-21 11:32:05,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:05,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949265434] [2020-09-21 11:32:05,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:06,106 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:06,107 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:06,107 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:06,107 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:06,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-09-21 11:32:06,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-21 11:32:06,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:07,697 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:07,697 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:07,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:07,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:07,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:07,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949265434] [2020-09-21 11:32:07,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:07,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-21 11:32:07,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155117379] [2020-09-21 11:32:07,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-21 11:32:07,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-21 11:32:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 11:32:07,709 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-09-21 11:32:07,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:07,947 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-09-21 11:32:07,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-21 11:32:07,948 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-09-21 11:32:07,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:07,949 INFO L225 Difference]: With dead ends: 112 [2020-09-21 11:32:07,949 INFO L226 Difference]: Without dead ends: 106 [2020-09-21 11:32:07,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-09-21 11:32:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-21 11:32:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-09-21 11:32:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-21 11:32:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-09-21 11:32:07,954 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-09-21 11:32:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:07,954 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-09-21 11:32:07,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-21 11:32:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-09-21 11:32:07,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-21 11:32:07,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:07,956 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:07,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-21 11:32:07,956 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 46 times [2020-09-21 11:32:07,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:07,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292162028] [2020-09-21 11:32:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:07,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:08,232 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:08,232 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:08,232 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-21 11:32:08,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:09,853 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:09,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:09,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:09,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:09,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:09,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:09,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292162028] [2020-09-21 11:32:09,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:09,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-21 11:32:09,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072213617] [2020-09-21 11:32:09,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-21 11:32:09,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:09,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-21 11:32:09,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-09-21 11:32:09,867 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-09-21 11:32:10,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:10,088 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-09-21 11:32:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-21 11:32:10,089 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-09-21 11:32:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:10,090 INFO L225 Difference]: With dead ends: 114 [2020-09-21 11:32:10,090 INFO L226 Difference]: Without dead ends: 108 [2020-09-21 11:32:10,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-09-21 11:32:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-21 11:32:10,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-09-21 11:32:10,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-21 11:32:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-09-21 11:32:10,095 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-09-21 11:32:10,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:10,095 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-09-21 11:32:10,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-21 11:32:10,095 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-09-21 11:32:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-21 11:32:10,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:10,096 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:10,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-21 11:32:10,097 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:10,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:10,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1353943643, now seen corresponding path program 47 times [2020-09-21 11:32:10,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:10,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080969759] [2020-09-21 11:32:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:10,373 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 245 [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:10,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-09-21 11:32:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:10,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-09-21 11:32:10,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,109 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,110 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,110 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:12,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:12,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:12,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080969759] [2020-09-21 11:32:12,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:12,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-21 11:32:12,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989308795] [2020-09-21 11:32:12,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-21 11:32:12,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-21 11:32:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-09-21 11:32:12,133 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-09-21 11:32:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:12,345 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-09-21 11:32:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-21 11:32:12,346 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-09-21 11:32:12,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:12,347 INFO L225 Difference]: With dead ends: 116 [2020-09-21 11:32:12,347 INFO L226 Difference]: Without dead ends: 110 [2020-09-21 11:32:12,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-09-21 11:32:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-21 11:32:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-09-21 11:32:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-21 11:32:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-09-21 11:32:12,353 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-09-21 11:32:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:12,353 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-09-21 11:32:12,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-21 11:32:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-09-21 11:32:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-09-21 11:32:12,354 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:12,354 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:12,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-21 11:32:12,355 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:12,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1075971459, now seen corresponding path program 48 times [2020-09-21 11:32:12,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:12,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777962322] [2020-09-21 11:32:12,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:12,659 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:12,659 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:12,659 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:12,659 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-09-21 11:32:12,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:14,465 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:14,465 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:14,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:14,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777962322] [2020-09-21 11:32:14,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:14,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-21 11:32:14,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974002381] [2020-09-21 11:32:14,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-21 11:32:14,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-21 11:32:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-09-21 11:32:14,480 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-09-21 11:32:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:14,747 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-09-21 11:32:14,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-21 11:32:14,748 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-09-21 11:32:14,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:14,750 INFO L225 Difference]: With dead ends: 118 [2020-09-21 11:32:14,750 INFO L226 Difference]: Without dead ends: 112 [2020-09-21 11:32:14,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-09-21 11:32:14,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-21 11:32:14,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-09-21 11:32:14,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-21 11:32:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-09-21 11:32:14,756 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-09-21 11:32:14,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:14,757 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-09-21 11:32:14,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-21 11:32:14,757 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-09-21 11:32:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-09-21 11:32:14,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:14,758 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:14,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-21 11:32:14,758 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash 237824543, now seen corresponding path program 49 times [2020-09-21 11:32:14,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:14,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765630198] [2020-09-21 11:32:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:15,085 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 284 [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:15,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-09-21 11:32:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:15,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-09-21 11:32:15,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:16,974 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:16,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:16,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:16,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:16,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:16,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765630198] [2020-09-21 11:32:16,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:16,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-21 11:32:16,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618512360] [2020-09-21 11:32:16,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-21 11:32:16,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-21 11:32:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 11:32:16,988 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-09-21 11:32:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:17,293 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-09-21 11:32:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-21 11:32:17,293 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-09-21 11:32:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:17,295 INFO L225 Difference]: With dead ends: 120 [2020-09-21 11:32:17,295 INFO L226 Difference]: Without dead ends: 114 [2020-09-21 11:32:17,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-09-21 11:32:17,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-21 11:32:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-09-21 11:32:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-21 11:32:17,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-09-21 11:32:17,299 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-09-21 11:32:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:17,299 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-09-21 11:32:17,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-21 11:32:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-09-21 11:32:17,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-21 11:32:17,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:17,301 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:17,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-21 11:32:17,301 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash 75397441, now seen corresponding path program 50 times [2020-09-21 11:32:17,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:17,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234552022] [2020-09-21 11:32:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:17,685 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:17,685 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:17,686 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:17,686 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:17,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-09-21 11:32:17,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:17,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-09-21 11:32:17,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-09-21 11:32:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-21 11:32:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0