/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-examples/sanfoundry_27_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:41:56,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:41:56,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:41:56,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:41:56,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:41:56,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:41:56,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:41:56,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:41:56,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:41:56,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:41:56,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:41:56,928 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:41:56,928 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:41:56,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:41:56,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:41:56,935 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:41:56,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:41:56,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:41:56,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:41:56,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:41:56,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:41:56,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:41:56,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:41:56,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:41:56,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:41:56,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:41:56,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:41:56,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:41:56,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:41:56,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:41:56,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:41:56,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:41:56,980 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:41:56,980 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:41:56,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:41:56,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:41:56,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:41:56,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:41:56,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:41:56,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:41:56,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:41:56,991 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 04:41:57,028 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:41:57,028 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:41:57,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:41:57,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:41:57,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:41:57,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:41:57,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:41:57,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:41:57,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:41:57,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:41:57,033 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:41:57,033 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:41:57,033 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:41:57,033 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:41:57,034 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:41:57,034 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:41:57,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:41:57,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:41:57,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:41:57,035 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:41:57,035 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:41:57,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:41:57,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:41:57,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:41:57,036 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:41:57,036 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:41:57,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:41:57,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:41:57,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:41:57,037 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 04:41:57,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:41:57,355 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:41:57,360 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:41:57,361 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:41:57,362 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:41:57,362 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-13 04:41:57,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9ea8281/ecb4c65fb52f478d8e616bd52748fe0b/FLAGd67de7203 [2020-10-13 04:41:57,885 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:41:57,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_27_ground.i [2020-10-13 04:41:57,890 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9ea8281/ecb4c65fb52f478d8e616bd52748fe0b/FLAGd67de7203 [2020-10-13 04:41:58,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9ea8281/ecb4c65fb52f478d8e616bd52748fe0b [2020-10-13 04:41:58,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:41:58,266 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:41:58,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:41:58,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:41:58,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:41:58,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373efb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58, skipping insertion in model container [2020-10-13 04:41:58,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,282 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:41:58,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:41:58,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:41:58,493 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:41:58,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:41:58,547 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:41:58,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58 WrapperNode [2020-10-13 04:41:58,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:41:58,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:41:58,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:41:58,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:41:58,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,677 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (1/1) ... [2020-10-13 04:41:58,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:41:58,719 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:41:58,719 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:41:58,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:41:58,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (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 04:41:58,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:41:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:41:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:41:58,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:41:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:41:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:41:58,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:41:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:41:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:41:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:41:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:41:58,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:41:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:41:58,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:41:59,120 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:41:59,121 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-13 04:41:59,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:41:59 BoogieIcfgContainer [2020-10-13 04:41:59,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:41:59,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:41:59,127 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:41:59,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:41:59,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:41:58" (1/3) ... [2020-10-13 04:41:59,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a1d08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:41:59, skipping insertion in model container [2020-10-13 04:41:59,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:41:58" (2/3) ... [2020-10-13 04:41:59,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16a1d08d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:41:59, skipping insertion in model container [2020-10-13 04:41:59,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:41:59" (3/3) ... [2020-10-13 04:41:59,134 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_27_ground.i [2020-10-13 04:41:59,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:41:59,155 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:41:59,171 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:41:59,198 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:41:59,198 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:41:59,198 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:41:59,198 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:41:59,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:41:59,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:41:59,199 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:41:59,199 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:41:59,220 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-13 04:41:59,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:41:59,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:59,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:59,234 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:59,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:59,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1998025284, now seen corresponding path program 1 times [2020-10-13 04:41:59,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:59,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102076600] [2020-10-13 04:41:59,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:59,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:59,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:41:59,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:41:59,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 352 [2020-10-13 04:41:59,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:59,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:59,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:59,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:41:59,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:59,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:59,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:59,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 04:41:59,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:59,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:41:59,888 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 04:41:59,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102076600] [2020-10-13 04:41:59,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:41:59,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:41:59,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222163418] [2020-10-13 04:41:59,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:41:59,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:59,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:41:59,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:41:59,914 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2020-10-13 04:42:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:00,003 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-13 04:42:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:42:00,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-13 04:42:00,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:00,014 INFO L225 Difference]: With dead ends: 48 [2020-10-13 04:42:00,015 INFO L226 Difference]: Without dead ends: 23 [2020-10-13 04:42:00,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:42:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-13 04:42:00,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-13 04:42:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-13 04:42:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-13 04:42:00,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-10-13 04:42:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:00,056 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-13 04:42:00,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:42:00,056 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-13 04:42:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-13 04:42:00,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:00,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:42:00,058 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash -915838997, now seen corresponding path program 1 times [2020-10-13 04:42:00,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708754205] [2020-10-13 04:42:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 04:42:00,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:00,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-13 04:42:00,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:00,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:00,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:00,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:00,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:00,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:42:00,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:00,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:00,326 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 04:42:00,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708754205] [2020-10-13 04:42:00,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:00,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:00,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651154432] [2020-10-13 04:42:00,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:00,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:00,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:00,330 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2020-10-13 04:42:00,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:00,409 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-10-13 04:42:00,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:00,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-13 04:42:00,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:00,411 INFO L225 Difference]: With dead ends: 40 [2020-10-13 04:42:00,411 INFO L226 Difference]: Without dead ends: 25 [2020-10-13 04:42:00,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:00,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-13 04:42:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-13 04:42:00,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:42:00,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 04:42:00,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2020-10-13 04:42:00,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:00,421 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 04:42:00,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:00,421 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 04:42:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:42:00,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:00,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:42:00,425 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,426 INFO L82 PathProgramCache]: Analyzing trace with hash 203688137, now seen corresponding path program 1 times [2020-10-13 04:42:00,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837831210] [2020-10-13 04:42:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:42:00,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:00,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-13 04:42:00,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:42:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:42:00,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:42:00,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:00,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:00,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:00,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:00,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:00,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:00,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:00,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:00,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837831210] [2020-10-13 04:42:00,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:42:00,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:42:00,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481314836] [2020-10-13 04:42:00,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:42:00,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:00,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:42:00,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:00,788 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 04:42:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:00,859 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-10-13 04:42:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:42:00,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:42:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:00,860 INFO L225 Difference]: With dead ends: 39 [2020-10-13 04:42:00,861 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:42:00,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:42:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:42:00,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-13 04:42:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-13 04:42:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-13 04:42:00,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-13 04:42:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:00,868 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-13 04:42:00,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:42:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-13 04:42:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 04:42:00,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,869 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] [2020-10-13 04:42:00,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:42:00,870 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -990062782, now seen corresponding path program 1 times [2020-10-13 04:42:00,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135842163] [2020-10-13 04:42:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 04:42:01,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:01,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 277 [2020-10-13 04:42:01,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:01,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:01,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:42:01,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:01,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:01,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:42:01,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135842163] [2020-10-13 04:42:01,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:01,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:01,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546306546] [2020-10-13 04:42:01,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:01,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:01,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:01,204 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 5 states. [2020-10-13 04:42:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:01,302 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-13 04:42:01,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:01,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 04:42:01,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:01,304 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:42:01,304 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:42:01,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:01,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:42:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-13 04:42:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:42:01,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 04:42:01,311 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 20 [2020-10-13 04:42:01,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:01,311 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 04:42:01,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 04:42:01,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:42:01,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:01,313 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] [2020-10-13 04:42:01,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:42:01,314 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1464200924, now seen corresponding path program 2 times [2020-10-13 04:42:01,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:01,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005861989] [2020-10-13 04:42:01,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:42:01,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:01,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-13 04:42:01,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:42:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:42:01,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:42:01,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:01,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:01,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:01,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:01,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:01,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:01,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:01,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:01,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:42:01,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005861989] [2020-10-13 04:42:01,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:01,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:42:01,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321355408] [2020-10-13 04:42:01,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:42:01,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:01,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:42:01,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:01,848 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 04:42:01,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:01,983 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-13 04:42:01,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:42:01,984 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:42:01,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:01,985 INFO L225 Difference]: With dead ends: 44 [2020-10-13 04:42:01,986 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 04:42:01,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:42:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 04:42:01,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-13 04:42:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 04:42:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 04:42:02,003 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-10-13 04:42:02,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:02,004 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 04:42:02,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:42:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 04:42:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-13 04:42:02,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:02,008 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] [2020-10-13 04:42:02,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:42:02,008 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:02,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:02,009 INFO L82 PathProgramCache]: Analyzing trace with hash -596431609, now seen corresponding path program 3 times [2020-10-13 04:42:02,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:02,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666859630] [2020-10-13 04:42:02,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 04:42:02,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 828 [2020-10-13 04:42:02,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:02,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:42:02,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:02,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:02,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:02,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:02,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:02,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:02,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:42:02,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:02,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:02,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:02,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:02,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:42:02,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666859630] [2020-10-13 04:42:02,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:02,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:02,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574519151] [2020-10-13 04:42:02,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:02,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:02,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:02,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:02,912 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 04:42:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:03,001 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-10-13 04:42:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:03,002 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-13 04:42:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:03,003 INFO L225 Difference]: With dead ends: 54 [2020-10-13 04:42:03,003 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:42:03,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:42:03,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 04:42:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:42:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:42:03,009 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2020-10-13 04:42:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:03,009 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:42:03,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:42:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:42:03,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:03,011 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:03,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:42:03,011 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1934045083, now seen corresponding path program 4 times [2020-10-13 04:42:03,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:03,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596641393] [2020-10-13 04:42:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:03,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:42:03,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:03,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-10-13 04:42:03,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:42:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:42:03,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:03,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:03,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:03,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:03,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:03,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:03,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:03,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:03,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:03,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:03,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:03,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:42:03,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596641393] [2020-10-13 04:42:03,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:03,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:42:03,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772257791] [2020-10-13 04:42:03,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:42:03,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:03,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:42:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:03,933 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-13 04:42:04,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:04,051 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-13 04:42:04,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:42:04,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:42:04,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:04,053 INFO L225 Difference]: With dead ends: 49 [2020-10-13 04:42:04,053 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:42:04,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:42:04,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:42:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-10-13 04:42:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 04:42:04,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-13 04:42:04,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 27 [2020-10-13 04:42:04,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:04,060 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-13 04:42:04,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:42:04,060 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-13 04:42:04,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:42:04,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:04,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:04,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:42:04,062 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash -425354714, now seen corresponding path program 5 times [2020-10-13 04:42:04,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:04,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813406295] [2020-10-13 04:42:04,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:04,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:04,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:04,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:42:05,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:05,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1237 [2020-10-13 04:42:05,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:42:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:05,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:42:05,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:05,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:05,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:05,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:05,374 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:05,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813406295] [2020-10-13 04:42:05,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:05,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:42:05,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726492095] [2020-10-13 04:42:05,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:42:05,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:05,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:42:05,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:05,377 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 7 states. [2020-10-13 04:42:05,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:05,500 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-13 04:42:05,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:42:05,500 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-10-13 04:42:05,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:05,501 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:42:05,501 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:42:05,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:42:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:42:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-13 04:42:05,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:42:05,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-13 04:42:05,507 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 30 [2020-10-13 04:42:05,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:05,508 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-13 04:42:05,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:42:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-13 04:42:05,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:42:05,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:05,509 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:05,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:42:05,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1607819656, now seen corresponding path program 6 times [2020-10-13 04:42:05,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:05,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393265630] [2020-10-13 04:42:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:05,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:42:07,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:07,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1698 [2020-10-13 04:42:07,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:42:07,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:42:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:07,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:07,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:07,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:07,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:42:07,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:07,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:07,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:42:07,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393265630] [2020-10-13 04:42:07,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:42:07,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990145887] [2020-10-13 04:42:07,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:42:07,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:42:07,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:07,307 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2020-10-13 04:42:07,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:07,439 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-13 04:42:07,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:42:07,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 04:42:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:07,440 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:42:07,441 INFO L226 Difference]: Without dead ends: 45 [2020-10-13 04:42:07,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:42:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-13 04:42:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-13 04:42:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:42:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-13 04:42:07,450 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2020-10-13 04:42:07,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:07,451 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-13 04:42:07,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:42:07,451 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-13 04:42:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:42:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:07,453 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:07,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:42:07,453 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1473435649, now seen corresponding path program 7 times [2020-10-13 04:42:07,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:07,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990564903] [2020-10-13 04:42:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:07,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:07,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:09,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:09,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:42:09,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2533 [2020-10-13 04:42:09,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:42:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:10,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:42:10,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:10,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:10,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:10,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:10,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:10,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:10,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:10,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:10,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:42:10,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990564903] [2020-10-13 04:42:10,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:10,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:42:10,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737430914] [2020-10-13 04:42:10,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:42:10,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:10,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:42:10,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:10,084 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 9 states. [2020-10-13 04:42:10,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:10,221 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-10-13 04:42:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:42:10,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-13 04:42:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:10,223 INFO L225 Difference]: With dead ends: 75 [2020-10-13 04:42:10,223 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:42:10,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:42:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:42:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-13 04:42:10,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:42:10,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-13 04:42:10,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-13 04:42:10,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:10,229 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-13 04:42:10,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:42:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-13 04:42:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:42:10,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:10,231 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:10,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:42:10,231 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:10,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:10,231 INFO L82 PathProgramCache]: Analyzing trace with hash -508522004, now seen corresponding path program 8 times [2020-10-13 04:42:10,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:10,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890910163] [2020-10-13 04:42:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:10,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:10,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:13,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:42:13,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:13,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3052 [2020-10-13 04:42:13,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:13,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:42:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:13,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:42:13,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:13,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:13,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:13,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:13,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:13,415 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:42:13,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890910163] [2020-10-13 04:42:13,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:13,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:42:13,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409706307] [2020-10-13 04:42:13,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:42:13,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:13,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:42:13,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:13,420 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 10 states. [2020-10-13 04:42:13,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:13,584 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-13 04:42:13,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:42:13,584 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 04:42:13,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:13,585 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:42:13,585 INFO L226 Difference]: Without dead ends: 55 [2020-10-13 04:42:13,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:42:13,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-13 04:42:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-13 04:42:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:42:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-13 04:42:13,598 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2020-10-13 04:42:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:13,599 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-13 04:42:13,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:42:13,599 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-13 04:42:13,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:42:13,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:13,602 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:13,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:42:13,603 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:13,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:13,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1836589155, now seen corresponding path program 9 times [2020-10-13 04:42:13,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:13,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020721970] [2020-10-13 04:42:13,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:13,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:18,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:42:18,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4968 [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:42:18,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:18,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:18,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:18,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:18,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:18,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:18,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:18,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:42:18,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020721970] [2020-10-13 04:42:18,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:18,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:42:18,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352670830] [2020-10-13 04:42:18,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:42:18,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:18,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:42:18,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:18,687 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 11 states. [2020-10-13 04:42:18,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:18,860 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-10-13 04:42:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:42:18,861 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-13 04:42:18,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:18,862 INFO L225 Difference]: With dead ends: 91 [2020-10-13 04:42:18,862 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:42:18,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:42:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:42:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-13 04:42:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:42:18,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-13 04:42:18,874 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 47 [2020-10-13 04:42:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:18,874 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-13 04:42:18,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:42:18,875 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-13 04:42:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:42:18,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:18,876 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:18,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:42:18,879 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:18,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:18,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1502223792, now seen corresponding path program 10 times [2020-10-13 04:42:18,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:18,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899000734] [2020-10-13 04:42:18,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:18,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:18,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:23,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:23,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:42:23,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:23,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:42:23,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:42:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:42:23,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:24,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:24,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:24,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:24,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:24,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:24,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:42:24,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899000734] [2020-10-13 04:42:24,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:24,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:42:24,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300511761] [2020-10-13 04:42:24,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:42:24,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:24,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:42:24,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:24,016 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 12 states. [2020-10-13 04:42:24,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:24,203 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-10-13 04:42:24,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:42:24,203 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 04:42:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:24,204 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:42:24,204 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:42:24,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:42:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:42:24,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-13 04:42:24,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:42:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-13 04:42:24,218 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2020-10-13 04:42:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:24,221 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-13 04:42:24,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:42:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-13 04:42:24,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:42:24,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:24,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:24,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:42:24,223 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:24,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1368545479, now seen corresponding path program 11 times [2020-10-13 04:42:24,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:24,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957436565] [2020-10-13 04:42:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:24,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:29,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:42:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:29,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:42:29,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:29,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:29,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:29,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:29,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:29,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:42:29,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957436565] [2020-10-13 04:42:29,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:42:29,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044437698] [2020-10-13 04:42:29,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:42:29,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:42:29,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:29,378 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 13 states. [2020-10-13 04:42:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:29,528 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-10-13 04:42:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:42:29,528 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2020-10-13 04:42:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:29,529 INFO L225 Difference]: With dead ends: 107 [2020-10-13 04:42:29,529 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:42:29,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:42:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:42:29,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-13 04:42:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:42:29,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-13 04:42:29,535 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 57 [2020-10-13 04:42:29,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:29,536 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-13 04:42:29,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:42:29,536 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-13 04:42:29,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:42:29,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:29,537 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:29,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:42:29,537 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:29,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash -875588940, now seen corresponding path program 12 times [2020-10-13 04:42:29,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:29,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685174266] [2020-10-13 04:42:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:29,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:30,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:34,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:42:34,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:34,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:42:34,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:42:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:34,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:42:34,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:34,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:34,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:34,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:34,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:34,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:34,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:34,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:34,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:34,684 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:42:34,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685174266] [2020-10-13 04:42:34,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:34,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:42:34,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206574667] [2020-10-13 04:42:34,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:42:34,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:34,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:42:34,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:34,687 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 14 states. [2020-10-13 04:42:34,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:34,832 INFO L93 Difference]: Finished difference Result 115 states and 140 transitions. [2020-10-13 04:42:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:42:34,833 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 04:42:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:34,834 INFO L225 Difference]: With dead ends: 115 [2020-10-13 04:42:34,834 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:42:34,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:42:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:42:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-13 04:42:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:42:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-13 04:42:34,846 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 62 [2020-10-13 04:42:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:34,847 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-13 04:42:34,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:42:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-13 04:42:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:42:34,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:34,848 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:34,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:42:34,848 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2053509419, now seen corresponding path program 13 times [2020-10-13 04:42:34,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:34,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622218082] [2020-10-13 04:42:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:34,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:34,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:36,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:39,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:42:39,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:40,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:40,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:40,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:40,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:40,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:40,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:40,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:40,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:40,011 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:42:40,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622218082] [2020-10-13 04:42:40,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:40,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:42:40,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633368507] [2020-10-13 04:42:40,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:42:40,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:40,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:42:40,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:40,016 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 15 states. [2020-10-13 04:42:40,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:40,175 INFO L93 Difference]: Finished difference Result 123 states and 150 transitions. [2020-10-13 04:42:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:42:40,178 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-10-13 04:42:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:40,179 INFO L225 Difference]: With dead ends: 123 [2020-10-13 04:42:40,179 INFO L226 Difference]: Without dead ends: 80 [2020-10-13 04:42:40,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:42:40,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-13 04:42:40,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-13 04:42:40,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:42:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-13 04:42:40,192 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 67 [2020-10-13 04:42:40,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:40,193 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-13 04:42:40,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:42:40,193 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-13 04:42:40,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:42:40,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:40,194 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:40,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:42:40,194 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:40,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:40,194 INFO L82 PathProgramCache]: Analyzing trace with hash -119020776, now seen corresponding path program 14 times [2020-10-13 04:42:40,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:40,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085787729] [2020-10-13 04:42:40,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:40,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:42,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:45,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:45,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:42:45,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:42:45,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:45,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:45,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:45,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:45,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:45,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:45,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:45,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:45,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:45,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:45,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:45,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:42:45,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085787729] [2020-10-13 04:42:45,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:45,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:42:45,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385927811] [2020-10-13 04:42:45,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:42:45,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:45,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:42:45,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:45,385 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 16 states. [2020-10-13 04:42:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:45,610 INFO L93 Difference]: Finished difference Result 131 states and 160 transitions. [2020-10-13 04:42:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:42:45,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 04:42:45,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:45,612 INFO L225 Difference]: With dead ends: 131 [2020-10-13 04:42:45,612 INFO L226 Difference]: Without dead ends: 85 [2020-10-13 04:42:45,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:42:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-13 04:42:45,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-13 04:42:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:42:45,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-13 04:42:45,621 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 72 [2020-10-13 04:42:45,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:45,621 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-13 04:42:45,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:42:45,622 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-13 04:42:45,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:42:45,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:45,632 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:45,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:42:45,632 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:45,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1990358641, now seen corresponding path program 15 times [2020-10-13 04:42:45,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:45,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099097850] [2020-10-13 04:42:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:45,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:45,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:48,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:50,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:50,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:42:50,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:50,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:50,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:50,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:50,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:50,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:50,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:50,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:50,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:50,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:50,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:50,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:42:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:42:50,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099097850] [2020-10-13 04:42:50,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:50,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:42:50,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138443320] [2020-10-13 04:42:50,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:42:50,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:50,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:42:50,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:42:50,832 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 17 states. [2020-10-13 04:42:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:51,005 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2020-10-13 04:42:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:42:51,006 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2020-10-13 04:42:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:51,007 INFO L225 Difference]: With dead ends: 139 [2020-10-13 04:42:51,007 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:42:51,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:42:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:42:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-13 04:42:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:42:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-13 04:42:51,017 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 77 [2020-10-13 04:42:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:51,018 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-13 04:42:51,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:42:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-13 04:42:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:42:51,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:51,020 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:51,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:42:51,021 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:51,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:51,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1114182524, now seen corresponding path program 16 times [2020-10-13 04:42:51,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:51,022 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934470033] [2020-10-13 04:42:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:51,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:51,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:51,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:56,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:42:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:56,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:42:56,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:56,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:56,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:56,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:56,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:42:56,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934470033] [2020-10-13 04:42:56,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:56,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:42:56,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949081017] [2020-10-13 04:42:56,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:42:56,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:42:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:56,236 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 18 states. [2020-10-13 04:42:56,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:56,478 INFO L93 Difference]: Finished difference Result 147 states and 180 transitions. [2020-10-13 04:42:56,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:42:56,479 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-13 04:42:56,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:56,480 INFO L225 Difference]: With dead ends: 147 [2020-10-13 04:42:56,481 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 04:42:56,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:42:56,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 04:42:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-13 04:42:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:42:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-13 04:42:56,486 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 82 [2020-10-13 04:42:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:56,487 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-13 04:42:56,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:42:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-13 04:42:56,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:42:56,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:56,488 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:56,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:42:56,488 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:56,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:56,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2137194995, now seen corresponding path program 17 times [2020-10-13 04:42:56,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:56,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [47838990] [2020-10-13 04:42:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:56,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:56,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:00,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:01,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:01,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:43:01,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:43:01,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:01,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:01,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:01,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:01,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:01,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:01,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:01,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:01,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:43:01,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [47838990] [2020-10-13 04:43:01,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:01,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:43:01,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43659337] [2020-10-13 04:43:01,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:43:01,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:43:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:01,706 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 19 states. [2020-10-13 04:43:01,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:01,938 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-10-13 04:43:01,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:43:01,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2020-10-13 04:43:01,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:01,940 INFO L225 Difference]: With dead ends: 155 [2020-10-13 04:43:01,940 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:43:01,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:43:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:43:01,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-13 04:43:01,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:43:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-13 04:43:01,944 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 87 [2020-10-13 04:43:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:01,945 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-13 04:43:01,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:43:01,945 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-13 04:43:01,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:43:01,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:01,946 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:01,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:43:01,946 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:01,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:01,946 INFO L82 PathProgramCache]: Analyzing trace with hash 243098592, now seen corresponding path program 18 times [2020-10-13 04:43:01,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:01,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101656623] [2020-10-13 04:43:01,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:01,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:02,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:02,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:06,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:06,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:43:06,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:06,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:43:06,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:43:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:06,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:43:06,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:43:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:07,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:07,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:07,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:07,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:07,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:43:07,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101656623] [2020-10-13 04:43:07,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:07,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:43:07,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444299155] [2020-10-13 04:43:07,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:43:07,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:43:07,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:07,185 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 20 states. [2020-10-13 04:43:07,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:07,448 INFO L93 Difference]: Finished difference Result 163 states and 200 transitions. [2020-10-13 04:43:07,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:43:07,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 04:43:07,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:07,450 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:43:07,450 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:43:07,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:43:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:43:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-13 04:43:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:43:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-13 04:43:07,457 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 92 [2020-10-13 04:43:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:07,459 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-13 04:43:07,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:43:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-13 04:43:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:43:07,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:07,461 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:07,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:43:07,461 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1595884969, now seen corresponding path program 19 times [2020-10-13 04:43:07,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:07,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442445574] [2020-10-13 04:43:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:07,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:08,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:12,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:12,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:43:12,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:12,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:43:12,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:43:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:12,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:43:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:12,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:12,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:43:12,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442445574] [2020-10-13 04:43:12,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:12,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:43:12,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64008087] [2020-10-13 04:43:12,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:43:12,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:12,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:43:12,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:12,720 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 21 states. [2020-10-13 04:43:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:12,993 INFO L93 Difference]: Finished difference Result 171 states and 210 transitions. [2020-10-13 04:43:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:43:12,994 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-10-13 04:43:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:12,996 INFO L225 Difference]: With dead ends: 171 [2020-10-13 04:43:12,996 INFO L226 Difference]: Without dead ends: 110 [2020-10-13 04:43:12,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:43:12,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-13 04:43:13,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-13 04:43:13,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:43:13,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-13 04:43:13,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 97 [2020-10-13 04:43:13,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:13,008 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-13 04:43:13,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:43:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-13 04:43:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:43:13,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:13,010 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:13,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:43:13,011 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:13,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:13,012 INFO L82 PathProgramCache]: Analyzing trace with hash -120646588, now seen corresponding path program 20 times [2020-10-13 04:43:13,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:13,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675353497] [2020-10-13 04:43:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:13,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:13,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:18,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:43:18,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:18,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:18,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:18,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:18,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:43:18,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675353497] [2020-10-13 04:43:18,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:18,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:43:18,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441898302] [2020-10-13 04:43:18,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:43:18,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:18,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:43:18,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:18,287 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 22 states. [2020-10-13 04:43:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:18,570 INFO L93 Difference]: Finished difference Result 179 states and 220 transitions. [2020-10-13 04:43:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:43:18,570 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 102 [2020-10-13 04:43:18,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:18,571 INFO L225 Difference]: With dead ends: 179 [2020-10-13 04:43:18,571 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 04:43:18,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:43:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 04:43:18,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-13 04:43:18,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:43:18,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-10-13 04:43:18,577 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 102 [2020-10-13 04:43:18,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:18,577 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-10-13 04:43:18,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:43:18,578 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-10-13 04:43:18,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:43:18,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:18,579 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:18,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:43:18,579 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:18,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1505817275, now seen corresponding path program 21 times [2020-10-13 04:43:18,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:18,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803859139] [2020-10-13 04:43:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:18,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:18,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:19,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:43:23,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:23,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:43:23,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:23,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:23,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:23,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:23,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:23,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:23,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:23,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:23,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:23,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:23,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:23,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:23,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 838 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:43:23,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803859139] [2020-10-13 04:43:23,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:23,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:43:23,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026442132] [2020-10-13 04:43:23,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:43:23,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:43:23,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:43:23,882 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 23 states. [2020-10-13 04:43:24,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:24,103 INFO L93 Difference]: Finished difference Result 187 states and 230 transitions. [2020-10-13 04:43:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:43:24,103 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-10-13 04:43:24,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:24,105 INFO L225 Difference]: With dead ends: 187 [2020-10-13 04:43:24,105 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:43:24,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:43:24,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:43:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-13 04:43:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 04:43:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-13 04:43:24,111 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 107 [2020-10-13 04:43:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:24,111 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-13 04:43:24,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:43:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-13 04:43:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:43:24,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:24,112 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:24,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:43:24,113 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1232575320, now seen corresponding path program 22 times [2020-10-13 04:43:24,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:24,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221344869] [2020-10-13 04:43:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:24,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:24,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:25,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:29,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:29,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:43:29,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:43:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:43:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:43:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:29,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:29,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:29,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:29,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:29,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 932 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:43:29,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221344869] [2020-10-13 04:43:29,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:29,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:43:29,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504709622] [2020-10-13 04:43:29,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:43:29,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:43:29,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:29,450 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 24 states. [2020-10-13 04:43:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:29,698 INFO L93 Difference]: Finished difference Result 195 states and 240 transitions. [2020-10-13 04:43:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:43:29,699 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-10-13 04:43:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:29,700 INFO L225 Difference]: With dead ends: 195 [2020-10-13 04:43:29,701 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 04:43:29,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:43:29,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 04:43:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-13 04:43:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:43:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-13 04:43:29,708 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 112 [2020-10-13 04:43:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:29,708 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-13 04:43:29,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:43:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-13 04:43:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:43:29,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:29,710 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:29,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:43:29,710 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:29,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash -560851743, now seen corresponding path program 23 times [2020-10-13 04:43:29,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:29,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519002697] [2020-10-13 04:43:29,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:29,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:30,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:31,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:34,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:43:34,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:34,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:43:34,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:35,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:35,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:35,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:35,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:43:35,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519002697] [2020-10-13 04:43:35,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:35,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:43:35,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040734103] [2020-10-13 04:43:35,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:43:35,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:43:35,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:43:35,064 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 25 states. [2020-10-13 04:43:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:35,388 INFO L93 Difference]: Finished difference Result 203 states and 250 transitions. [2020-10-13 04:43:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:43:35,389 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2020-10-13 04:43:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:35,391 INFO L225 Difference]: With dead ends: 203 [2020-10-13 04:43:35,391 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:43:35,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:43:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:43:35,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-13 04:43:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 04:43:35,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-10-13 04:43:35,399 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 117 [2020-10-13 04:43:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:35,399 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-10-13 04:43:35,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:43:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-10-13 04:43:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:43:35,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:35,400 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:35,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:43:35,401 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash -95185652, now seen corresponding path program 24 times [2020-10-13 04:43:35,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:35,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603116308] [2020-10-13 04:43:35,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:35,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:35,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:40,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:43:40,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:40,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:43:40,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:40,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:40,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:40,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:40,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:40,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:40,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:40,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:40,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 04:43:40,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603116308] [2020-10-13 04:43:40,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:40,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:43:40,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78462456] [2020-10-13 04:43:40,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:43:40,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:43:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:43:40,788 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 26 states. [2020-10-13 04:43:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:41,116 INFO L93 Difference]: Finished difference Result 211 states and 260 transitions. [2020-10-13 04:43:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:43:41,117 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 122 [2020-10-13 04:43:41,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:41,118 INFO L225 Difference]: With dead ends: 211 [2020-10-13 04:43:41,118 INFO L226 Difference]: Without dead ends: 135 [2020-10-13 04:43:41,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:43:41,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-13 04:43:41,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-13 04:43:41,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:43:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-13 04:43:41,126 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 122 [2020-10-13 04:43:41,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:41,126 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-13 04:43:41,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:43:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-13 04:43:41,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:43:41,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:41,127 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:41,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:43:41,128 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:41,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:41,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1590813571, now seen corresponding path program 25 times [2020-10-13 04:43:41,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:41,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857304081] [2020-10-13 04:43:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:41,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 04:43:46,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:43:46,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:46,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:46,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:46,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:46,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:46,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:46,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:46,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:46,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1244 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 04:43:46,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857304081] [2020-10-13 04:43:46,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:46,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:43:46,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660801244] [2020-10-13 04:43:46,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:43:46,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:46,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:43:46,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:43:46,555 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 27 states. [2020-10-13 04:43:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:46,954 INFO L93 Difference]: Finished difference Result 219 states and 270 transitions. [2020-10-13 04:43:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:43:46,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 127 [2020-10-13 04:43:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:46,956 INFO L225 Difference]: With dead ends: 219 [2020-10-13 04:43:46,956 INFO L226 Difference]: Without dead ends: 140 [2020-10-13 04:43:46,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:43:46,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-13 04:43:46,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-13 04:43:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:43:46,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-10-13 04:43:46,964 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 127 [2020-10-13 04:43:46,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:46,964 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-10-13 04:43:46,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:43:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-10-13 04:43:46,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 04:43:46,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:46,965 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:46,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:43:46,966 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:46,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:46,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1482351984, now seen corresponding path program 26 times [2020-10-13 04:43:46,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:46,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406364413] [2020-10-13 04:43:46,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:46,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:49,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:43:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:52,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:52,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:52,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:52,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:52,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:52,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:52,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:52,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:52,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:52,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:52,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 04:43:52,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406364413] [2020-10-13 04:43:52,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:52,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:43:52,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148159628] [2020-10-13 04:43:52,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:43:52,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:52,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:43:52,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:43:52,396 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 28 states. [2020-10-13 04:43:52,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:52,760 INFO L93 Difference]: Finished difference Result 227 states and 280 transitions. [2020-10-13 04:43:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:43:52,760 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 132 [2020-10-13 04:43:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:52,762 INFO L225 Difference]: With dead ends: 227 [2020-10-13 04:43:52,762 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:43:52,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:43:52,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:43:52,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-13 04:43:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:43:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-13 04:43:52,775 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 132 [2020-10-13 04:43:52,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:52,775 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-13 04:43:52,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:43:52,775 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-13 04:43:52,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:43:52,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:52,776 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:52,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:43:52,777 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:52,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:52,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1280777191, now seen corresponding path program 27 times [2020-10-13 04:43:52,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:52,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251652878] [2020-10-13 04:43:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:52,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:53,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:54,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:57,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:57,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:43:57,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:43:57,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:43:57,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:43:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:43:57,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:43:57,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:58,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:43:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:58,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:43:58,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:43:58,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:43:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:43:58,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1477 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 04:43:58,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251652878] [2020-10-13 04:43:58,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:43:58,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:43:58,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555655793] [2020-10-13 04:43:58,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:43:58,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:43:58,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:43:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:43:58,225 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 29 states. [2020-10-13 04:43:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:43:58,525 INFO L93 Difference]: Finished difference Result 235 states and 290 transitions. [2020-10-13 04:43:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:43:58,525 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 137 [2020-10-13 04:43:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:43:58,527 INFO L225 Difference]: With dead ends: 235 [2020-10-13 04:43:58,527 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 04:43:58,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:43:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 04:43:58,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-13 04:43:58,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:43:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-13 04:43:58,535 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 137 [2020-10-13 04:43:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:43:58,535 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-13 04:43:58,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:43:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-13 04:43:58,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:43:58,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:43:58,536 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:43:58,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:43:58,537 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:43:58,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:43:58,537 INFO L82 PathProgramCache]: Analyzing trace with hash 709400020, now seen corresponding path program 28 times [2020-10-13 04:43:58,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:43:58,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445711905] [2020-10-13 04:43:58,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:43:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:43:58,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:43:59,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:01,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:03,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:44:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:03,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:44:03,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:04,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:04,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:04,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:04,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:04,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:04,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:04,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:04,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:04,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1601 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 04:44:04,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445711905] [2020-10-13 04:44:04,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:04,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:44:04,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766748210] [2020-10-13 04:44:04,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:44:04,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:04,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:44:04,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:04,102 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 30 states. [2020-10-13 04:44:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:04,490 INFO L93 Difference]: Finished difference Result 243 states and 300 transitions. [2020-10-13 04:44:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:44:04,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 142 [2020-10-13 04:44:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:04,492 INFO L225 Difference]: With dead ends: 243 [2020-10-13 04:44:04,492 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:44:04,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:44:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:44:04,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-13 04:44:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:44:04,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-10-13 04:44:04,499 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 142 [2020-10-13 04:44:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:04,499 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-10-13 04:44:04,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:44:04,499 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-10-13 04:44:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:44:04,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:04,501 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:04,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:44:04,501 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:04,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:04,502 INFO L82 PathProgramCache]: Analyzing trace with hash 605563829, now seen corresponding path program 29 times [2020-10-13 04:44:04,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:04,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464997022] [2020-10-13 04:44:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:05,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:09,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:09,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:44:09,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:09,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:44:09,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:44:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:44:09,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:10,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:10,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:10,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:10,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:10,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:44:10,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:10,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:10,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1730 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 04:44:10,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464997022] [2020-10-13 04:44:10,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:10,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:44:10,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027330560] [2020-10-13 04:44:10,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:44:10,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:10,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:44:10,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:44:10,109 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 31 states. [2020-10-13 04:44:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:10,544 INFO L93 Difference]: Finished difference Result 251 states and 310 transitions. [2020-10-13 04:44:10,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:44:10,545 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 147 [2020-10-13 04:44:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:10,546 INFO L225 Difference]: With dead ends: 251 [2020-10-13 04:44:10,546 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:44:10,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:44:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:44:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-13 04:44:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 04:44:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-10-13 04:44:10,554 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 147 [2020-10-13 04:44:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:10,555 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-10-13 04:44:10,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:44:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-10-13 04:44:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 04:44:10,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:10,557 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:10,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:44:10,557 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:10,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1934026296, now seen corresponding path program 30 times [2020-10-13 04:44:10,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:10,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893662745] [2020-10-13 04:44:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:10,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:10,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:15,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:15,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 04:44:15,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:15,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:44:15,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:44:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:15,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:44:15,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:16,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:16,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:16,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:16,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:16,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:16,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1864 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 04:44:16,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893662745] [2020-10-13 04:44:16,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:16,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:44:16,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257732214] [2020-10-13 04:44:16,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:44:16,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:16,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:44:16,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:44:16,092 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 32 states. [2020-10-13 04:44:16,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:16,494 INFO L93 Difference]: Finished difference Result 259 states and 320 transitions. [2020-10-13 04:44:16,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:44:16,496 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 152 [2020-10-13 04:44:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:16,497 INFO L225 Difference]: With dead ends: 259 [2020-10-13 04:44:16,498 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 04:44:16,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:44:16,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 04:44:16,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-13 04:44:16,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:44:16,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-10-13 04:44:16,509 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 152 [2020-10-13 04:44:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:16,510 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-10-13 04:44:16,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:44:16,510 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-10-13 04:44:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 04:44:16,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:16,511 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:16,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:44:16,512 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1695658833, now seen corresponding path program 31 times [2020-10-13 04:44:16,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:16,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724946773] [2020-10-13 04:44:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:16,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:16,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:18,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:18,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:21,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:44:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:44:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:22,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:22,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:22,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:22,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:22,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:22,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:22,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:22,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:22,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2003 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 04:44:22,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724946773] [2020-10-13 04:44:22,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:22,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:44:22,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216651355] [2020-10-13 04:44:22,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:44:22,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:22,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:44:22,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:44:22,121 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 33 states. [2020-10-13 04:44:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:22,435 INFO L93 Difference]: Finished difference Result 267 states and 330 transitions. [2020-10-13 04:44:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:44:22,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 157 [2020-10-13 04:44:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:22,436 INFO L225 Difference]: With dead ends: 267 [2020-10-13 04:44:22,436 INFO L226 Difference]: Without dead ends: 170 [2020-10-13 04:44:22,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:44:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-13 04:44:22,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-13 04:44:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 04:44:22,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-10-13 04:44:22,446 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 157 [2020-10-13 04:44:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:22,447 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-10-13 04:44:22,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:44:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-10-13 04:44:22,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 04:44:22,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:22,448 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:22,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:44:22,449 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1006627172, now seen corresponding path program 32 times [2020-10-13 04:44:22,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:22,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118332535] [2020-10-13 04:44:22,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:22,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:24,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:26,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:27,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:27,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:44:27,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:28,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:28,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:28,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:28,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 04:44:28,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118332535] [2020-10-13 04:44:28,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:28,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:44:28,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205532027] [2020-10-13 04:44:28,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:44:28,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:28,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:44:28,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:44:28,079 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 34 states. [2020-10-13 04:44:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:28,413 INFO L93 Difference]: Finished difference Result 275 states and 340 transitions. [2020-10-13 04:44:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:44:28,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 162 [2020-10-13 04:44:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:28,416 INFO L225 Difference]: With dead ends: 275 [2020-10-13 04:44:28,416 INFO L226 Difference]: Without dead ends: 175 [2020-10-13 04:44:28,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:44:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-13 04:44:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-13 04:44:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:44:28,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-10-13 04:44:28,424 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 162 [2020-10-13 04:44:28,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:28,424 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-10-13 04:44:28,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:44:28,424 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-10-13 04:44:28,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 04:44:28,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:28,426 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:28,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:44:28,426 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1772829421, now seen corresponding path program 33 times [2020-10-13 04:44:28,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:28,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65210393] [2020-10-13 04:44:28,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:28,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:30,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:33,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:33,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:33,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 04:44:33,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:33,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 04:44:33,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:44:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:33,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:44:33,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:34,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:34,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:34,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:34,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:34,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:34,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:34,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:34,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:34,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:34,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2296 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 04:44:34,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65210393] [2020-10-13 04:44:34,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:34,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:44:34,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299766090] [2020-10-13 04:44:34,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:44:34,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:34,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:44:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:44:34,119 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 35 states. [2020-10-13 04:44:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:34,551 INFO L93 Difference]: Finished difference Result 283 states and 350 transitions. [2020-10-13 04:44:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:44:34,552 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2020-10-13 04:44:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:34,553 INFO L225 Difference]: With dead ends: 283 [2020-10-13 04:44:34,554 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 04:44:34,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:44:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 04:44:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-13 04:44:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 04:44:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-10-13 04:44:34,561 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 167 [2020-10-13 04:44:34,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:34,561 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-10-13 04:44:34,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:44:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-10-13 04:44:34,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 04:44:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:34,563 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:34,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:44:34,563 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 513697536, now seen corresponding path program 34 times [2020-10-13 04:44:34,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:34,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48666829] [2020-10-13 04:44:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:34,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:39,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:39,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:39,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:44:39,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:40,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:40,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:40,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:40,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 04:44:40,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48666829] [2020-10-13 04:44:40,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:40,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:44:40,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221939699] [2020-10-13 04:44:40,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:44:40,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:44:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:44:40,272 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 36 states. [2020-10-13 04:44:40,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:40,737 INFO L93 Difference]: Finished difference Result 291 states and 360 transitions. [2020-10-13 04:44:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:44:40,737 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 172 [2020-10-13 04:44:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:40,739 INFO L225 Difference]: With dead ends: 291 [2020-10-13 04:44:40,740 INFO L226 Difference]: Without dead ends: 185 [2020-10-13 04:44:40,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:44:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-13 04:44:40,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-13 04:44:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:44:40,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-10-13 04:44:40,748 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 172 [2020-10-13 04:44:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:40,748 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-10-13 04:44:40,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:44:40,749 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-10-13 04:44:40,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 04:44:40,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:40,750 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:40,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:44:40,750 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:40,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:40,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1048935799, now seen corresponding path program 35 times [2020-10-13 04:44:40,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:40,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320049757] [2020-10-13 04:44:40,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:40,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:45,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:44:45,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:45,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:44:45,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:46,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:46,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:46,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2609 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 04:44:46,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320049757] [2020-10-13 04:44:46,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:46,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:44:46,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588074528] [2020-10-13 04:44:46,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:44:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:44:46,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:44:46,492 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 37 states. [2020-10-13 04:44:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:47,068 INFO L93 Difference]: Finished difference Result 299 states and 370 transitions. [2020-10-13 04:44:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:44:47,068 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 177 [2020-10-13 04:44:47,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:47,070 INFO L225 Difference]: With dead ends: 299 [2020-10-13 04:44:47,070 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 04:44:47,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:44:47,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 04:44:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-13 04:44:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:44:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-10-13 04:44:47,082 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 177 [2020-10-13 04:44:47,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:47,082 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-10-13 04:44:47,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:44:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-10-13 04:44:47,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 04:44:47,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:47,087 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:47,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:44:47,087 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:47,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:47,088 INFO L82 PathProgramCache]: Analyzing trace with hash -624158876, now seen corresponding path program 36 times [2020-10-13 04:44:47,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:47,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398080198] [2020-10-13 04:44:47,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:47,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:47,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:50,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:52,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:52,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:44:52,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:52,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:52,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:52,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:52,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:52,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:52,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:52,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:52,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:52,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2773 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 04:44:52,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398080198] [2020-10-13 04:44:52,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:52,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:44:52,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415957984] [2020-10-13 04:44:52,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:44:52,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:44:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:44:52,880 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 38 states. [2020-10-13 04:44:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:53,374 INFO L93 Difference]: Finished difference Result 307 states and 380 transitions. [2020-10-13 04:44:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:44:53,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 182 [2020-10-13 04:44:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:53,377 INFO L225 Difference]: With dead ends: 307 [2020-10-13 04:44:53,377 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 04:44:53,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:44:53,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 04:44:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-13 04:44:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:44:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-10-13 04:44:53,385 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 182 [2020-10-13 04:44:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:53,385 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-10-13 04:44:53,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:44:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-10-13 04:44:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:44:53,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:53,387 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:53,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:44:53,388 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:53,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1265284571, now seen corresponding path program 37 times [2020-10-13 04:44:53,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:53,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470364141] [2020-10-13 04:44:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:53,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:58,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:58,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:44:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:44:58,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:44:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:59,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:44:59,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:44:59,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:44:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2942 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 04:44:59,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470364141] [2020-10-13 04:44:59,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:44:59,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:44:59,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802343551] [2020-10-13 04:44:59,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:44:59,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:44:59,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:44:59,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:44:59,290 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 39 states. [2020-10-13 04:44:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:44:59,745 INFO L93 Difference]: Finished difference Result 315 states and 390 transitions. [2020-10-13 04:44:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:44:59,745 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 187 [2020-10-13 04:44:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:44:59,747 INFO L225 Difference]: With dead ends: 315 [2020-10-13 04:44:59,747 INFO L226 Difference]: Without dead ends: 200 [2020-10-13 04:44:59,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:44:59,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-13 04:44:59,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-13 04:44:59,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 04:44:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-10-13 04:44:59,759 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 187 [2020-10-13 04:44:59,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:44:59,760 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-10-13 04:44:59,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:44:59,764 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-10-13 04:44:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 04:44:59,765 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:44:59,765 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:44:59,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:44:59,765 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:44:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:44:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1984731192, now seen corresponding path program 38 times [2020-10-13 04:44:59,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:44:59,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658004725] [2020-10-13 04:44:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:44:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:44:59,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:44:59,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:45:04,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:04,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:45:04,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:05,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:05,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:05,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:05,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3116 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 04:45:05,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658004725] [2020-10-13 04:45:05,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:05,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:45:05,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835067140] [2020-10-13 04:45:05,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:45:05,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:05,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:45:05,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:45:05,667 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 40 states. [2020-10-13 04:45:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:06,074 INFO L93 Difference]: Finished difference Result 323 states and 400 transitions. [2020-10-13 04:45:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:45:06,074 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 192 [2020-10-13 04:45:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:06,076 INFO L225 Difference]: With dead ends: 323 [2020-10-13 04:45:06,076 INFO L226 Difference]: Without dead ends: 205 [2020-10-13 04:45:06,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:45:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-13 04:45:06,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-13 04:45:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 04:45:06,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-10-13 04:45:06,084 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 192 [2020-10-13 04:45:06,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:06,084 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-10-13 04:45:06,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:45:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-10-13 04:45:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 04:45:06,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:06,085 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:06,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:45:06,085 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:06,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:06,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1603359169, now seen corresponding path program 39 times [2020-10-13 04:45:06,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:06,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743811333] [2020-10-13 04:45:06,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:06,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:06,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:45:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:11,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:45:11,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:11,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:11,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:11,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:11,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:11,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:11,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3295 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-13 04:45:12,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743811333] [2020-10-13 04:45:12,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:12,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:45:12,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352471316] [2020-10-13 04:45:12,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:45:12,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:12,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:45:12,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:45:12,010 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 41 states. [2020-10-13 04:45:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:12,463 INFO L93 Difference]: Finished difference Result 331 states and 410 transitions. [2020-10-13 04:45:12,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:45:12,464 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 197 [2020-10-13 04:45:12,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:12,466 INFO L225 Difference]: With dead ends: 331 [2020-10-13 04:45:12,466 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 04:45:12,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:45:12,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 04:45:12,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-13 04:45:12,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 04:45:12,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-10-13 04:45:12,476 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 197 [2020-10-13 04:45:12,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:12,476 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-10-13 04:45:12,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:45:12,476 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-10-13 04:45:12,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 04:45:12,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:12,478 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:12,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:45:12,478 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:12,479 INFO L82 PathProgramCache]: Analyzing trace with hash -637626324, now seen corresponding path program 40 times [2020-10-13 04:45:12,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:12,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423152582] [2020-10-13 04:45:12,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:12,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:12,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:17,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:17,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 04:45:17,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:17,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:45:17,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:17,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:45:17,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:17,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:45:17,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:18,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:18,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:18,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:18,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-13 04:45:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423152582] [2020-10-13 04:45:18,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:18,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:45:18,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12834807] [2020-10-13 04:45:18,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:45:18,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:18,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:45:18,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:45:18,432 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 42 states. [2020-10-13 04:45:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:18,998 INFO L93 Difference]: Finished difference Result 339 states and 420 transitions. [2020-10-13 04:45:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:45:18,999 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 202 [2020-10-13 04:45:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:19,001 INFO L225 Difference]: With dead ends: 339 [2020-10-13 04:45:19,001 INFO L226 Difference]: Without dead ends: 215 [2020-10-13 04:45:19,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:45:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-13 04:45:19,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-13 04:45:19,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 04:45:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-10-13 04:45:19,010 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 202 [2020-10-13 04:45:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:19,010 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-10-13 04:45:19,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:45:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-10-13 04:45:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 04:45:19,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:19,012 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:19,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:45:19,012 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash -813409955, now seen corresponding path program 41 times [2020-10-13 04:45:19,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:19,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87307969] [2020-10-13 04:45:19,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:19,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:24,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:45:24,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:24,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:45:24,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:25,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:25,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:25,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:25,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:25,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:25,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:45:25,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:25,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:25,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3668 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-13 04:45:25,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87307969] [2020-10-13 04:45:25,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:25,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:45:25,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180733936] [2020-10-13 04:45:25,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:45:25,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:45:25,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:45:25,045 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 43 states. [2020-10-13 04:45:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:25,520 INFO L93 Difference]: Finished difference Result 347 states and 430 transitions. [2020-10-13 04:45:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:45:25,520 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 207 [2020-10-13 04:45:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:25,522 INFO L225 Difference]: With dead ends: 347 [2020-10-13 04:45:25,522 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 04:45:25,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:45:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 04:45:25,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-13 04:45:25,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 04:45:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-10-13 04:45:25,530 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 207 [2020-10-13 04:45:25,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:25,530 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-10-13 04:45:25,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:45:25,530 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-10-13 04:45:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-13 04:45:25,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:25,531 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:25,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:45:25,532 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:25,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:25,532 INFO L82 PathProgramCache]: Analyzing trace with hash 2077747344, now seen corresponding path program 42 times [2020-10-13 04:45:25,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:25,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603504221] [2020-10-13 04:45:25,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:25,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:30,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:45:30,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:30,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:45:30,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:31,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:31,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:31,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:31,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:31,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:31,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:31,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3862 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-13 04:45:31,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603504221] [2020-10-13 04:45:31,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:31,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:45:31,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213781069] [2020-10-13 04:45:31,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:45:31,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:45:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:45:31,561 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 44 states. [2020-10-13 04:45:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:32,045 INFO L93 Difference]: Finished difference Result 355 states and 440 transitions. [2020-10-13 04:45:32,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:45:32,046 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2020-10-13 04:45:32,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:32,048 INFO L225 Difference]: With dead ends: 355 [2020-10-13 04:45:32,048 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 04:45:32,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:45:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 04:45:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-13 04:45:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 04:45:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2020-10-13 04:45:32,056 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 212 [2020-10-13 04:45:32,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:32,057 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2020-10-13 04:45:32,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:45:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2020-10-13 04:45:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 04:45:32,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:32,058 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:32,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:45:32,059 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:32,059 INFO L82 PathProgramCache]: Analyzing trace with hash 503587065, now seen corresponding path program 43 times [2020-10-13 04:45:32,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:32,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196192444] [2020-10-13 04:45:32,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:32,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:37,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:45:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:37,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:45:37,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:38,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:38,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:38,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:38,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:38,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:38,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:38,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:38,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:38,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 4061 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-13 04:45:38,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196192444] [2020-10-13 04:45:38,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:38,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:45:38,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049537956] [2020-10-13 04:45:38,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:45:38,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:38,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:45:38,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:45:38,145 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 45 states. [2020-10-13 04:45:38,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:38,683 INFO L93 Difference]: Finished difference Result 363 states and 450 transitions. [2020-10-13 04:45:38,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:45:38,683 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 217 [2020-10-13 04:45:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:38,685 INFO L225 Difference]: With dead ends: 363 [2020-10-13 04:45:38,685 INFO L226 Difference]: Without dead ends: 230 [2020-10-13 04:45:38,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:45:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-13 04:45:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-13 04:45:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 04:45:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-10-13 04:45:38,694 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 217 [2020-10-13 04:45:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:38,694 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-10-13 04:45:38,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:45:38,694 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-10-13 04:45:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-13 04:45:38,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:38,696 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:38,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:45:38,696 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:38,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:38,696 INFO L82 PathProgramCache]: Analyzing trace with hash 82417908, now seen corresponding path program 44 times [2020-10-13 04:45:38,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:38,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819123663] [2020-10-13 04:45:38,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:38,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:38,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:38,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:43,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:43,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 04:45:43,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:45:43,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:44,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:44,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:44,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:44,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:44,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-10-13 04:45:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819123663] [2020-10-13 04:45:44,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:44,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:45:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607374898] [2020-10-13 04:45:44,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:45:44,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:45:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:45:44,860 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 46 states. [2020-10-13 04:45:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:45,501 INFO L93 Difference]: Finished difference Result 371 states and 460 transitions. [2020-10-13 04:45:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:45:45,501 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 222 [2020-10-13 04:45:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:45,503 INFO L225 Difference]: With dead ends: 371 [2020-10-13 04:45:45,504 INFO L226 Difference]: Without dead ends: 235 [2020-10-13 04:45:45,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:45:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-13 04:45:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-10-13 04:45:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:45:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2020-10-13 04:45:45,511 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 222 [2020-10-13 04:45:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:45,511 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2020-10-13 04:45:45,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:45:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2020-10-13 04:45:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:45:45,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:45,513 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:45,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:45:45,513 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:45,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:45,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1926862699, now seen corresponding path program 45 times [2020-10-13 04:45:45,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:45,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676297109] [2020-10-13 04:45:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:45,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:50,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:50,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:45:50,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-13 04:45:50,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:50,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:45:50,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:50,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:45:50,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:51,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:51,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:51,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:51,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4474 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2020-10-13 04:45:51,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676297109] [2020-10-13 04:45:51,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:51,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:45:51,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562952937] [2020-10-13 04:45:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:45:51,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:45:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:45:51,838 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 47 states. [2020-10-13 04:45:52,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:52,494 INFO L93 Difference]: Finished difference Result 379 states and 470 transitions. [2020-10-13 04:45:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:45:52,495 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 227 [2020-10-13 04:45:52,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:52,497 INFO L225 Difference]: With dead ends: 379 [2020-10-13 04:45:52,497 INFO L226 Difference]: Without dead ends: 240 [2020-10-13 04:45:52,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:45:52,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-13 04:45:52,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-10-13 04:45:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 04:45:52,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2020-10-13 04:45:52,504 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 227 [2020-10-13 04:45:52,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:52,505 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2020-10-13 04:45:52,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:45:52,505 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2020-10-13 04:45:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-13 04:45:52,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:52,506 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:52,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:45:52,507 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:52,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:52,507 INFO L82 PathProgramCache]: Analyzing trace with hash -732042920, now seen corresponding path program 46 times [2020-10-13 04:45:52,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:52,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401009625] [2020-10-13 04:45:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:52,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:57,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:57,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-13 04:45:57,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-13 04:45:57,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:45:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:58,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:45:58,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:45:58,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:45:58,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:45:58,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:45:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4688 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2020-10-13 04:45:58,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401009625] [2020-10-13 04:45:58,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:45:58,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-13 04:45:58,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034359767] [2020-10-13 04:45:58,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-13 04:45:58,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:45:58,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-13 04:45:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:45:58,877 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand 48 states. [2020-10-13 04:45:59,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:45:59,509 INFO L93 Difference]: Finished difference Result 387 states and 480 transitions. [2020-10-13 04:45:59,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 04:45:59,509 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 232 [2020-10-13 04:45:59,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:45:59,511 INFO L225 Difference]: With dead ends: 387 [2020-10-13 04:45:59,512 INFO L226 Difference]: Without dead ends: 245 [2020-10-13 04:45:59,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 04:45:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-13 04:45:59,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-10-13 04:45:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 04:45:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2020-10-13 04:45:59,519 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 232 [2020-10-13 04:45:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:45:59,519 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2020-10-13 04:45:59,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-13 04:45:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2020-10-13 04:45:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-13 04:45:59,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:45:59,521 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:45:59,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-13 04:45:59,521 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:45:59,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:45:59,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1551830991, now seen corresponding path program 47 times [2020-10-13 04:45:59,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:45:59,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344980281] [2020-10-13 04:45:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:45:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:45:59,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking...