/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 SequenceOfStatements --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:02:42,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:02:42,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:02:43,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:02:43,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:02:43,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:02:43,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:02:43,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:02:43,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:02:43,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:02:43,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:02:43,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:02:43,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:02:43,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:02:43,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:02:43,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:02:43,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:02:43,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:02:43,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:02:43,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:02:43,051 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:02:43,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:02:43,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:02:43,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:02:43,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:02:43,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:02:43,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:02:43,073 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:02:43,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:02:43,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:02:43,075 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:02:43,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:02:43,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:02:43,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:02:43,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:02:43,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:02:43,081 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:02:43,081 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:02:43,082 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:02:43,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:02:43,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:02:43,084 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 [2020-10-13 05:02:43,119 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:02:43,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:02:43,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:02:43,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:02:43,122 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:02:43,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:02:43,122 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:02:43,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:02:43,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:02:43,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:02:43,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:02:43,124 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:02:43,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:02:43,124 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:02:43,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:02:43,125 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:02:43,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:02:43,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:02:43,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:02:43,125 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:02:43,126 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:02:43,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:02:43,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:02:43,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:02:43,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:02:43,127 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:02:43,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:02:43,127 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:02:43,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:02:43,127 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 -> SequenceOfStatements 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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:02:43,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:02:43,456 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:02:43,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:02:43,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:02:43,461 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:02:43,462 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2020-10-13 05:02:43,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b95b2933e/e5d2cdefa00d42888770f141321fa3fe/FLAG39b2b56dc [2020-10-13 05:02:43,935 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:02:43,935 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs1.c [2020-10-13 05:02:43,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b95b2933e/e5d2cdefa00d42888770f141321fa3fe/FLAG39b2b56dc [2020-10-13 05:02:44,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b95b2933e/e5d2cdefa00d42888770f141321fa3fe [2020-10-13 05:02:44,376 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:02:44,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:02:44,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:44,381 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:02:44,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:02:44,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44, skipping insertion in model container [2020-10-13 05:02:44,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:02:44,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:02:44,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:44,664 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:02:44,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:02:44,815 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:02:44,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44 WrapperNode [2020-10-13 05:02:44,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:02:44,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:02:44,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:02:44,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:02:44,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,867 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (1/1) ... [2020-10-13 05:02:44,883 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:02:44,884 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:02:44,884 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:02:44,884 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:02:44,886 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (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 [2020-10-13 05:02:44,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:02:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:02:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:02:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:02:44,956 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:02:44,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:02:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:02:44,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 05:02:44,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:02:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:02:44,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:02:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:02:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:02:44,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:02:45,230 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:02:45,230 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-13 05:02:45,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:45 BoogieIcfgContainer [2020-10-13 05:02:45,235 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:02:45,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:02:45,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:02:45,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:02:45,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:02:44" (1/3) ... [2020-10-13 05:02:45,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c071796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:45, skipping insertion in model container [2020-10-13 05:02:45,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:02:44" (2/3) ... [2020-10-13 05:02:45,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c071796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:02:45, skipping insertion in model container [2020-10-13 05:02:45,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:02:45" (3/3) ... [2020-10-13 05:02:45,242 INFO L109 eAbstractionObserver]: Analyzing ICFG brs1.c [2020-10-13 05:02:45,254 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:02:45,261 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:02:45,276 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:02:45,300 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:02:45,300 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:02:45,300 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:02:45,300 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:02:45,301 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:02:45,301 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:02:45,301 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:02:45,301 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:02:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 05:02:45,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:45,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:45,329 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] [2020-10-13 05:02:45,329 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:45,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-10-13 05:02:45,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:45,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675145409] [2020-10-13 05:02:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:45,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:45,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:45,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:45,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 356 [2020-10-13 05:02:45,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:45,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:45,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 05:02:45,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 05:02:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:45,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:45,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:45,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 05:02:45,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:45,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:45,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:45,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:45,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:45,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:45,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:45,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:45,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:45,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 05:02:45,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:45,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:45,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:45,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675145409] [2020-10-13 05:02:45,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:45,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:02:45,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212481675] [2020-10-13 05:02:45,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:02:45,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:45,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:02:45,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:45,987 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 05:02:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:46,107 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-10-13 05:02:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:02:46,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-10-13 05:02:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:46,126 INFO L225 Difference]: With dead ends: 56 [2020-10-13 05:02:46,127 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 05:02:46,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:02:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 05:02:46,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 05:02:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 05:02:46,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-13 05:02:46,169 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2020-10-13 05:02:46,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:46,170 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-13 05:02:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:02:46,170 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-13 05:02:46,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 05:02:46,171 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:46,171 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] [2020-10-13 05:02:46,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:02:46,172 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:46,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:46,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-10-13 05:02:46,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:46,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832834212] [2020-10-13 05:02:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:46,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:46,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 05:02:46,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:02:46,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-13 05:02:46,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:02:46,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:46,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:46,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:46,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:46,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:46,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:46,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:46,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:46,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:46,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:46,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:46,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:46,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:46,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:46,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:46,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:02:46,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:46,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:46,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:46,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:02:46,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832834212] [2020-10-13 05:02:46,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:46,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:02:46,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309365708] [2020-10-13 05:02:46,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:46,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:46,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:46,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:46,504 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-10-13 05:02:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:46,614 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-13 05:02:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 05:02:46,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-10-13 05:02:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:46,616 INFO L225 Difference]: With dead ends: 38 [2020-10-13 05:02:46,616 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 05:02:46,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 05:02:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 05:02:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 05:02:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 05:02:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-13 05:02:46,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 21 [2020-10-13 05:02:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:46,626 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-13 05:02:46,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-13 05:02:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:46,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:46,627 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] [2020-10-13 05:02:46,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:02:46,628 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-10-13 05:02:46,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:46,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66638712] [2020-10-13 05:02:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:46,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:47,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:47,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-13 05:02:47,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:47,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 05:02:47,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:47,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 05:02:47,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:47,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:47,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:47,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:47,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:47,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:47,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:47,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:47,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:47,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:47,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:47,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:47,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:47,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66638712] [2020-10-13 05:02:47,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:47,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 05:02:47,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753799523] [2020-10-13 05:02:47,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:47,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:47,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:47,180 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-13 05:02:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:47,381 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-10-13 05:02:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:02:47,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-13 05:02:47,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:47,391 INFO L225 Difference]: With dead ends: 37 [2020-10-13 05:02:47,391 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:02:47,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:47,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:02:47,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-13 05:02:47,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:02:47,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-13 05:02:47,398 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 27 [2020-10-13 05:02:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:47,399 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-13 05:02:47,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:47,399 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-13 05:02:47,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 05:02:47,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:47,400 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] [2020-10-13 05:02:47,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:02:47,401 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:47,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:47,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-10-13 05:02:47,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:47,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472101415] [2020-10-13 05:02:47,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 05:02:47,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:02:47,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-13 05:02:47,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:02:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:02:47,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 05:02:47,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:47,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:47,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:02:47,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:47,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:47,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:47,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:47,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:47,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:47,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:47,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:47,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:47,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:47,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:47,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472101415] [2020-10-13 05:02:47,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:47,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:02:47,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11512492] [2020-10-13 05:02:47,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:02:47,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:47,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:02:47,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:02:47,717 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 4 states. [2020-10-13 05:02:47,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:47,775 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-10-13 05:02:47,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:02:47,776 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-13 05:02:47,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:47,777 INFO L225 Difference]: With dead ends: 44 [2020-10-13 05:02:47,777 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 05:02:47,778 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 [2020-10-13 05:02:47,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 05:02:47,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-13 05:02:47,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 05:02:47,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-13 05:02:47,784 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2020-10-13 05:02:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:47,785 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-13 05:02:47,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:02:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-13 05:02:47,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:02:47,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:47,786 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:02:47,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:02:47,787 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:47,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-10-13 05:02:47,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:47,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727323600] [2020-10-13 05:02:47,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:47,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:47,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:49,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 05:02:49,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:02:49,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-13 05:02:49,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:49,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 05:02:49,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:02:49,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:02:49,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:49,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:49,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:49,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:49,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:49,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:02:49,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:49,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:49,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:49,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:49,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:49,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:49,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:49,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:49,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:49,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:49,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:49,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:49,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:02:49,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727323600] [2020-10-13 05:02:49,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:49,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 05:02:49,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054045982] [2020-10-13 05:02:49,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 05:02:49,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:49,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 05:02:49,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:02:49,532 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 8 states. [2020-10-13 05:02:49,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:49,704 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-10-13 05:02:49,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 05:02:49,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-13 05:02:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:49,705 INFO L225 Difference]: With dead ends: 54 [2020-10-13 05:02:49,705 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 05:02:49,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-13 05:02:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 05:02:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 05:02:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 05:02:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-13 05:02:49,712 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2020-10-13 05:02:49,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:49,713 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-13 05:02:49,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 05:02:49,713 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-13 05:02:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 05:02:49,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:49,714 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:02:49,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:02:49,715 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:49,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:49,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-10-13 05:02:49,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:49,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762741986] [2020-10-13 05:02:49,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:49,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:49,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:50,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:51,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:51,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:52,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:52,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 05:02:52,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:02:52,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2906 [2020-10-13 05:02:52,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:52,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:02:52,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 05:02:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:02:52,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:53,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:53,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:53,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:53,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:53,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:02:53,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:53,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:53,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:53,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:53,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:53,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:53,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:53,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:53,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:53,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:02:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:02:53,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762741986] [2020-10-13 05:02:53,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:02:53,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:02:53,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132673678] [2020-10-13 05:02:53,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:02:53,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:53,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:02:53,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:02:53,224 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 16 states. [2020-10-13 05:02:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:53,932 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-10-13 05:02:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 05:02:53,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-13 05:02:53,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:53,934 INFO L225 Difference]: With dead ends: 47 [2020-10-13 05:02:53,934 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 05:02:53,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:02:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 05:02:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-13 05:02:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:02:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 05:02:53,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2020-10-13 05:02:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:53,942 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 05:02:53,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:02:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 05:02:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:02:53,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:53,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 05:02:53,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:02:53,944 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1157401232, now seen corresponding path program 3 times [2020-10-13 05:02:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:53,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063898089] [2020-10-13 05:02:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:53,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:54,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:55,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:55,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:55,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:56,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:02:57,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 05:02:57,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3418 [2020-10-13 05:02:57,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:02:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 05:02:57,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:02:57,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:02:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:02:57,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:57,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:57,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:57,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:57,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:57,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:02:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:02:57,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:02:57,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:02:57,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:02:57,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:02:57,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:02:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:02:57,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:02:57,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:02:57,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:02:57,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063898089] [2020-10-13 05:02:57,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:02:57,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 05:02:57,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040495089] [2020-10-13 05:02:57,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:02:57,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:02:57,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:02:57,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:57,421 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 5 states. [2020-10-13 05:02:57,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:02:57,483 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2020-10-13 05:02:57,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:02:57,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-13 05:02:57,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:02:57,485 INFO L225 Difference]: With dead ends: 48 [2020-10-13 05:02:57,485 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 05:02:57,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:02:57,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 05:02:57,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-13 05:02:57,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 05:02:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-13 05:02:57,491 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2020-10-13 05:02:57,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:02:57,491 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-13 05:02:57,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:02:57,491 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-13 05:02:57,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:02:57,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:02:57,492 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 05:02:57,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:02:57,493 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:02:57,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:02:57,493 INFO L82 PathProgramCache]: Analyzing trace with hash -456336654, now seen corresponding path program 4 times [2020-10-13 05:02:57,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:02:57,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365047215] [2020-10-13 05:02:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:02:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:02:57,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:57,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:58,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:02:59,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:00,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:03:01,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 05:03:01,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3593 [2020-10-13 05:03:01,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:03:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:01,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:03:01,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:01,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:01,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:01,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:01,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:01,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:01,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:01,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:01,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:01,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:01,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:01,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:01,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:01,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:01,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:01,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:01,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:01,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:01,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365047215] [2020-10-13 05:03:01,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:01,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:03:01,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654876064] [2020-10-13 05:03:01,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:03:01,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:03:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:03:01,187 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 10 states. [2020-10-13 05:03:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:01,398 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-13 05:03:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:03:01,398 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-13 05:03:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:01,399 INFO L225 Difference]: With dead ends: 61 [2020-10-13 05:03:01,399 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 05:03:01,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:03:01,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 05:03:01,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 05:03:01,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 05:03:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-13 05:03:01,411 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-13 05:03:01,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:01,412 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-13 05:03:01,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:03:01,412 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-13 05:03:01,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 05:03:01,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:01,415 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:01,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:03:01,415 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:01,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:01,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1898893800, now seen corresponding path program 5 times [2020-10-13 05:03:01,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:01,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633389326] [2020-10-13 05:03:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:01,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:01,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:03,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:04,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:05,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:06,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:06,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 05:03:06,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-13 05:03:06,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:03:06,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:03:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 05:03:06,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 05:03:06,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 05:03:06,897 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-13 05:03:07,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:07,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:07,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:07,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:07,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:03:07,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:07,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:07,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:07,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:07,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:07,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:07,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:07,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:07,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:07,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:07,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:07,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:07,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:07,324 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 05:03:07,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633389326] [2020-10-13 05:03:07,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:07,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:03:07,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197478162] [2020-10-13 05:03:07,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:03:07,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:07,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:03:07,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:07,333 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 20 states. [2020-10-13 05:03:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:08,542 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-13 05:03:08,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:03:08,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-10-13 05:03:08,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:08,544 INFO L225 Difference]: With dead ends: 49 [2020-10-13 05:03:08,544 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 05:03:08,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:03:08,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 05:03:08,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-13 05:03:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-13 05:03:08,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-13 05:03:08,554 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 39 [2020-10-13 05:03:08,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:08,555 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-13 05:03:08,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:03:08,555 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-13 05:03:08,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 05:03:08,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:08,556 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 05:03:08,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:03:08,557 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:08,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:08,557 INFO L82 PathProgramCache]: Analyzing trace with hash -63725737, now seen corresponding path program 6 times [2020-10-13 05:03:08,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:08,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381994688] [2020-10-13 05:03:08,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:08,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:08,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:08,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:09,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:11,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:12,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:13,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:03:13,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:03:13,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-13 05:03:13,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:13,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:03:13,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:03:13,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:13,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:13,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:13,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:03:13,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:13,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:13,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:13,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:13,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:13,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:13,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:13,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:13,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:13,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:13,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:13,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:13,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381994688] [2020-10-13 05:03:13,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:13,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:03:13,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963218477] [2020-10-13 05:03:13,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:03:13,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:13,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:03:13,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:03:13,801 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 12 states. [2020-10-13 05:03:14,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:14,107 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-10-13 05:03:14,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:03:14,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-13 05:03:14,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:14,110 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:03:14,110 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 05:03:14,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:03:14,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 05:03:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-13 05:03:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 05:03:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-13 05:03:14,123 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 42 [2020-10-13 05:03:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:14,124 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-13 05:03:14,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:03:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-13 05:03:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-13 05:03:14,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:14,125 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:14,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:03:14,126 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:14,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1835368963, now seen corresponding path program 7 times [2020-10-13 05:03:14,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:14,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12168831] [2020-10-13 05:03:14,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:14,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:14,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:15,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:16,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:17,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:18,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:19,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:19,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 05:03:19,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 05:03:19,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 05:03:19,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:03:19,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:03:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:03:19,646 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2020-10-13 05:03:19,778 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2020-10-13 05:03:19,953 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-13 05:03:20,127 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-13 05:03:20,287 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-13 05:03:20,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:20,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:20,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:20,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:20,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:20,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:20,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:20,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12168831] [2020-10-13 05:03:20,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:20,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:03:20,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972348554] [2020-10-13 05:03:20,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:03:20,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:03:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:03:20,745 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 25 states. [2020-10-13 05:03:21,436 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-13 05:03:22,379 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-13 05:03:22,538 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 05:03:22,951 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-13 05:03:23,231 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 05:03:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:23,495 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2020-10-13 05:03:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:03:23,496 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 45 [2020-10-13 05:03:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:23,499 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:03:23,499 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:03:23,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:03:23,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:03:23,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2020-10-13 05:03:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:03:23,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-13 05:03:23,520 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 45 [2020-10-13 05:03:23,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:23,522 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-13 05:03:23,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:03:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-13 05:03:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:03:23,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:23,526 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:03:23,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:03:23,526 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:23,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1675884206, now seen corresponding path program 8 times [2020-10-13 05:03:23,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:23,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724812595] [2020-10-13 05:03:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:23,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:23,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:23,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:24,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:25,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:27,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:03:28,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:03:28,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-13 05:03:28,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:03:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:28,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 05:03:28,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:28,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:28,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:28,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:28,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:28,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:28,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:28,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:28,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:28,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:28,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:28,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:28,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:28,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:28,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:28,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724812595] [2020-10-13 05:03:28,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:28,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:03:28,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573895279] [2020-10-13 05:03:28,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:03:28,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:28,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:03:28,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:03:28,716 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 14 states. [2020-10-13 05:03:28,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:28,975 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2020-10-13 05:03:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 05:03:28,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-13 05:03:28,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:28,977 INFO L225 Difference]: With dead ends: 85 [2020-10-13 05:03:28,977 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:03:28,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:03:28,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:03:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2020-10-13 05:03:28,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:03:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-10-13 05:03:28,986 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 48 [2020-10-13 05:03:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:28,986 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-10-13 05:03:28,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:03:28,987 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-10-13 05:03:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:03:28,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:28,987 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:28,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:03:28,988 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash -5614185, now seen corresponding path program 9 times [2020-10-13 05:03:28,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:28,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497940997] [2020-10-13 05:03:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:29,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:29,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:31,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:32,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:34,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:34,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 05:03:34,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 39 [2020-10-13 05:03:34,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:03:34,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:03:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 05:03:34,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 05:03:34,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:34,410 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-13 05:03:34,647 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2020-10-13 05:03:34,854 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-10-13 05:03:35,100 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 05:03:35,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:35,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:35,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:35,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:35,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:35,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:35,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:35,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:35,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:35,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:35,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:35,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:35,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 05:03:35,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497940997] [2020-10-13 05:03:35,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:35,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:03:35,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244476386] [2020-10-13 05:03:35,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:03:35,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:35,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:03:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:03:35,700 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 24 states. [2020-10-13 05:03:36,656 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 67 [2020-10-13 05:03:36,901 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-13 05:03:37,191 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-13 05:03:37,491 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-13 05:03:38,161 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-13 05:03:38,359 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-13 05:03:38,630 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-13 05:03:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:38,672 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-13 05:03:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:03:38,673 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-13 05:03:38,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:38,674 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:03:38,675 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 05:03:38,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 05:03:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 05:03:38,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 05:03:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 05:03:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-13 05:03:38,688 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2020-10-13 05:03:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:38,689 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-13 05:03:38,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:03:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-13 05:03:38,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 05:03:38,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:38,690 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:38,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:03:38,690 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1118753656, now seen corresponding path program 10 times [2020-10-13 05:03:38,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:38,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408457595] [2020-10-13 05:03:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:38,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:39,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:39,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:39,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:40,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:40,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:40,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:41,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:43,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:43,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 05:03:43,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:03:43,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:44,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:44,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:44,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:44,752 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:44,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408457595] [2020-10-13 05:03:44,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:44,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:03:44,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485910892] [2020-10-13 05:03:44,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:03:44,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:44,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:03:44,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:03:44,755 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 25 states. [2020-10-13 05:03:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:46,759 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-10-13 05:03:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 05:03:46,760 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-13 05:03:46,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:46,761 INFO L225 Difference]: With dead ends: 64 [2020-10-13 05:03:46,761 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:03:46,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 05:03:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:03:46,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-13 05:03:46,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-13 05:03:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-13 05:03:46,770 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 51 [2020-10-13 05:03:46,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:46,771 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-13 05:03:46,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:03:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-13 05:03:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:03:46,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:46,772 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 05:03:46,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:03:46,772 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:46,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:46,772 INFO L82 PathProgramCache]: Analyzing trace with hash 711163383, now seen corresponding path program 11 times [2020-10-13 05:03:46,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:46,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001127469] [2020-10-13 05:03:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:46,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:46,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:47,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:49,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:50,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:51,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:51,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:03:51,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 05:03:51,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:51,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:51,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:51,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:51,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:51,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:51,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:51,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:51,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:51,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:51,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:51,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:51,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:51,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:51,918 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 42 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:51,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001127469] [2020-10-13 05:03:51,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:51,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 05:03:51,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606998144] [2020-10-13 05:03:51,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 05:03:51,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:51,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 05:03:51,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 05:03:51,920 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 16 states. [2020-10-13 05:03:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:03:52,235 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-13 05:03:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 05:03:52,235 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 54 [2020-10-13 05:03:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:03:52,236 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:03:52,237 INFO L226 Difference]: Without dead ends: 62 [2020-10-13 05:03:52,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:03:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-13 05:03:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2020-10-13 05:03:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 05:03:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-10-13 05:03:52,245 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 54 [2020-10-13 05:03:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:03:52,246 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-10-13 05:03:52,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 05:03:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-10-13 05:03:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 05:03:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:03:52,247 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:03:52,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:03:52,247 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:03:52,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:03:52,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1604086883, now seen corresponding path program 12 times [2020-10-13 05:03:52,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:03:52,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532936315] [2020-10-13 05:03:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:03:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:52,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:52,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:54,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:55,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:56,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:57,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:57,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:03:57,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:57,710 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-13 05:03:57,858 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-13 05:03:58,024 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-13 05:03:58,209 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-13 05:03:58,415 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-13 05:03:59,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:03:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:59,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:59,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:59,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:59,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:59,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:03:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:03:59,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:03:59,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:03:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:03:59,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532936315] [2020-10-13 05:03:59,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:03:59,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:03:59,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121937365] [2020-10-13 05:03:59,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:03:59,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:03:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:03:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:03:59,743 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 33 states. [2020-10-13 05:04:01,150 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 53 [2020-10-13 05:04:01,387 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-10-13 05:04:01,726 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 73 [2020-10-13 05:04:02,699 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 50 [2020-10-13 05:04:02,932 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-13 05:04:03,137 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-13 05:04:03,345 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-13 05:04:03,530 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-13 05:04:03,708 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-10-13 05:04:03,886 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 05:04:04,677 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2020-10-13 05:04:05,131 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 76 [2020-10-13 05:04:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:05,611 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2020-10-13 05:04:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 05:04:05,611 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 57 [2020-10-13 05:04:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:05,613 INFO L225 Difference]: With dead ends: 94 [2020-10-13 05:04:05,613 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 05:04:05,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=677, Invalid=4015, Unknown=0, NotChecked=0, Total=4692 [2020-10-13 05:04:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 05:04:05,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2020-10-13 05:04:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:04:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-13 05:04:05,624 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2020-10-13 05:04:05,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:05,624 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-13 05:04:05,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:04:05,624 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-13 05:04:05,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:04:05,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:05,625 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-13 05:04:05,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:04:05,626 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:05,626 INFO L82 PathProgramCache]: Analyzing trace with hash -678981710, now seen corresponding path program 13 times [2020-10-13 05:04:05,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:05,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135839427] [2020-10-13 05:04:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:05,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:05,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:06,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:08,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:09,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:10,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:04:10,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 05:04:10,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:04:10,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:04:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:10,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 05:04:10,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:10,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:10,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:10,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:10,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:10,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:04:10,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:10,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:10,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:10,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:10,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:10,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:10,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:10,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:10,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:10,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:10,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:10,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:10,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:10,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:10,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135839427] [2020-10-13 05:04:10,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:10,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:04:10,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563266657] [2020-10-13 05:04:10,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:04:10,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:10,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:04:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:04:10,867 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 18 states. [2020-10-13 05:04:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:11,299 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2020-10-13 05:04:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:04:11,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-13 05:04:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:11,301 INFO L225 Difference]: With dead ends: 103 [2020-10-13 05:04:11,302 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:04:11,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:04:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:04:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-10-13 05:04:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 05:04:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-13 05:04:11,309 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2020-10-13 05:04:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:11,309 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-13 05:04:11,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:04:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-13 05:04:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:04:11,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:11,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:11,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:04:11,311 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:11,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:11,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1950012471, now seen corresponding path program 14 times [2020-10-13 05:04:11,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:11,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836867960] [2020-10-13 05:04:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:11,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:11,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:11,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:11,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:11,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:12,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:16,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:16,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:16,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:04:16,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:04:16,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5108 [2020-10-13 05:04:16,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:16,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 05:04:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:16,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 05:04:16,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:16,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:16,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:16,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:16,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:16,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:16,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:16,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:16,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:16,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:16,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:16,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:16,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:16,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:16,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:16,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836867960] [2020-10-13 05:04:16,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:16,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 05:04:16,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67583525] [2020-10-13 05:04:16,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 05:04:16,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:16,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 05:04:16,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:04:16,607 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 18 states. [2020-10-13 05:04:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:17,187 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-13 05:04:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 05:04:17,190 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 60 [2020-10-13 05:04:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:17,191 INFO L225 Difference]: With dead ends: 70 [2020-10-13 05:04:17,191 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 05:04:17,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:04:17,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 05:04:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 05:04:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 05:04:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-10-13 05:04:17,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2020-10-13 05:04:17,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:17,203 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-10-13 05:04:17,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 05:04:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-10-13 05:04:17,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 05:04:17,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:17,204 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:17,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:04:17,204 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:17,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash -38907688, now seen corresponding path program 15 times [2020-10-13 05:04:17,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:17,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973521212] [2020-10-13 05:04:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:18,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:18,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:21,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:21,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:21,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:21,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:22,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:22,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 05:04:22,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 05:04:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:04:22,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 05:04:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:22,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 05:04:22,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:24,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:24,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:24,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:24,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:24,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:24,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:24,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:24,126 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:24,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973521212] [2020-10-13 05:04:24,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:24,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 05:04:24,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759678552] [2020-10-13 05:04:24,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 05:04:24,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:24,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 05:04:24,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 05:04:24,128 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 33 states. [2020-10-13 05:04:27,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:27,095 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-10-13 05:04:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 05:04:27,096 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 63 [2020-10-13 05:04:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:27,097 INFO L225 Difference]: With dead ends: 76 [2020-10-13 05:04:27,097 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 05:04:27,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 05:04:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 05:04:27,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-13 05:04:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 05:04:27,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-13 05:04:27,107 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 63 [2020-10-13 05:04:27,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:27,108 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-13 05:04:27,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 05:04:27,108 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-13 05:04:27,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 05:04:27,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:27,109 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 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] [2020-10-13 05:04:27,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:04:27,109 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:27,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:27,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1409451159, now seen corresponding path program 16 times [2020-10-13 05:04:27,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:27,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655626554] [2020-10-13 05:04:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:27,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:27,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:27,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:28,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:29,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:30,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:31,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 05:04:32,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:32,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 05:04:32,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:32,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:32,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:32,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:32,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:32,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:04:32,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:32,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:32,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:32,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:32,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:32,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:32,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:32,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:32,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:32,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:32,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:04:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 79 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:32,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655626554] [2020-10-13 05:04:32,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:32,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 05:04:32,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115500289] [2020-10-13 05:04:32,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 05:04:32,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 05:04:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 05:04:32,375 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 20 states. [2020-10-13 05:04:32,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:32,984 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2020-10-13 05:04:32,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:04:32,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2020-10-13 05:04:32,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:32,986 INFO L225 Difference]: With dead ends: 106 [2020-10-13 05:04:32,986 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 05:04:32,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 05:04:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 05:04:33,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-13 05:04:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 05:04:33,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-13 05:04:33,015 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 66 [2020-10-13 05:04:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:33,016 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-13 05:04:33,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 05:04:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-13 05:04:33,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 05:04:33,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:33,017 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:33,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 05:04:33,018 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:33,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:33,018 INFO L82 PathProgramCache]: Analyzing trace with hash 847335741, now seen corresponding path program 17 times [2020-10-13 05:04:33,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:33,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923387977] [2020-10-13 05:04:33,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:33,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:34,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:34,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:35,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:36,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:37,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5076 [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:04:38,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:38,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:04:38,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:39,667 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-13 05:04:39,823 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 58 [2020-10-13 05:04:40,002 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-13 05:04:40,173 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 05:04:40,344 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-13 05:04:41,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:41,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:41,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:41,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:41,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:41,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:41,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 5 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:41,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923387977] [2020-10-13 05:04:41,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:41,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:04:41,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853057303] [2020-10-13 05:04:41,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:04:41,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:04:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:04:41,656 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 41 states. [2020-10-13 05:04:43,764 WARN L193 SmtUtils]: Spent 537.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 149 [2020-10-13 05:04:44,202 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 57 [2020-10-13 05:04:44,416 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 57 [2020-10-13 05:04:44,688 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 58 [2020-10-13 05:04:45,213 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 106 [2020-10-13 05:04:45,600 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 105 [2020-10-13 05:04:45,953 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 115 [2020-10-13 05:04:46,252 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 110 [2020-10-13 05:04:46,588 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2020-10-13 05:04:46,946 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 118 [2020-10-13 05:04:47,305 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 116 [2020-10-13 05:04:47,653 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 102 [2020-10-13 05:04:48,081 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2020-10-13 05:04:48,525 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 131 [2020-10-13 05:04:48,937 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 116 [2020-10-13 05:04:49,429 WARN L193 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 138 [2020-10-13 05:04:49,931 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 139 [2020-10-13 05:04:50,393 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 123 [2020-10-13 05:04:50,922 WARN L193 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 144 [2020-10-13 05:04:51,591 WARN L193 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 133 [2020-10-13 05:04:52,050 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 122 [2020-10-13 05:04:52,610 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 143 [2020-10-13 05:04:53,257 WARN L193 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 147 [2020-10-13 05:04:53,909 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 150 [2020-10-13 05:04:54,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:04:54,130 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2020-10-13 05:04:54,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 05:04:54,131 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 69 [2020-10-13 05:04:54,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:04:54,132 INFO L225 Difference]: With dead ends: 107 [2020-10-13 05:04:54,132 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 05:04:54,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=763, Invalid=5879, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 05:04:54,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 05:04:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-10-13 05:04:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-13 05:04:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-13 05:04:54,145 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2020-10-13 05:04:54,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:04:54,145 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-13 05:04:54,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:04:54,145 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-13 05:04:54,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 05:04:54,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:04:54,146 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:04:54,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 05:04:54,147 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:04:54,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:04:54,147 INFO L82 PathProgramCache]: Analyzing trace with hash 944405207, now seen corresponding path program 18 times [2020-10-13 05:04:54,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:04:54,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159506266] [2020-10-13 05:04:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:04:54,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:54,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:54,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:55,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:56,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:56,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:56,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:57,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:58,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:58,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:58,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 05:04:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:04:59,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:04:59,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:59,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:04:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:59,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:59,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:59,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:04:59,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:59,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:04:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:04:59,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:04:59,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:04:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:04:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:04:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:04:59,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:04:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:04:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:04:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:04:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:04:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:04:59,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159506266] [2020-10-13 05:04:59,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:04:59,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:04:59,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926072537] [2020-10-13 05:04:59,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:04:59,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:04:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:04:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:04:59,507 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 22 states. [2020-10-13 05:05:00,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:00,377 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-13 05:05:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 05:05:00,380 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 72 [2020-10-13 05:05:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:00,380 INFO L225 Difference]: With dead ends: 82 [2020-10-13 05:05:00,381 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 05:05:00,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1261, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:05:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 05:05:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 05:05:00,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 05:05:00,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-10-13 05:05:00,389 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2020-10-13 05:05:00,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:00,389 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-10-13 05:05:00,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:05:00,389 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-10-13 05:05:00,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 05:05:00,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:00,390 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:00,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 05:05:00,390 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:00,391 INFO L82 PathProgramCache]: Analyzing trace with hash -688019912, now seen corresponding path program 19 times [2020-10-13 05:05:00,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:00,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72903407] [2020-10-13 05:05:00,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:00,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:01,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:02,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:03,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:04,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5130 [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:05:05,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:05:05,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:05:05,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:08,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:08,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:08,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:08,238 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:08,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:05:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:08,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:08,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:08,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:08,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:05:08,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72903407] [2020-10-13 05:05:08,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:08,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 05:05:08,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911578925] [2020-10-13 05:05:08,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 05:05:08,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 05:05:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 05:05:08,286 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 41 states. [2020-10-13 05:05:10,090 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 57 [2020-10-13 05:05:10,291 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 60 [2020-10-13 05:05:10,475 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-13 05:05:10,694 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-13 05:05:10,880 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2020-10-13 05:05:11,110 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 57 [2020-10-13 05:05:11,327 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-13 05:05:11,704 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 58 [2020-10-13 05:05:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:13,564 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-10-13 05:05:13,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 05:05:13,564 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 75 [2020-10-13 05:05:13,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:13,565 INFO L225 Difference]: With dead ends: 88 [2020-10-13 05:05:13,565 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 05:05:13,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=448, Invalid=3584, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:05:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 05:05:13,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-13 05:05:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-13 05:05:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-13 05:05:13,575 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 75 [2020-10-13 05:05:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:13,576 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-13 05:05:13,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 05:05:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-13 05:05:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 05:05:13,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:13,576 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 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] [2020-10-13 05:05:13,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 05:05:13,577 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:13,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash -350047433, now seen corresponding path program 20 times [2020-10-13 05:05:13,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:13,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769897379] [2020-10-13 05:05:13,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:13,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:13,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:14,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:15,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:16,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:16,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:16,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:17,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:18,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:18,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:18,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5169 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 05:05:18,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:19,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:19,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:19,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:19,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:19,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:19,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:19,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:19,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:19,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:19,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:05:19,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:05:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:19,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:19,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:05:19,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:19,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:19,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:19,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:19,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:05:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:05:19,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769897379] [2020-10-13 05:05:19,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:19,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 05:05:19,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833937146] [2020-10-13 05:05:19,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 05:05:19,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:19,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 05:05:19,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:05:19,178 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 24 states. [2020-10-13 05:05:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:19,848 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-10-13 05:05:19,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 05:05:19,849 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 78 [2020-10-13 05:05:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:19,850 INFO L225 Difference]: With dead ends: 124 [2020-10-13 05:05:19,850 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 05:05:19,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 05:05:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 05:05:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2020-10-13 05:05:19,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 05:05:19,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2020-10-13 05:05:19,865 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 78 [2020-10-13 05:05:19,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:19,865 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2020-10-13 05:05:19,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 05:05:19,866 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2020-10-13 05:05:19,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 05:05:19,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:19,866 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:05:19,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 05:05:19,867 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:19,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash 247838429, now seen corresponding path program 21 times [2020-10-13 05:05:19,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:19,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745168017] [2020-10-13 05:05:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:19,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:20,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:20,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:21,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:23,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:24,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:24,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 05:05:24,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 05:05:24,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 05:05:24,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-13 05:05:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:05:24,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 05:05:24,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:27,095 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 50 [2020-10-13 05:05:27,366 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 55 [2020-10-13 05:05:27,646 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 56 [2020-10-13 05:05:27,908 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 57 [2020-10-13 05:05:28,085 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 51 [2020-10-13 05:05:28,292 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-13 05:05:28,565 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 72 [2020-10-13 05:05:28,870 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-13 05:05:29,096 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-13 05:05:29,325 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-13 05:05:29,523 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-13 05:05:29,798 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-13 05:05:32,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:05:32,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:32,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:32,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:32,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:32,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:05:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:32,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:05:32,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:05:32,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:05:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 64 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:05:32,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745168017] [2020-10-13 05:05:32,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:05:32,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-13 05:05:32,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819325890] [2020-10-13 05:05:32,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-13 05:05:32,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:05:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-13 05:05:32,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2020-10-13 05:05:32,151 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand 49 states. [2020-10-13 05:05:33,020 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-13 05:05:33,251 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-13 05:05:33,597 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-13 05:05:33,828 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:05:34,213 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-13 05:05:34,455 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:05:34,859 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-13 05:05:35,115 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:05:35,530 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-13 05:05:35,818 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-13 05:05:36,268 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-13 05:05:36,548 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 05:05:36,973 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-13 05:05:37,261 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-13 05:05:37,517 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 05:05:38,932 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 203 DAG size of output: 157 [2020-10-13 05:05:39,206 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 53 [2020-10-13 05:05:39,624 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 64 [2020-10-13 05:05:40,021 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 64 [2020-10-13 05:05:40,972 WARN L193 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 116 [2020-10-13 05:05:41,943 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 116 [2020-10-13 05:05:42,829 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 110 [2020-10-13 05:05:43,436 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 63 [2020-10-13 05:05:43,991 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 64 [2020-10-13 05:05:44,666 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2020-10-13 05:05:45,216 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 63 [2020-10-13 05:05:45,723 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 64 [2020-10-13 05:05:46,307 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 88 [2020-10-13 05:05:46,874 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 70 [2020-10-13 05:05:47,411 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 71 [2020-10-13 05:05:47,939 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 83 [2020-10-13 05:05:48,422 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2020-10-13 05:05:48,875 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 66 [2020-10-13 05:05:49,336 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 76 [2020-10-13 05:05:49,894 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-13 05:05:50,387 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 72 [2020-10-13 05:05:50,743 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-10-13 05:05:51,140 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 73 [2020-10-13 05:05:51,472 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-13 05:05:51,729 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-13 05:05:52,047 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 60 [2020-10-13 05:05:52,286 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-13 05:05:52,559 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 61 [2020-10-13 05:05:52,844 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-13 05:05:54,313 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 204 DAG size of output: 129 [2020-10-13 05:05:54,566 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2020-10-13 05:05:56,035 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 206 DAG size of output: 131 [2020-10-13 05:05:56,377 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-13 05:05:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:05:56,592 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-10-13 05:05:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-13 05:05:56,593 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 81 [2020-10-13 05:05:56,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:05:56,593 INFO L225 Difference]: With dead ends: 91 [2020-10-13 05:05:56,594 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 05:05:56,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=1507, Invalid=10049, Unknown=0, NotChecked=0, Total=11556 [2020-10-13 05:05:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 05:05:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-13 05:05:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-13 05:05:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-13 05:05:56,607 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2020-10-13 05:05:56,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:05:56,608 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-13 05:05:56,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-13 05:05:56,608 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-13 05:05:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 05:05:56,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:05:56,609 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2020-10-13 05:05:56,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 05:05:56,609 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:05:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:05:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1173070962, now seen corresponding path program 22 times [2020-10-13 05:05:56,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:05:56,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286058841] [2020-10-13 05:05:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:05:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:05:56,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:56,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:57,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:58,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:58,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:05:58,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:01,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:01,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 05:06:01,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:02,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:02,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:02,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:02,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:02,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:02,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:02,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:02,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:02,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:02,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:02,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286058841] [2020-10-13 05:06:02,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:02,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:06:02,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800702233] [2020-10-13 05:06:02,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:06:02,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:06:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:06:02,039 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 26 states. [2020-10-13 05:06:02,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:06:02,741 INFO L93 Difference]: Finished difference Result 133 states and 135 transitions. [2020-10-13 05:06:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 05:06:02,742 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2020-10-13 05:06:02,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:06:02,743 INFO L225 Difference]: With dead ends: 133 [2020-10-13 05:06:02,743 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 05:06:02,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=1078, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:06:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 05:06:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2020-10-13 05:06:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 05:06:02,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-10-13 05:06:02,757 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2020-10-13 05:06:02,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:06:02,757 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-10-13 05:06:02,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:06:02,758 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-10-13 05:06:02,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 05:06:02,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:06:02,759 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:06:02,759 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 05:06:02,759 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:06:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:06:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -481635432, now seen corresponding path program 23 times [2020-10-13 05:06:02,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:06:02,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626792483] [2020-10-13 05:06:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:06:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:02,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:03,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:03,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:05,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:06,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:07,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:08,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5270 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 05:06:08,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:08,605 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 28 [2020-10-13 05:06:09,336 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 05:06:09,480 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-13 05:06:09,652 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-13 05:06:09,829 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 05:06:10,023 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-13 05:06:10,205 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-13 05:06:10,419 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-13 05:06:10,623 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 71 [2020-10-13 05:06:10,863 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-13 05:06:11,191 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 87 [2020-10-13 05:06:11,482 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88 [2020-10-13 05:06:11,802 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-10-13 05:06:12,022 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 74 [2020-10-13 05:06:12,263 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-13 05:06:12,554 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 87 [2020-10-13 05:06:12,803 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 78 [2020-10-13 05:06:13,079 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 91 [2020-10-13 05:06:13,403 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-10-13 05:06:13,658 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-13 05:06:13,975 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-13 05:06:14,224 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-10-13 05:06:14,605 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-13 05:06:14,827 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-10-13 05:06:15,113 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-13 05:06:15,336 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2020-10-13 05:06:15,609 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-13 05:06:15,815 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-13 05:06:16,078 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-13 05:06:16,281 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-13 05:06:16,531 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-13 05:06:17,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:06:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:17,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:17,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:06:17,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:17,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:06:17,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:17,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:17,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 05:06:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:06:17,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:06:17,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:06:17,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:06:17,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:06:17,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:06:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 1 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:06:17,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626792483] [2020-10-13 05:06:17,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:06:17,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 05:06:17,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010988925] [2020-10-13 05:06:17,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 05:06:17,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:06:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 05:06:17,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 05:06:17,794 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 53 states. [2020-10-13 05:06:19,179 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-13 05:06:20,273 WARN L193 SmtUtils]: Spent 901.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 121 [2020-10-13 05:06:21,330 WARN L193 SmtUtils]: Spent 829.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 119 [2020-10-13 05:06:22,060 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-13 05:06:23,338 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 150 DAG size of output: 124 [2020-10-13 05:06:24,253 WARN L193 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 119 [2020-10-13 05:06:24,998 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-13 05:06:25,944 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-13 05:06:26,918 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 81