/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:44:15,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:44:15,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:44:15,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:44:15,108 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:44:15,116 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:44:15,119 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:44:15,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:44:15,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:44:15,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:44:15,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:44:15,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:44:15,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:44:15,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:44:15,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:44:15,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:44:15,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:44:15,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:44:15,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:44:15,154 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:44:15,156 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:44:15,157 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:44:15,158 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:44:15,159 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:44:15,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:44:15,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:44:15,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:44:15,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:44:15,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:44:15,175 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-24 22:44:15,180 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:44:15,181 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:44:15,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:44:15,183 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 [2020-09-24 22:44:15,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:44:15,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:44:15,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:44:15,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:44:15,230 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:44:15,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:44:15,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:44:15,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:44:15,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:44:15,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:44:15,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:44:15,232 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:44:15,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:44:15,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:44:15,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:44:15,233 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:44:15,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:44:15,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:44:15,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:44:15,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:44:15,234 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:44:15,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:44:15,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:44:15,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:44:15,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:44:15,235 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:44:15,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:44:15,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:44:15,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:44:15,236 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.rcfgbuilder: Size of a code block -> SingleStatement 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;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;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;enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:44:15,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:44:15,688 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:44:15,691 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:44:15,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:44:15,693 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:44:15,694 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 22:44:15,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d72c1c4dd/11b6c5de5fd64e87bf73ded41518b7b8/FLAG58a6a1826 [2020-09-24 22:44:16,340 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:44:16,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-24 22:44:16,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d72c1c4dd/11b6c5de5fd64e87bf73ded41518b7b8/FLAG58a6a1826 [2020-09-24 22:44:16,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d72c1c4dd/11b6c5de5fd64e87bf73ded41518b7b8 [2020-09-24 22:44:16,691 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:44:16,697 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:44:16,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:44:16,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:44:16,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:44:16,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:44:16" (1/1) ... [2020-09-24 22:44:16,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:16, skipping insertion in model container [2020-09-24 22:44:16,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:44:16" (1/1) ... [2020-09-24 22:44:16,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:44:16,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:44:16,991 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:44:17,002 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:44:17,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:44:17,167 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:44:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17 WrapperNode [2020-09-24 22:44:17,170 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:44:17,171 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:44:17,171 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:44:17,171 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:44:17,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (1/1) ... [2020-09-24 22:44:17,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:44:17,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:44:17,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:44:17,247 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:44:17,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (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 [2020-09-24 22:44:17,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:44:17,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:44:17,336 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 22:44:17,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:44:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:44:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 22:44:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 22:44:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:44:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:44:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:44:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:44:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:44:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:44:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:44:17,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:44:17,697 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 22:44:17,703 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:44:17 BoogieIcfgContainer [2020-09-24 22:44:17,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:44:17,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:44:17,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:44:17,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:44:17,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:44:16" (1/3) ... [2020-09-24 22:44:17,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28834f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:44:17, skipping insertion in model container [2020-09-24 22:44:17,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:44:17" (2/3) ... [2020-09-24 22:44:17,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28834f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:44:17, skipping insertion in model container [2020-09-24 22:44:17,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:44:17" (3/3) ... [2020-09-24 22:44:17,714 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-24 22:44:17,725 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:44:17,733 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:44:17,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:44:17,783 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:44:17,783 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:44:17,783 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:44:17,783 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:44:17,783 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:44:17,784 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:44:17,784 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:44:17,784 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:44:17,810 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-09-24 22:44:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-24 22:44:17,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:17,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:17,822 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash 2031307650, now seen corresponding path program 1 times [2020-09-24 22:44:17,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:17,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681324038] [2020-09-24 22:44:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:17,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:18,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:18,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:18,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:18,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-09-24 22:44:18,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 22:44:18,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-09-24 22:44:18,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:18,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-24 22:44:18,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:18,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:44:18,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:18,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:18,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:18,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:18,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:18,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-24 22:44:18,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:18,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:18,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:44:18,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-24 22:44:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:18,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:18,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:18,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:18,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:18,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 22:44:18,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:18,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:18,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:18,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:18,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681324038] [2020-09-24 22:44:18,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:44:18,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 22:44:18,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179348032] [2020-09-24 22:44:18,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 22:44:18,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:18,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 22:44:18,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:44:18,476 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-09-24 22:44:18,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:18,678 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2020-09-24 22:44:18,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 22:44:18,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2020-09-24 22:44:18,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:18,701 INFO L225 Difference]: With dead ends: 102 [2020-09-24 22:44:18,702 INFO L226 Difference]: Without dead ends: 53 [2020-09-24 22:44:18,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 22:44:18,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-24 22:44:18,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-09-24 22:44:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 22:44:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-24 22:44:18,776 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2020-09-24 22:44:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:18,777 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-24 22:44:18,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 22:44:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-24 22:44:18,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 22:44:18,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:18,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:18,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:44:18,783 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:18,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 897550373, now seen corresponding path program 1 times [2020-09-24 22:44:18,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:18,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030227540] [2020-09-24 22:44:18,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:18,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:18,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:18,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 22:44:18,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:18,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-24 22:44:18,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:18,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 22:44:18,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:18,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 22:44:18,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:18,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:18,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:19,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:19,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:19,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:19,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:19,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:19,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:19,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:19,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-24 22:44:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:19,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:19,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:19,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:19,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:19,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 22:44:19,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:19,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:19,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:19,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030227540] [2020-09-24 22:44:19,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:44:19,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:44:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47095215] [2020-09-24 22:44:19,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:44:19,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:19,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:44:19,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:44:19,046 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 4 states. [2020-09-24 22:44:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:19,183 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2020-09-24 22:44:19,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:44:19,184 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-09-24 22:44:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:19,186 INFO L225 Difference]: With dead ends: 92 [2020-09-24 22:44:19,186 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 22:44:19,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:44:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 22:44:19,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 54. [2020-09-24 22:44:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-24 22:44:19,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-24 22:44:19,197 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 39 [2020-09-24 22:44:19,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:19,198 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-24 22:44:19,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:44:19,198 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-24 22:44:19,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-24 22:44:19,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:19,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:19,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:44:19,200 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1785369867, now seen corresponding path program 1 times [2020-09-24 22:44:19,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:19,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274473501] [2020-09-24 22:44:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:19,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:19,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:19,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-09-24 22:44:19,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:19,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-09-24 22:44:19,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:19,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 22:44:19,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:19,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 22:44:19,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:44:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:19,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:19,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:19,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:19,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:19,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 22:44:19,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:19,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:19,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:19,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:19,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-24 22:44:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:19,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:19,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:19,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:19,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:19,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 22:44:19,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:19,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:19,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:19,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:19,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274473501] [2020-09-24 22:44:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 22:44:19,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373057247] [2020-09-24 22:44:19,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 22:44:19,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:19,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 22:44:19,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 22:44:19,574 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 6 states. [2020-09-24 22:44:19,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:19,761 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-09-24 22:44:19,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 22:44:19,761 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-09-24 22:44:19,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:19,763 INFO L225 Difference]: With dead ends: 102 [2020-09-24 22:44:19,763 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 22:44:19,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:44:19,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 22:44:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-09-24 22:44:19,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 22:44:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-09-24 22:44:19,773 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 49 [2020-09-24 22:44:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:19,774 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-09-24 22:44:19,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 22:44:19,774 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-09-24 22:44:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 22:44:19,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:19,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:19,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 22:44:19,777 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 862927473, now seen corresponding path program 2 times [2020-09-24 22:44:19,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:19,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723120515] [2020-09-24 22:44:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:20,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:20,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 22:44:20,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:20,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 262 [2020-09-24 22:44:20,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:20,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 22:44:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:20,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 22:44:20,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 22:44:20,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:20,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:20,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:20,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:20,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:20,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:44:20,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:20,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:20,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:20,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:20,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-24 22:44:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:20,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:20,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:20,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:20,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:20,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 22:44:20,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:20,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:20,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:20,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:20,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723120515] [2020-09-24 22:44:20,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:20,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 22:44:20,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338029014] [2020-09-24 22:44:20,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 22:44:20,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:20,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 22:44:20,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 22:44:20,207 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 8 states. [2020-09-24 22:44:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:20,452 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2020-09-24 22:44:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 22:44:20,453 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-09-24 22:44:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:20,454 INFO L225 Difference]: With dead ends: 112 [2020-09-24 22:44:20,454 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 22:44:20,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:44:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 22:44:20,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2020-09-24 22:44:20,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 22:44:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2020-09-24 22:44:20,474 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 59 [2020-09-24 22:44:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:20,475 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2020-09-24 22:44:20,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 22:44:20,475 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2020-09-24 22:44:20,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-24 22:44:20,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:20,476 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:20,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 22:44:20,479 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:20,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1103681623, now seen corresponding path program 3 times [2020-09-24 22:44:20,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:20,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203070265] [2020-09-24 22:44:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:20,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:20,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:20,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-24 22:44:20,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:20,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-09-24 22:44:20,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 22:44:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:20,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 22:44:20,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:21,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:21,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:21,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:21,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:21,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:21,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:21,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:21,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:21,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-24 22:44:21,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:21,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:21,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:21,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:21,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:21,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:21,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:21,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:21,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:21,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:21,067 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:21,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203070265] [2020-09-24 22:44:21,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:21,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 22:44:21,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982643344] [2020-09-24 22:44:21,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 22:44:21,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:21,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 22:44:21,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 22:44:21,070 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 10 states. [2020-09-24 22:44:21,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:21,307 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2020-09-24 22:44:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 22:44:21,309 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-24 22:44:21,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:21,311 INFO L225 Difference]: With dead ends: 122 [2020-09-24 22:44:21,311 INFO L226 Difference]: Without dead ends: 92 [2020-09-24 22:44:21,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:44:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-24 22:44:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-09-24 22:44:21,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 22:44:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-09-24 22:44:21,335 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 69 [2020-09-24 22:44:21,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:21,335 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-09-24 22:44:21,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 22:44:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-09-24 22:44:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 22:44:21,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:21,339 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:21,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 22:44:21,341 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:21,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:21,341 INFO L82 PathProgramCache]: Analyzing trace with hash -67449155, now seen corresponding path program 4 times [2020-09-24 22:44:21,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:21,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213506002] [2020-09-24 22:44:21,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:21,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:21,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:21,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 22:44:21,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:21,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 499 [2020-09-24 22:44:21,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 22:44:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:21,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 22:44:21,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:22,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:22,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:22,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:22,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:22,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:44:22,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:22,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:22,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:22,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-24 22:44:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:22,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:22,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:22,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:22,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:22,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-24 22:44:22,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:22,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:22,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:22,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213506002] [2020-09-24 22:44:22,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:22,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 22:44:22,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803559079] [2020-09-24 22:44:22,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 22:44:22,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:22,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 22:44:22,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 22:44:22,065 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 12 states. [2020-09-24 22:44:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:22,432 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-09-24 22:44:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 22:44:22,433 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 79 [2020-09-24 22:44:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:22,438 INFO L225 Difference]: With dead ends: 132 [2020-09-24 22:44:22,439 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 22:44:22,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 22:44:22,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 22:44:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-09-24 22:44:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-24 22:44:22,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2020-09-24 22:44:22,460 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 79 [2020-09-24 22:44:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:22,461 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2020-09-24 22:44:22,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 22:44:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2020-09-24 22:44:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-24 22:44:22,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:22,464 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:22,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 22:44:22,464 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash -2083488349, now seen corresponding path program 5 times [2020-09-24 22:44:22,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:22,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408844094] [2020-09-24 22:44:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:22,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:23,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:23,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-09-24 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-09-24 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:23,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 22:44:23,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:23,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:23,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:23,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:23,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:23,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 22:44:23,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:23,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:23,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:23,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:23,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-24 22:44:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:23,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:23,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:23,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:23,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:23,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:23,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:23,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:23,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:23,432 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:23,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408844094] [2020-09-24 22:44:23,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:23,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 22:44:23,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824890204] [2020-09-24 22:44:23,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 22:44:23,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 22:44:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 22:44:23,436 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand 14 states. [2020-09-24 22:44:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:23,786 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2020-09-24 22:44:23,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 22:44:23,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 89 [2020-09-24 22:44:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:23,788 INFO L225 Difference]: With dead ends: 142 [2020-09-24 22:44:23,788 INFO L226 Difference]: Without dead ends: 112 [2020-09-24 22:44:23,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 22:44:23,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-24 22:44:23,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-09-24 22:44:23,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 22:44:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-09-24 22:44:23,810 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 89 [2020-09-24 22:44:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:23,811 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-09-24 22:44:23,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 22:44:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-09-24 22:44:23,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 22:44:23,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:23,816 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:23,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 22:44:23,816 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1012745481, now seen corresponding path program 6 times [2020-09-24 22:44:23,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:23,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479260275] [2020-09-24 22:44:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:23,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:24,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:24,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 22:44:24,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:24,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 753 [2020-09-24 22:44:24,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:24,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 22:44:24,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:24,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 22:44:24,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:24,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:24,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:24,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:24,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:24,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:24,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:24,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:24,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:24,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:24,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:24,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-24 22:44:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:24,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:24,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:24,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:24,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479260275] [2020-09-24 22:44:24,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:24,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 22:44:24,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98212206] [2020-09-24 22:44:24,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 22:44:24,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 22:44:24,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 22:44:24,889 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 16 states. [2020-09-24 22:44:25,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:25,451 INFO L93 Difference]: Finished difference Result 152 states and 154 transitions. [2020-09-24 22:44:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 22:44:25,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 99 [2020-09-24 22:44:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:25,455 INFO L225 Difference]: With dead ends: 152 [2020-09-24 22:44:25,455 INFO L226 Difference]: Without dead ends: 122 [2020-09-24 22:44:25,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 22:44:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-24 22:44:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2020-09-24 22:44:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-24 22:44:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-09-24 22:44:25,477 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 99 [2020-09-24 22:44:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:25,477 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-09-24 22:44:25,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 22:44:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-09-24 22:44:25,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-24 22:44:25,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:25,482 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:25,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 22:44:25,483 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:25,484 INFO L82 PathProgramCache]: Analyzing trace with hash -805534481, now seen corresponding path program 7 times [2020-09-24 22:44:25,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:25,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176434629] [2020-09-24 22:44:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:25,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:26,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:26,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 22:44:26,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:26,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 889 [2020-09-24 22:44:26,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 22:44:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:26,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 22:44:26,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:26,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:26,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:26,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:26,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:26,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:26,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:26,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:26,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:26,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:26,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:26,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-09-24 22:44:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:26,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:26,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:26,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:26,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:26,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 22:44:26,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:26,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:26,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:26,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:26,676 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:26,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176434629] [2020-09-24 22:44:26,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:26,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 22:44:26,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128007028] [2020-09-24 22:44:26,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 22:44:26,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:26,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 22:44:26,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 22:44:26,680 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 18 states. [2020-09-24 22:44:27,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:27,147 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2020-09-24 22:44:27,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 22:44:27,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-09-24 22:44:27,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:27,149 INFO L225 Difference]: With dead ends: 162 [2020-09-24 22:44:27,149 INFO L226 Difference]: Without dead ends: 132 [2020-09-24 22:44:27,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 22:44:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-24 22:44:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2020-09-24 22:44:27,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-09-24 22:44:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-09-24 22:44:27,156 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 109 [2020-09-24 22:44:27,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:27,156 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-09-24 22:44:27,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 22:44:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-09-24 22:44:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-09-24 22:44:27,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:27,158 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:27,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 22:44:27,159 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1236165291, now seen corresponding path program 8 times [2020-09-24 22:44:27,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:27,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701876286] [2020-09-24 22:44:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:27,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:28,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:28,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-09-24 22:44:28,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:28,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1266 [2020-09-24 22:44:28,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:28,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 22:44:28,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:28,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 22:44:28,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:28,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:28,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:28,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:28,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:28,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:28,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:28,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:28,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:28,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:28,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 22:44:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:28,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:28,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:28,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:28,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:28,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 22:44:28,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:28,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:28,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:28,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701876286] [2020-09-24 22:44:28,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:28,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 22:44:28,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897920000] [2020-09-24 22:44:28,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 22:44:28,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 22:44:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 22:44:28,760 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 20 states. [2020-09-24 22:44:29,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:29,270 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2020-09-24 22:44:29,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 22:44:29,271 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-09-24 22:44:29,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:29,272 INFO L225 Difference]: With dead ends: 172 [2020-09-24 22:44:29,272 INFO L226 Difference]: Without dead ends: 142 [2020-09-24 22:44:29,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 22:44:29,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-24 22:44:29,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 134. [2020-09-24 22:44:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-24 22:44:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2020-09-24 22:44:29,281 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 119 [2020-09-24 22:44:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:29,282 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2020-09-24 22:44:29,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 22:44:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2020-09-24 22:44:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-09-24 22:44:29,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:29,294 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:29,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 22:44:29,295 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:29,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:29,295 INFO L82 PathProgramCache]: Analyzing trace with hash 977792571, now seen corresponding path program 9 times [2020-09-24 22:44:29,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:29,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883042732] [2020-09-24 22:44:29,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:29,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-09-24 22:44:30,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1375 [2020-09-24 22:44:30,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 22:44:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 22:44:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:30,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:30,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:30,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:30,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:30,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:30,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:44:30,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:30,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-09-24 22:44:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:31,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:31,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:31,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:31,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:31,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:44:31,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:31,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:31,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:31,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:31,029 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:31,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883042732] [2020-09-24 22:44:31,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:31,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 22:44:31,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338725348] [2020-09-24 22:44:31,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 22:44:31,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 22:44:31,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 22:44:31,033 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 22 states. [2020-09-24 22:44:31,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:31,634 INFO L93 Difference]: Finished difference Result 182 states and 184 transitions. [2020-09-24 22:44:31,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 22:44:31,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 129 [2020-09-24 22:44:31,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:31,636 INFO L225 Difference]: With dead ends: 182 [2020-09-24 22:44:31,636 INFO L226 Difference]: Without dead ends: 152 [2020-09-24 22:44:31,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 22:44:31,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-24 22:44:31,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 144. [2020-09-24 22:44:31,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-24 22:44:31,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-09-24 22:44:31,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 129 [2020-09-24 22:44:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:31,644 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-09-24 22:44:31,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 22:44:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-09-24 22:44:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-24 22:44:31,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:31,646 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:31,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 22:44:31,647 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:31,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1234849, now seen corresponding path program 10 times [2020-09-24 22:44:31,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:31,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834100253] [2020-09-24 22:44:31,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:31,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:33,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:33,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-09-24 22:44:33,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:33,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1570 [2020-09-24 22:44:33,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 22:44:33,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:33,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-09-24 22:44:33,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:33,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:33,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:33,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:33,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:33,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 22:44:33,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:33,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:33,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2020-09-24 22:44:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:33,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:33,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:33,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:33,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:33,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:33,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:33,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:33,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:33,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834100253] [2020-09-24 22:44:33,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:33,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 22:44:33,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778824493] [2020-09-24 22:44:33,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 22:44:33,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:33,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 22:44:33,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-24 22:44:33,610 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 24 states. [2020-09-24 22:44:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:34,238 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2020-09-24 22:44:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 22:44:34,238 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 139 [2020-09-24 22:44:34,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:34,240 INFO L225 Difference]: With dead ends: 192 [2020-09-24 22:44:34,240 INFO L226 Difference]: Without dead ends: 162 [2020-09-24 22:44:34,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 22:44:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-24 22:44:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 154. [2020-09-24 22:44:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-24 22:44:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2020-09-24 22:44:34,250 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 139 [2020-09-24 22:44:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:34,250 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2020-09-24 22:44:34,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 22:44:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2020-09-24 22:44:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-24 22:44:34,252 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:34,253 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:34,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 22:44:34,253 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 187545991, now seen corresponding path program 11 times [2020-09-24 22:44:34,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:34,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844626072] [2020-09-24 22:44:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:34,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:35,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:35,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-09-24 22:44:35,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:35,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1707 [2020-09-24 22:44:35,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 22:44:35,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:35,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-09-24 22:44:35,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:36,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:36,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:36,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:36,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:36,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:36,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:36,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2020-09-24 22:44:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:36,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:36,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:36,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:36,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:36,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:44:36,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:36,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:36,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:36,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844626072] [2020-09-24 22:44:36,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:36,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 22:44:36,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891262152] [2020-09-24 22:44:36,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 22:44:36,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 22:44:36,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-24 22:44:36,384 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand 26 states. [2020-09-24 22:44:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:37,065 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2020-09-24 22:44:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 22:44:37,065 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 149 [2020-09-24 22:44:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:37,068 INFO L225 Difference]: With dead ends: 202 [2020-09-24 22:44:37,068 INFO L226 Difference]: Without dead ends: 172 [2020-09-24 22:44:37,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-24 22:44:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-24 22:44:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2020-09-24 22:44:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-09-24 22:44:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2020-09-24 22:44:37,077 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 149 [2020-09-24 22:44:37,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:37,078 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2020-09-24 22:44:37,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 22:44:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2020-09-24 22:44:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-09-24 22:44:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:37,082 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:37,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 22:44:37,083 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:37,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1146876909, now seen corresponding path program 12 times [2020-09-24 22:44:37,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:37,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454539746] [2020-09-24 22:44:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:39,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:39,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2004 [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:39,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-09-24 22:44:39,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:39,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:39,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:39,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:39,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:39,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:44:39,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:39,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:39,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:39,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2020-09-24 22:44:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:39,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:39,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:39,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:39,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:39,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 22:44:39,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:39,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:39,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:44:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454539746] [2020-09-24 22:44:39,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:39,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 22:44:39,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346438462] [2020-09-24 22:44:39,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 22:44:39,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:39,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 22:44:39,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-24 22:44:39,689 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 28 states. [2020-09-24 22:44:40,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:40,545 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2020-09-24 22:44:40,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-24 22:44:40,546 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 159 [2020-09-24 22:44:40,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:40,547 INFO L225 Difference]: With dead ends: 212 [2020-09-24 22:44:40,547 INFO L226 Difference]: Without dead ends: 182 [2020-09-24 22:44:40,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-24 22:44:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-24 22:44:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 174. [2020-09-24 22:44:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-24 22:44:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2020-09-24 22:44:40,555 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2020-09-24 22:44:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:40,555 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2020-09-24 22:44:40,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 22:44:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2020-09-24 22:44:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-24 22:44:40,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:40,558 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:40,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 22:44:40,558 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:40,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:40,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2141775571, now seen corresponding path program 13 times [2020-09-24 22:44:40,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:40,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151287101] [2020-09-24 22:44:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:40,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:42,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:42,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-09-24 22:44:42,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:42,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2347 [2020-09-24 22:44:42,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:42,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 22:44:42,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:42,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-09-24 22:44:42,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:43,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:43,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:43,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:43,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:43,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:43,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:43,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:43,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:43,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-09-24 22:44:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:43,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:43,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:43,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:43,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:43,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:43,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:43,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 793 backedges. 0 proven. 793 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:43,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151287101] [2020-09-24 22:44:43,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:43,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 22:44:43,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655096693] [2020-09-24 22:44:43,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 22:44:43,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:43,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 22:44:43,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-24 22:44:43,452 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 30 states. [2020-09-24 22:44:44,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:44,383 INFO L93 Difference]: Finished difference Result 222 states and 224 transitions. [2020-09-24 22:44:44,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-24 22:44:44,384 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 169 [2020-09-24 22:44:44,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:44,385 INFO L225 Difference]: With dead ends: 222 [2020-09-24 22:44:44,386 INFO L226 Difference]: Without dead ends: 192 [2020-09-24 22:44:44,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 22:44:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-09-24 22:44:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 184. [2020-09-24 22:44:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-09-24 22:44:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2020-09-24 22:44:44,394 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 169 [2020-09-24 22:44:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:44,394 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2020-09-24 22:44:44,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 22:44:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2020-09-24 22:44:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 22:44:44,396 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:44,397 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:44,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 22:44:44,397 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:44,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:44,397 INFO L82 PathProgramCache]: Analyzing trace with hash 40366649, now seen corresponding path program 14 times [2020-09-24 22:44:44,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:44,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378012516] [2020-09-24 22:44:44,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:44,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:46,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2494 [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 22:44:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:46,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-09-24 22:44:46,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:47,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:47,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:47,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:47,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:47,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:47,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:47,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:47,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:47,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:47,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 22:44:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:47,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:47,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:47,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:47,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 0 proven. 924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:47,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378012516] [2020-09-24 22:44:47,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:47,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 22:44:47,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333735177] [2020-09-24 22:44:47,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 22:44:47,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:47,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 22:44:47,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-24 22:44:47,557 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand 32 states. [2020-09-24 22:44:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:48,573 INFO L93 Difference]: Finished difference Result 232 states and 234 transitions. [2020-09-24 22:44:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-24 22:44:48,574 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 179 [2020-09-24 22:44:48,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:48,575 INFO L225 Difference]: With dead ends: 232 [2020-09-24 22:44:48,575 INFO L226 Difference]: Without dead ends: 202 [2020-09-24 22:44:48,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-24 22:44:48,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-24 22:44:48,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-09-24 22:44:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-09-24 22:44:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2020-09-24 22:44:48,587 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 179 [2020-09-24 22:44:48,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:48,587 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2020-09-24 22:44:48,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 22:44:48,587 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2020-09-24 22:44:48,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-09-24 22:44:48,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:48,590 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:48,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 22:44:48,590 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:48,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:48,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1993050593, now seen corresponding path program 15 times [2020-09-24 22:44:48,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:48,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578207153] [2020-09-24 22:44:48,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:48,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:48,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:51,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:51,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2522 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-09-24 22:44:51,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:51,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:51,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:51,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:51,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:51,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:51,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2020-09-24 22:44:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:51,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:51,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1065 backedges. 0 proven. 1065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:51,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578207153] [2020-09-24 22:44:51,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:51,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 22:44:51,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968190215] [2020-09-24 22:44:51,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 22:44:51,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:51,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 22:44:51,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 22:44:51,869 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 34 states. [2020-09-24 22:44:53,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:53,044 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2020-09-24 22:44:53,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-24 22:44:53,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 189 [2020-09-24 22:44:53,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:53,047 INFO L225 Difference]: With dead ends: 242 [2020-09-24 22:44:53,048 INFO L226 Difference]: Without dead ends: 212 [2020-09-24 22:44:53,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-24 22:44:53,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-09-24 22:44:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 204. [2020-09-24 22:44:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-24 22:44:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-09-24 22:44:53,055 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 189 [2020-09-24 22:44:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:53,056 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-09-24 22:44:53,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 22:44:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-09-24 22:44:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-24 22:44:53,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:53,059 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:53,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 22:44:53,061 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash -839789947, now seen corresponding path program 16 times [2020-09-24 22:44:53,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:53,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391504531] [2020-09-24 22:44:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:53,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:55,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:55,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-09-24 22:44:55,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2743 [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-09-24 22:44:55,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:56,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:44:56,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:56,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:56,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:44:56,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:56,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:56,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2020-09-24 22:44:56,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:56,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:44:56,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:44:56,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:44:56,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:44:56,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:44:56,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1216 backedges. 0 proven. 1216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:44:56,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391504531] [2020-09-24 22:44:56,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:44:56,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 22:44:56,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937706810] [2020-09-24 22:44:56,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 22:44:56,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:44:56,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 22:44:56,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 22:44:56,612 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 36 states. [2020-09-24 22:44:57,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:44:57,939 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2020-09-24 22:44:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-24 22:44:57,939 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 199 [2020-09-24 22:44:57,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:44:57,941 INFO L225 Difference]: With dead ends: 252 [2020-09-24 22:44:57,941 INFO L226 Difference]: Without dead ends: 222 [2020-09-24 22:44:57,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-24 22:44:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-09-24 22:44:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 214. [2020-09-24 22:44:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-09-24 22:44:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2020-09-24 22:44:57,954 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 199 [2020-09-24 22:44:57,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:44:57,955 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2020-09-24 22:44:57,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 22:44:57,955 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2020-09-24 22:44:57,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-09-24 22:44:57,956 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:44:57,957 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:44:57,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 22:44:57,957 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:44:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:44:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1916049557, now seen corresponding path program 17 times [2020-09-24 22:44:57,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:44:57,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274929037] [2020-09-24 22:44:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:44:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:44:58,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:45:00,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3005 [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 22:45:00,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:45:00,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-09-24 22:45:00,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:45:01,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:45:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:45:01,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:45:01,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:45:01,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 22:45:01,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:45:01,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 22:45:01,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:45:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:45:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:45:01,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:45:01,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:45:01,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 197 [2020-09-24 22:45:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:45:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:45:01,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:45:01,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:45:01,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:45:01,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 22:45:01,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:45:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:45:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 22:45:01,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:45:01,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 22:45:01,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1377 backedges. 0 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:45:01,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274929037] [2020-09-24 22:45:01,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 22:45:01,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 22:45:01,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094489978] [2020-09-24 22:45:01,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 22:45:01,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:45:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 22:45:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 22:45:01,937 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand 38 states. [2020-09-24 22:45:03,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:45:03,422 INFO L93 Difference]: Finished difference Result 262 states and 264 transitions. [2020-09-24 22:45:03,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-24 22:45:03,422 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 209 [2020-09-24 22:45:03,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:45:03,424 INFO L225 Difference]: With dead ends: 262 [2020-09-24 22:45:03,424 INFO L226 Difference]: Without dead ends: 232 [2020-09-24 22:45:03,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-24 22:45:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-24 22:45:03,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 224. [2020-09-24 22:45:03,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-24 22:45:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2020-09-24 22:45:03,447 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 209 [2020-09-24 22:45:03,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:45:03,448 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2020-09-24 22:45:03,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 22:45:03,448 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2020-09-24 22:45:03,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-09-24 22:45:03,449 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:45:03,449 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:45:03,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 22:45:03,450 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:45:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:45:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash 255104209, now seen corresponding path program 18 times [2020-09-24 22:45:03,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:45:03,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242523519] [2020-09-24 22:45:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:45:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:45:03,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:45:07,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:45:07,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-09-24 22:45:07,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:45:07,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3792 [2020-09-24 22:45:07,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:45:07,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 22:45:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-24 22:45:07,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-09-24 22:45:07,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0