/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/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:54:05,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:54:05,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:54:05,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:54:05,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:54:05,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:54:05,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:54:05,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:54:05,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:54:05,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:54:05,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:54:05,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:54:05,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:54:05,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:54:05,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:54:05,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:54:05,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:54:05,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:54:05,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:54:05,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:54:06,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:54:06,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:54:06,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:54:06,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:54:06,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:54:06,016 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:54:06,016 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:54:06,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:54:06,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:54:06,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:54:06,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:54:06,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:54:06,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:54:06,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:54:06,024 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:54:06,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:54:06,025 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:54:06,025 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:54:06,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:54:06,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:54:06,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:54:06,028 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 04:54:06,072 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:54:06,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:54:06,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:54:06,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:54:06,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:54:06,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:54:06,075 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:54:06,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:54:06,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:54:06,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:54:06,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:54:06,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:54:06,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:54:06,077 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:54:06,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:54:06,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:54:06,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:54:06,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:54:06,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:54:06,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:54:06,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:54:06,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:54:06,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:54:06,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:54:06,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:54:06,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:54:06,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:54:06,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:54:06,080 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:54:06,080 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 04:54:06,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:54:06,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:54:06,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:54:06,377 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:54:06,377 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:54:06,378 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-13 04:54:06,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8623324a/78e4c700f1fd471c992a9a8ebaa9c193/FLAG1ce42df02 [2020-10-13 04:54:06,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:54:06,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-13 04:54:06,892 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8623324a/78e4c700f1fd471c992a9a8ebaa9c193/FLAG1ce42df02 [2020-10-13 04:54:07,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b8623324a/78e4c700f1fd471c992a9a8ebaa9c193 [2020-10-13 04:54:07,296 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:54:07,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:54:07,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:07,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:54:07,304 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:54:07,305 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@589fe6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07, skipping insertion in model container [2020-10-13 04:54:07,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:54:07,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:54:07,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:07,531 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:54:07,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:54:07,578 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:54:07,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07 WrapperNode [2020-10-13 04:54:07,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:54:07,579 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:54:07,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:54:07,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:54:07,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (1/1) ... [2020-10-13 04:54:07,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:54:07,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:54:07,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:54:07,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:54:07,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (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 04:54:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:54:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:54:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:54:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:54:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:54:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:54:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:54:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:54:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:54:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:54:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:54:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:54:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:54:08,138 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:54:08,138 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-13 04:54:08,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:08 BoogieIcfgContainer [2020-10-13 04:54:08,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:54:08,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:54:08,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:54:08,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:54:08,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:54:07" (1/3) ... [2020-10-13 04:54:08,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9851c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:08, skipping insertion in model container [2020-10-13 04:54:08,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:54:07" (2/3) ... [2020-10-13 04:54:08,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9851c80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:54:08, skipping insertion in model container [2020-10-13 04:54:08,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:54:08" (3/3) ... [2020-10-13 04:54:08,150 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-10-13 04:54:08,161 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:54:08,168 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:54:08,182 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:54:08,206 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:54:08,207 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:54:08,207 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:54:08,207 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:54:08,207 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:54:08,207 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:54:08,207 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:54:08,208 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:54:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 04:54:08,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:54:08,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:08,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:08,233 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:08,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:08,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1058720290, now seen corresponding path program 1 times [2020-10-13 04:54:08,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:08,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547941549] [2020-10-13 04:54:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:08,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:09,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:54:09,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:09,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 829 [2020-10-13 04:54:09,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:09,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:09,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:54:09,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:09,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:54:09,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:09,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:09,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:54:09,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:09,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:09,313 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 04:54:09,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547941549] [2020-10-13 04:54:09,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:09,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:54:09,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344084269] [2020-10-13 04:54:09,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:54:09,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:09,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:54:09,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:54:09,343 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 04:54:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:09,492 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2020-10-13 04:54:09,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:54:09,495 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-13 04:54:09,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:09,505 INFO L225 Difference]: With dead ends: 59 [2020-10-13 04:54:09,506 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:54:09,510 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 04:54:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:54:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:54:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:54:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-13 04:54:09,579 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2020-10-13 04:54:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:09,579 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-13 04:54:09,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:54:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-13 04:54:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 04:54:09,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:09,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:09,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:54:09,583 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:09,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1432039210, now seen corresponding path program 1 times [2020-10-13 04:54:09,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:09,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021020233] [2020-10-13 04:54:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:10,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 04:54:10,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:10,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-13 04:54:10,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:54:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 04:54:10,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:54:10,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:10,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:10,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:10,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:10,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:10,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:54:10,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:10,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:10,430 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 04:54:10,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021020233] [2020-10-13 04:54:10,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:54:10,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:54:10,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193295449] [2020-10-13 04:54:10,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:54:10,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:54:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:54:10,442 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-13 04:54:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:10,642 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2020-10-13 04:54:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:54:10,642 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-13 04:54:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:10,644 INFO L225 Difference]: With dead ends: 55 [2020-10-13 04:54:10,644 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:54:10,645 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 04:54:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:54:10,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 04:54:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:54:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-13 04:54:10,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-13 04:54:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:10,664 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-13 04:54:10,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:54:10,665 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-13 04:54:10,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:54:10,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:10,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:10,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:54:10,669 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:10,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2002754829, now seen corresponding path program 1 times [2020-10-13 04:54:10,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:10,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583663685] [2020-10-13 04:54:10,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:10,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:10,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:15,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:54:15,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:15,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:54:15,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:54:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:54:15,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:54:15,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:15,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:15,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:15,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:15,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:15,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:54:15,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:15,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:15,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:54:15,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583663685] [2020-10-13 04:54:15,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:15,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:54:15,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099968953] [2020-10-13 04:54:15,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:54:15,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:54:15,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:54:15,748 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 5 states. [2020-10-13 04:54:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:15,865 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-10-13 04:54:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:54:15,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-13 04:54:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:15,867 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:54:15,867 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:54:15,868 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 04:54:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:54:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-13 04:54:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:54:15,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-10-13 04:54:15,876 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 29 [2020-10-13 04:54:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:15,877 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-10-13 04:54:15,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:54:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-10-13 04:54:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:54:15,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:15,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:15,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:54:15,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1979990410, now seen corresponding path program 2 times [2020-10-13 04:54:15,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:15,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494746739] [2020-10-13 04:54:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:15,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:16,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:20,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:54:20,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:20,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:54:20,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:20,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:54:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:54:20,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:54:20,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:20,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:20,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:20,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:20,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:20,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:20,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:20,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:20,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-13 04:54:20,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494746739] [2020-10-13 04:54:20,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:20,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:54:20,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730103943] [2020-10-13 04:54:20,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:54:20,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:20,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:54:20,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:54:20,972 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-10-13 04:54:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:21,158 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-13 04:54:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:54:21,159 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-13 04:54:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:21,160 INFO L225 Difference]: With dead ends: 77 [2020-10-13 04:54:21,160 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 04:54:21,161 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 04:54:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 04:54:21,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-13 04:54:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:54:21,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-10-13 04:54:21,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 35 [2020-10-13 04:54:21,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:21,178 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-10-13 04:54:21,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:54:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-10-13 04:54:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:54:21,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:21,181 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:21,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:54:21,182 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:21,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:21,182 INFO L82 PathProgramCache]: Analyzing trace with hash 682352339, now seen corresponding path program 3 times [2020-10-13 04:54:21,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:21,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973180416] [2020-10-13 04:54:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:21,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:21,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:26,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:54:26,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:54:26,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:26,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:54:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:54:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:54:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:54:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:26,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:26,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:54:26,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:26,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-13 04:54:26,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973180416] [2020-10-13 04:54:26,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:26,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:54:26,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373864782] [2020-10-13 04:54:26,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:54:26,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:54:26,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:54:26,272 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 7 states. [2020-10-13 04:54:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:26,428 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2020-10-13 04:54:26,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:54:26,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 41 [2020-10-13 04:54:26,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:26,430 INFO L225 Difference]: With dead ends: 88 [2020-10-13 04:54:26,431 INFO L226 Difference]: Without dead ends: 52 [2020-10-13 04:54:26,431 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 04:54:26,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-13 04:54:26,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-13 04:54:26,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:54:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-13 04:54:26,446 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 41 [2020-10-13 04:54:26,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:26,446 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-13 04:54:26,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:54:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-13 04:54:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:54:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:26,450 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:26,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:54:26,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -411261930, now seen corresponding path program 4 times [2020-10-13 04:54:26,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:26,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188681451] [2020-10-13 04:54:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:26,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:31,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:54:31,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:31,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:31,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:54:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-13 04:54:31,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:54:31,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:54:31,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:31,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:31,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:31,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:31,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:31,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:31,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:31,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:31,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 04:54:31,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188681451] [2020-10-13 04:54:31,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:31,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:54:31,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741616225] [2020-10-13 04:54:31,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:54:31,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:54:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:54:31,558 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 8 states. [2020-10-13 04:54:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:31,703 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2020-10-13 04:54:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:54:31,703 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-13 04:54:31,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:31,704 INFO L225 Difference]: With dead ends: 99 [2020-10-13 04:54:31,704 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 04:54:31,705 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 04:54:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 04:54:31,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-13 04:54:31,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 04:54:31,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-10-13 04:54:31,713 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 47 [2020-10-13 04:54:31,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:31,713 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-10-13 04:54:31,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:54:31,714 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-10-13 04:54:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-13 04:54:31,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:31,715 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:31,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:54:31,715 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:31,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:31,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1179573581, now seen corresponding path program 5 times [2020-10-13 04:54:31,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:31,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1763512275] [2020-10-13 04:54:31,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:31,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:36,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-13 04:54:36,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:36,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:54:36,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:36,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:54:36,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:54:36,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:54:36,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:36,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:36,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:36,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:36,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:36,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:36,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:36,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:36,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:36,810 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 04:54:36,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1763512275] [2020-10-13 04:54:36,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:36,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:54:36,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665678784] [2020-10-13 04:54:36,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:54:36,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:54:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:54:36,814 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 9 states. [2020-10-13 04:54:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:37,014 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2020-10-13 04:54:37,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:54:37,015 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 53 [2020-10-13 04:54:37,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:37,016 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:54:37,017 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:54:37,021 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 04:54:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:54:37,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-13 04:54:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:54:37,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-13 04:54:37,036 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 53 [2020-10-13 04:54:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:37,037 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-13 04:54:37,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:54:37,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-13 04:54:37,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:54:37,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:37,041 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:37,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:54:37,041 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:37,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:37,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1766162870, now seen corresponding path program 6 times [2020-10-13 04:54:37,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:37,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574123458] [2020-10-13 04:54:37,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:37,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:37,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:42,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:54:42,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:42,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:54:42,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:54:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:54:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:54:42,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:42,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:42,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:42,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:42,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:42,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:42,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:42,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:42,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:42,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:42,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:42,152 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-13 04:54:42,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574123458] [2020-10-13 04:54:42,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:42,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:54:42,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983806456] [2020-10-13 04:54:42,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:54:42,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:42,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:54:42,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:54:42,154 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 10 states. [2020-10-13 04:54:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:42,324 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2020-10-13 04:54:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:54:42,325 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-13 04:54:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:42,326 INFO L225 Difference]: With dead ends: 121 [2020-10-13 04:54:42,326 INFO L226 Difference]: Without dead ends: 70 [2020-10-13 04:54:42,327 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 04:54:42,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-13 04:54:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-13 04:54:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-13 04:54:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2020-10-13 04:54:42,334 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 59 [2020-10-13 04:54:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:42,334 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2020-10-13 04:54:42,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:54:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2020-10-13 04:54:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 04:54:42,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:42,335 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:42,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:54:42,336 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:42,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:42,336 INFO L82 PathProgramCache]: Analyzing trace with hash 728903315, now seen corresponding path program 7 times [2020-10-13 04:54:42,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:42,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154039952] [2020-10-13 04:54:42,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:42,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:42,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:43,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 04:54:47,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:47,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:54:47,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:54:47,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:47,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:54:47,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:47,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:47,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:47,453 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:47,453 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:47,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:47,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:47,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:47,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-13 04:54:47,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154039952] [2020-10-13 04:54:47,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:47,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:54:47,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715839872] [2020-10-13 04:54:47,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:54:47,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:47,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:54:47,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:54:47,460 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 11 states. [2020-10-13 04:54:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:47,638 INFO L93 Difference]: Finished difference Result 132 states and 149 transitions. [2020-10-13 04:54:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:54:47,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 65 [2020-10-13 04:54:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:47,639 INFO L225 Difference]: With dead ends: 132 [2020-10-13 04:54:47,640 INFO L226 Difference]: Without dead ends: 76 [2020-10-13 04:54:47,641 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 04:54:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-13 04:54:47,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-13 04:54:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-13 04:54:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-13 04:54:47,647 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 65 [2020-10-13 04:54:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:47,648 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-13 04:54:47,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:54:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-13 04:54:47,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:54:47,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:47,649 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:47,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:54:47,649 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:47,650 INFO L82 PathProgramCache]: Analyzing trace with hash -688629930, now seen corresponding path program 8 times [2020-10-13 04:54:47,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:47,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967229878] [2020-10-13 04:54:47,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:47,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:48,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:52,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:54:52,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:52,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:54:52,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:54:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-13 04:54:52,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:54:52,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:52,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:52,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:52,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:52,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:52,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-13 04:54:52,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967229878] [2020-10-13 04:54:52,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:52,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:54:52,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753294370] [2020-10-13 04:54:52,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:54:52,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:52,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:54:52,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:52,798 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 12 states. [2020-10-13 04:54:53,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:53,061 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2020-10-13 04:54:53,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:54:53,061 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-13 04:54:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:53,062 INFO L225 Difference]: With dead ends: 143 [2020-10-13 04:54:53,063 INFO L226 Difference]: Without dead ends: 82 [2020-10-13 04:54:53,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:54:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-13 04:54:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-13 04:54:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:54:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 88 transitions. [2020-10-13 04:54:53,073 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 88 transitions. Word has length 71 [2020-10-13 04:54:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:53,073 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 88 transitions. [2020-10-13 04:54:53,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:54:53,073 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 88 transitions. [2020-10-13 04:54:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:54:53,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:53,074 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:53,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:54:53,074 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:53,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1278280307, now seen corresponding path program 9 times [2020-10-13 04:54:53,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:53,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576610525] [2020-10-13 04:54:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:53,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:54,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:58,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:54:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:54:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:54:58,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:58,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:58,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:58,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:58,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:58,226 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-13 04:54:58,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576610525] [2020-10-13 04:54:58,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:58,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:54:58,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137270942] [2020-10-13 04:54:58,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:54:58,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:58,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:54:58,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:54:58,230 INFO L87 Difference]: Start difference. First operand 82 states and 88 transitions. Second operand 13 states. [2020-10-13 04:54:58,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:58,470 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2020-10-13 04:54:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:54:58,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-10-13 04:54:58,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:58,472 INFO L225 Difference]: With dead ends: 154 [2020-10-13 04:54:58,472 INFO L226 Difference]: Without dead ends: 88 [2020-10-13 04:54:58,473 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 04:54:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-13 04:54:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-13 04:54:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:54:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-10-13 04:54:58,481 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 77 [2020-10-13 04:54:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:58,481 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-10-13 04:54:58,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:54:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-10-13 04:54:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:54:58,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:58,483 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:58,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:54:58,483 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:58,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:58,484 INFO L82 PathProgramCache]: Analyzing trace with hash -106486538, now seen corresponding path program 10 times [2020-10-13 04:54:58,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:58,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749324194] [2020-10-13 04:54:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:58,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:58,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:59,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:55:03,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:03,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:55:03,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:55:03,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:55:03,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:03,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:03,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:03,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:03,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:03,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:03,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:03,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:03,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:03,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:03,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:03,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-13 04:55:03,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749324194] [2020-10-13 04:55:03,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:03,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:55:03,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768493920] [2020-10-13 04:55:03,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:55:03,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:03,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:55:03,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:55:03,679 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 14 states. [2020-10-13 04:55:03,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:03,963 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2020-10-13 04:55:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:55:03,964 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-13 04:55:03,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:03,965 INFO L225 Difference]: With dead ends: 165 [2020-10-13 04:55:03,965 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:55:03,966 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 04:55:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:55:03,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-10-13 04:55:03,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 04:55:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-13 04:55:03,988 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 83 [2020-10-13 04:55:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:03,991 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-13 04:55:03,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:55:03,992 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-13 04:55:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 04:55:03,993 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:03,993 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:03,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:55:03,994 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:03,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:03,997 INFO L82 PathProgramCache]: Analyzing trace with hash -391143853, now seen corresponding path program 11 times [2020-10-13 04:55:03,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:03,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440633891] [2020-10-13 04:55:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:04,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:04,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:06,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 04:55:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:55:09,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:55:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 04:55:09,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:55:09,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:09,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:09,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:09,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:09,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:09,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:09,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:09,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:09,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:09,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:55:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:55:09,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440633891] [2020-10-13 04:55:09,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:09,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:55:09,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600276831] [2020-10-13 04:55:09,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:55:09,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:55:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:55:09,185 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 15 states. [2020-10-13 04:55:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:09,477 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2020-10-13 04:55:09,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:55:09,478 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2020-10-13 04:55:09,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:09,479 INFO L225 Difference]: With dead ends: 176 [2020-10-13 04:55:09,479 INFO L226 Difference]: Without dead ends: 100 [2020-10-13 04:55:09,480 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 04:55:09,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-13 04:55:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-13 04:55:09,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 04:55:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-13 04:55:09,497 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 89 [2020-10-13 04:55:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:09,498 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-13 04:55:09,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:55:09,501 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-13 04:55:09,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-13 04:55:09,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:09,502 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:09,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:55:09,503 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:09,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:09,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2080107158, now seen corresponding path program 12 times [2020-10-13 04:55:09,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:09,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389333006] [2020-10-13 04:55:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:09,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:09,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:11,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:14,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:55:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:55:14,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:55:14,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:14,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:14,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:14,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:14,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:14,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:14,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:14,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:14,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-13 04:55:14,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389333006] [2020-10-13 04:55:14,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:14,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:55:14,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915988654] [2020-10-13 04:55:14,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:55:14,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:14,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:55:14,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:55:14,711 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 16 states. [2020-10-13 04:55:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:14,933 INFO L93 Difference]: Finished difference Result 187 states and 204 transitions. [2020-10-13 04:55:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:55:14,933 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 95 [2020-10-13 04:55:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:14,935 INFO L225 Difference]: With dead ends: 187 [2020-10-13 04:55:14,935 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 04:55:14,935 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 04:55:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 04:55:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2020-10-13 04:55:14,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-13 04:55:14,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2020-10-13 04:55:14,953 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 95 [2020-10-13 04:55:14,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:14,953 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2020-10-13 04:55:14,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:55:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2020-10-13 04:55:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:55:14,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:14,954 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:14,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:55:14,954 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:14,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:14,955 INFO L82 PathProgramCache]: Analyzing trace with hash -332398029, now seen corresponding path program 13 times [2020-10-13 04:55:14,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:14,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083482549] [2020-10-13 04:55:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:14,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:15,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:15,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:15,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:17,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:19,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:19,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:55:19,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:55:19,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:55:19,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:55:19,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:20,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:20,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:20,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:20,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:20,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:20,167 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-13 04:55:20,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083482549] [2020-10-13 04:55:20,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:20,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:55:20,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863690003] [2020-10-13 04:55:20,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:55:20,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:20,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:55:20,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:55:20,170 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 17 states. [2020-10-13 04:55:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:20,482 INFO L93 Difference]: Finished difference Result 198 states and 215 transitions. [2020-10-13 04:55:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:55:20,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 101 [2020-10-13 04:55:20,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:20,484 INFO L225 Difference]: With dead ends: 198 [2020-10-13 04:55:20,484 INFO L226 Difference]: Without dead ends: 112 [2020-10-13 04:55:20,485 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 04:55:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-13 04:55:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-13 04:55:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:55:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-10-13 04:55:20,492 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 101 [2020-10-13 04:55:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:20,492 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-10-13 04:55:20,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:55:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-10-13 04:55:20,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:55:20,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:20,493 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:20,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:55:20,494 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:20,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:20,494 INFO L82 PathProgramCache]: Analyzing trace with hash -904878026, now seen corresponding path program 14 times [2020-10-13 04:55:20,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:20,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556726242] [2020-10-13 04:55:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:20,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:24,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:25,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:55:25,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:25,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:25,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:25,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:25,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-13 04:55:25,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556726242] [2020-10-13 04:55:25,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:25,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:55:25,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064167936] [2020-10-13 04:55:25,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:55:25,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:25,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:55:25,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:55:25,733 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand 18 states. [2020-10-13 04:55:26,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:26,047 INFO L93 Difference]: Finished difference Result 209 states and 226 transitions. [2020-10-13 04:55:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:55:26,048 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 107 [2020-10-13 04:55:26,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:26,049 INFO L225 Difference]: With dead ends: 209 [2020-10-13 04:55:26,050 INFO L226 Difference]: Without dead ends: 118 [2020-10-13 04:55:26,050 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 04:55:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-13 04:55:26,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-13 04:55:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:55:26,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 124 transitions. [2020-10-13 04:55:26,056 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 124 transitions. Word has length 107 [2020-10-13 04:55:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:26,057 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 124 transitions. [2020-10-13 04:55:26,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:55:26,057 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 124 transitions. [2020-10-13 04:55:26,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:55:26,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:26,058 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:26,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:55:26,059 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2139869677, now seen corresponding path program 15 times [2020-10-13 04:55:26,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:26,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642212858] [2020-10-13 04:55:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:26,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:30,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:55:31,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-13 04:55:31,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:55:31,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:31,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:31,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:31,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:31,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:31,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:31,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:31,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-13 04:55:31,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642212858] [2020-10-13 04:55:31,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:31,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:55:31,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067072756] [2020-10-13 04:55:31,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:55:31,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:31,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:55:31,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:31,310 INFO L87 Difference]: Start difference. First operand 118 states and 124 transitions. Second operand 19 states. [2020-10-13 04:55:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:31,607 INFO L93 Difference]: Finished difference Result 220 states and 237 transitions. [2020-10-13 04:55:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:55:31,608 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 113 [2020-10-13 04:55:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:31,609 INFO L225 Difference]: With dead ends: 220 [2020-10-13 04:55:31,609 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:55:31,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:55:31,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:55:31,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-13 04:55:31,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-13 04:55:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2020-10-13 04:55:31,617 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 113 [2020-10-13 04:55:31,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:31,617 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2020-10-13 04:55:31,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:55:31,618 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2020-10-13 04:55:31,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-13 04:55:31,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:31,619 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:31,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:55:31,620 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:31,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:31,620 INFO L82 PathProgramCache]: Analyzing trace with hash -243049002, now seen corresponding path program 16 times [2020-10-13 04:55:31,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:31,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180963347] [2020-10-13 04:55:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:31,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:31,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:31,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:36,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:55:36,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:36,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:36,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:36,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:36,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:36,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:36,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:36,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:36,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-13 04:55:36,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180963347] [2020-10-13 04:55:36,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:36,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:55:36,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769598936] [2020-10-13 04:55:36,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:55:36,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:36,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:55:36,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:36,895 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand 20 states. [2020-10-13 04:55:37,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:37,205 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-10-13 04:55:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:55:37,205 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 119 [2020-10-13 04:55:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:37,206 INFO L225 Difference]: With dead ends: 231 [2020-10-13 04:55:37,207 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 04:55:37,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:55:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 04:55:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-13 04:55:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 04:55:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 136 transitions. [2020-10-13 04:55:37,217 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 136 transitions. Word has length 119 [2020-10-13 04:55:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:37,217 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 136 transitions. [2020-10-13 04:55:37,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:55:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 136 transitions. [2020-10-13 04:55:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-13 04:55:37,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:37,218 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:37,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:55:37,219 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:37,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:37,219 INFO L82 PathProgramCache]: Analyzing trace with hash 767435251, now seen corresponding path program 17 times [2020-10-13 04:55:37,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:37,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767280221] [2020-10-13 04:55:37,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:37,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:37,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:42,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:55:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-13 04:55:42,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:55:42,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:42,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:42,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:42,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:42,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:42,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:42,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:42,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:42,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:42,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-13 04:55:42,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767280221] [2020-10-13 04:55:42,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:42,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:55:42,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201436529] [2020-10-13 04:55:42,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:55:42,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:42,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:55:42,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:55:42,520 INFO L87 Difference]: Start difference. First operand 130 states and 136 transitions. Second operand 21 states. [2020-10-13 04:55:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:42,871 INFO L93 Difference]: Finished difference Result 242 states and 259 transitions. [2020-10-13 04:55:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:55:42,871 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 125 [2020-10-13 04:55:42,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:42,873 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:55:42,873 INFO L226 Difference]: Without dead ends: 136 [2020-10-13 04:55:42,874 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 04:55:42,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-13 04:55:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-13 04:55:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:55:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 142 transitions. [2020-10-13 04:55:42,882 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 142 transitions. Word has length 125 [2020-10-13 04:55:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:42,882 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 142 transitions. [2020-10-13 04:55:42,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:55:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 142 transitions. [2020-10-13 04:55:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:55:42,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:42,883 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:42,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:55:42,884 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:42,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:42,884 INFO L82 PathProgramCache]: Analyzing trace with hash -2123232394, now seen corresponding path program 18 times [2020-10-13 04:55:42,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:42,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281033604] [2020-10-13 04:55:42,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:42,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:42,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:43,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:47,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:55:47,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:55:47,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:48,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:48,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:48,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-13 04:55:48,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281033604] [2020-10-13 04:55:48,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:48,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:55:48,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409970906] [2020-10-13 04:55:48,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:55:48,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:48,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:55:48,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:55:48,199 INFO L87 Difference]: Start difference. First operand 136 states and 142 transitions. Second operand 22 states. [2020-10-13 04:55:48,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:48,535 INFO L93 Difference]: Finished difference Result 253 states and 270 transitions. [2020-10-13 04:55:48,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:55:48,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 131 [2020-10-13 04:55:48,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:48,537 INFO L225 Difference]: With dead ends: 253 [2020-10-13 04:55:48,537 INFO L226 Difference]: Without dead ends: 142 [2020-10-13 04:55:48,538 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 04:55:48,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-13 04:55:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-10-13 04:55:48,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:55:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 148 transitions. [2020-10-13 04:55:48,547 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 148 transitions. Word has length 131 [2020-10-13 04:55:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:48,547 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 148 transitions. [2020-10-13 04:55:48,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:55:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 148 transitions. [2020-10-13 04:55:48,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:55:48,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:48,549 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:48,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:55:48,549 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:48,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:48,549 INFO L82 PathProgramCache]: Analyzing trace with hash -87040557, now seen corresponding path program 19 times [2020-10-13 04:55:48,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:48,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314579727] [2020-10-13 04:55:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:48,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:48,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:55:53,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:53,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:53,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:53,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:53,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:53,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:53,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:53,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:53,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:53,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:53,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-13 04:55:53,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314579727] [2020-10-13 04:55:53,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:53,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:55:53,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923839940] [2020-10-13 04:55:53,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:55:53,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:55:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:55:53,887 INFO L87 Difference]: Start difference. First operand 142 states and 148 transitions. Second operand 23 states. [2020-10-13 04:55:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:55:54,238 INFO L93 Difference]: Finished difference Result 264 states and 281 transitions. [2020-10-13 04:55:54,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:55:54,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 137 [2020-10-13 04:55:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:55:54,240 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:55:54,240 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 04:55:54,241 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 04:55:54,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 04:55:54,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-13 04:55:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-13 04:55:54,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 154 transitions. [2020-10-13 04:55:54,250 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 154 transitions. Word has length 137 [2020-10-13 04:55:54,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:55:54,251 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 154 transitions. [2020-10-13 04:55:54,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:55:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 154 transitions. [2020-10-13 04:55:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-13 04:55:54,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:55:54,253 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:55:54,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:55:54,254 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:55:54,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:55:54,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1786425622, now seen corresponding path program 20 times [2020-10-13 04:55:54,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:55:54,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247101805] [2020-10-13 04:55:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:55:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:54,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:54,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:59,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-13 04:55:59,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:55:59,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:55:59,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:55:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:55:59,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:55:59,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:59,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:55:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:55:59,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:55:59,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:55:59,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:55:59,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:55:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:55:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-13 04:55:59,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247101805] [2020-10-13 04:55:59,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:55:59,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:55:59,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534181706] [2020-10-13 04:55:59,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:55:59,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:55:59,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:55:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:55:59,642 INFO L87 Difference]: Start difference. First operand 148 states and 154 transitions. Second operand 24 states. [2020-10-13 04:56:00,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:00,043 INFO L93 Difference]: Finished difference Result 275 states and 292 transitions. [2020-10-13 04:56:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:56:00,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 143 [2020-10-13 04:56:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:00,047 INFO L225 Difference]: With dead ends: 275 [2020-10-13 04:56:00,048 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 04:56:00,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:56:00,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 04:56:00,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2020-10-13 04:56:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-13 04:56:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 160 transitions. [2020-10-13 04:56:00,056 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 160 transitions. Word has length 143 [2020-10-13 04:56:00,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:00,057 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 160 transitions. [2020-10-13 04:56:00,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:56:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 160 transitions. [2020-10-13 04:56:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-13 04:56:00,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:00,058 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:00,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:56:00,059 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:00,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:00,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1930731085, now seen corresponding path program 21 times [2020-10-13 04:56:00,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:00,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416548342] [2020-10-13 04:56:00,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:00,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:00,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:00,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:00,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:05,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-13 04:56:05,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:56:05,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:05,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:05,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:05,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:05,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:05,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-13 04:56:05,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416548342] [2020-10-13 04:56:05,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:05,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:56:05,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763762100] [2020-10-13 04:56:05,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:56:05,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:05,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:56:05,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:05,478 INFO L87 Difference]: Start difference. First operand 154 states and 160 transitions. Second operand 25 states. [2020-10-13 04:56:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:05,910 INFO L93 Difference]: Finished difference Result 286 states and 303 transitions. [2020-10-13 04:56:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:56:05,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 149 [2020-10-13 04:56:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:05,912 INFO L225 Difference]: With dead ends: 286 [2020-10-13 04:56:05,912 INFO L226 Difference]: Without dead ends: 160 [2020-10-13 04:56:05,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:56:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-13 04:56:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-13 04:56:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:56:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-10-13 04:56:05,922 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 149 [2020-10-13 04:56:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:05,922 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-10-13 04:56:05,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:56:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-10-13 04:56:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:56:05,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:05,924 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:05,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:56:05,925 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:05,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:05,925 INFO L82 PathProgramCache]: Analyzing trace with hash -558149962, now seen corresponding path program 22 times [2020-10-13 04:56:05,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:05,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243377095] [2020-10-13 04:56:05,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:05,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:06,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:06,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:06,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:56:10,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:10,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:56:10,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:56:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-13 04:56:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:56:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:11,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:11,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:11,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:11,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:11,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:11,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:11,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:11,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:11,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:11,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:11,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:11,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-13 04:56:11,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243377095] [2020-10-13 04:56:11,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:11,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:56:11,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739903553] [2020-10-13 04:56:11,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:56:11,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:11,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:56:11,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:56:11,363 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 26 states. [2020-10-13 04:56:11,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:11,775 INFO L93 Difference]: Finished difference Result 297 states and 314 transitions. [2020-10-13 04:56:11,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:56:11,776 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 155 [2020-10-13 04:56:11,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:11,777 INFO L225 Difference]: With dead ends: 297 [2020-10-13 04:56:11,777 INFO L226 Difference]: Without dead ends: 166 [2020-10-13 04:56:11,779 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 04:56:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-13 04:56:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2020-10-13 04:56:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-13 04:56:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-10-13 04:56:11,786 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 155 [2020-10-13 04:56:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:11,787 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-10-13 04:56:11,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:56:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-10-13 04:56:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 04:56:11,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:11,788 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:11,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:56:11,789 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1204989331, now seen corresponding path program 23 times [2020-10-13 04:56:11,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:11,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028134652] [2020-10-13 04:56:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:16,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:16,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 04:56:16,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:16,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-13 04:56:16,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:56:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-13 04:56:16,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:56:16,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:17,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:17,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:17,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:17,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:17,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:17,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-13 04:56:17,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028134652] [2020-10-13 04:56:17,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:17,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:56:17,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937235834] [2020-10-13 04:56:17,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:56:17,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:56:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:17,270 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 27 states. [2020-10-13 04:56:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:17,746 INFO L93 Difference]: Finished difference Result 308 states and 325 transitions. [2020-10-13 04:56:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:56:17,747 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 161 [2020-10-13 04:56:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:17,749 INFO L225 Difference]: With dead ends: 308 [2020-10-13 04:56:17,749 INFO L226 Difference]: Without dead ends: 172 [2020-10-13 04:56:17,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:56:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-13 04:56:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-10-13 04:56:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:56:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-10-13 04:56:17,758 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 161 [2020-10-13 04:56:17,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:17,758 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-10-13 04:56:17,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:56:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-10-13 04:56:17,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 04:56:17,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:17,759 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:17,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:56:17,760 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:17,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:17,760 INFO L82 PathProgramCache]: Analyzing trace with hash 835839062, now seen corresponding path program 24 times [2020-10-13 04:56:17,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:17,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185211798] [2020-10-13 04:56:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:17,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:17,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:18,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:22,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:22,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:56:22,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:23,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:23,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:23,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-13 04:56:23,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185211798] [2020-10-13 04:56:23,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:23,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:56:23,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265960042] [2020-10-13 04:56:23,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:56:23,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:56:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:23,244 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 28 states. [2020-10-13 04:56:23,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:23,681 INFO L93 Difference]: Finished difference Result 319 states and 336 transitions. [2020-10-13 04:56:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:56:23,682 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 167 [2020-10-13 04:56:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:23,683 INFO L225 Difference]: With dead ends: 319 [2020-10-13 04:56:23,683 INFO L226 Difference]: Without dead ends: 178 [2020-10-13 04:56:23,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:56:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-13 04:56:23,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-13 04:56:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 04:56:23,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 184 transitions. [2020-10-13 04:56:23,690 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 184 transitions. Word has length 167 [2020-10-13 04:56:23,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:23,690 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 184 transitions. [2020-10-13 04:56:23,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:56:23,691 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 184 transitions. [2020-10-13 04:56:23,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 04:56:23,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:23,692 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:23,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:56:23,692 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:23,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1841807731, now seen corresponding path program 25 times [2020-10-13 04:56:23,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:23,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378101808] [2020-10-13 04:56:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:23,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:23,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:23,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:28,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:28,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 04:56:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:56:28,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:29,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:29,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:29,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:29,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:29,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:29,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:29,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:29,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:29,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-13 04:56:29,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378101808] [2020-10-13 04:56:29,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:29,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:56:29,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190427856] [2020-10-13 04:56:29,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:56:29,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:56:29,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:29,332 INFO L87 Difference]: Start difference. First operand 178 states and 184 transitions. Second operand 29 states. [2020-10-13 04:56:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:29,908 INFO L93 Difference]: Finished difference Result 330 states and 347 transitions. [2020-10-13 04:56:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:56:29,908 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 173 [2020-10-13 04:56:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:29,909 INFO L225 Difference]: With dead ends: 330 [2020-10-13 04:56:29,910 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:56:29,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:56:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:56:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-13 04:56:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:56:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 190 transitions. [2020-10-13 04:56:29,917 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 190 transitions. Word has length 173 [2020-10-13 04:56:29,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:29,918 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 190 transitions. [2020-10-13 04:56:29,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:56:29,918 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 190 transitions. [2020-10-13 04:56:29,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:56:29,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:29,919 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:29,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:56:29,920 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:29,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:29,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1193512458, now seen corresponding path program 26 times [2020-10-13 04:56:29,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:29,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844098760] [2020-10-13 04:56:29,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:29,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:30,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:34,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:56:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-13 04:56:34,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:56:34,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:35,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:35,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:35,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:35,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:35,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:35,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:35,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:35,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:35,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:35,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-13 04:56:35,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844098760] [2020-10-13 04:56:35,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:35,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:56:35,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81046317] [2020-10-13 04:56:35,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:56:35,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:56:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:35,637 INFO L87 Difference]: Start difference. First operand 184 states and 190 transitions. Second operand 30 states. [2020-10-13 04:56:36,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:36,187 INFO L93 Difference]: Finished difference Result 341 states and 358 transitions. [2020-10-13 04:56:36,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:56:36,187 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 179 [2020-10-13 04:56:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:36,189 INFO L225 Difference]: With dead ends: 341 [2020-10-13 04:56:36,189 INFO L226 Difference]: Without dead ends: 190 [2020-10-13 04:56:36,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:56:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-13 04:56:36,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2020-10-13 04:56:36,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-13 04:56:36,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 196 transitions. [2020-10-13 04:56:36,197 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 196 transitions. Word has length 179 [2020-10-13 04:56:36,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:36,197 INFO L479 AbstractCegarLoop]: Abstraction has 190 states and 196 transitions. [2020-10-13 04:56:36,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:56:36,198 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 196 transitions. [2020-10-13 04:56:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-13 04:56:36,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:36,199 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:36,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:56:36,199 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1066179923, now seen corresponding path program 27 times [2020-10-13 04:56:36,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:36,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026993036] [2020-10-13 04:56:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:36,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:56:41,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:41,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:41,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:41,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:41,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:41,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-13 04:56:41,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026993036] [2020-10-13 04:56:41,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:41,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:56:41,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643967593] [2020-10-13 04:56:41,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:56:41,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:56:41,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:56:41,845 INFO L87 Difference]: Start difference. First operand 190 states and 196 transitions. Second operand 31 states. [2020-10-13 04:56:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:42,435 INFO L93 Difference]: Finished difference Result 352 states and 369 transitions. [2020-10-13 04:56:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:56:42,436 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 185 [2020-10-13 04:56:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:42,438 INFO L225 Difference]: With dead ends: 352 [2020-10-13 04:56:42,438 INFO L226 Difference]: Without dead ends: 196 [2020-10-13 04:56:42,441 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 04:56:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-13 04:56:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2020-10-13 04:56:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:56:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 202 transitions. [2020-10-13 04:56:42,453 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 202 transitions. Word has length 185 [2020-10-13 04:56:42,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:42,453 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 202 transitions. [2020-10-13 04:56:42,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:56:42,454 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 202 transitions. [2020-10-13 04:56:42,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:56:42,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:42,456 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:42,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:56:42,456 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:42,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1434912874, now seen corresponding path program 28 times [2020-10-13 04:56:42,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:42,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358144559] [2020-10-13 04:56:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:42,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:42,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:43,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:56:47,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:56:47,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:56:47,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:48,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:48,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:48,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:48,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:48,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:48,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:48,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:48,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:48,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:48,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:56:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-13 04:56:48,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358144559] [2020-10-13 04:56:48,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:48,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:56:48,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150003127] [2020-10-13 04:56:48,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:56:48,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:48,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:56:48,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:56:48,207 INFO L87 Difference]: Start difference. First operand 196 states and 202 transitions. Second operand 32 states. [2020-10-13 04:56:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:48,751 INFO L93 Difference]: Finished difference Result 363 states and 380 transitions. [2020-10-13 04:56:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:56:48,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 191 [2020-10-13 04:56:48,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:48,753 INFO L225 Difference]: With dead ends: 363 [2020-10-13 04:56:48,754 INFO L226 Difference]: Without dead ends: 202 [2020-10-13 04:56:48,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:56:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-13 04:56:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-10-13 04:56:48,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 04:56:48,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 208 transitions. [2020-10-13 04:56:48,783 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 208 transitions. Word has length 191 [2020-10-13 04:56:48,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:48,783 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 208 transitions. [2020-10-13 04:56:48,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:56:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 208 transitions. [2020-10-13 04:56:48,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 04:56:48,786 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:48,788 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:48,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:56:48,788 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 476266803, now seen corresponding path program 29 times [2020-10-13 04:56:48,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:48,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575961309] [2020-10-13 04:56:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:49,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:49,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:53,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:53,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 04:56:53,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:56:53,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:56:53,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:56:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 04:56:53,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:56:53,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:56:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:54,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:54,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:56:54,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:56:54,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:56:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:56:54,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:56:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:56:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:56:54,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:56:54,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:56:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-13 04:56:54,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575961309] [2020-10-13 04:56:54,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:56:54,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:56:54,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379028507] [2020-10-13 04:56:54,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:56:54,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:56:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:56:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:56:54,467 INFO L87 Difference]: Start difference. First operand 202 states and 208 transitions. Second operand 33 states. [2020-10-13 04:56:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:56:55,041 INFO L93 Difference]: Finished difference Result 374 states and 391 transitions. [2020-10-13 04:56:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:56:55,041 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 197 [2020-10-13 04:56:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:56:55,043 INFO L225 Difference]: With dead ends: 374 [2020-10-13 04:56:55,043 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 04:56:55,044 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 04:56:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 04:56:55,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-13 04:56:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:56:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 214 transitions. [2020-10-13 04:56:55,052 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 214 transitions. Word has length 197 [2020-10-13 04:56:55,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:56:55,052 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 214 transitions. [2020-10-13 04:56:55,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:56:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 214 transitions. [2020-10-13 04:56:55,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 04:56:55,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:56:55,054 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:56:55,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:56:55,055 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:56:55,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:56:55,055 INFO L82 PathProgramCache]: Analyzing trace with hash -20613834, now seen corresponding path program 30 times [2020-10-13 04:56:55,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:56:55,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122296098] [2020-10-13 04:56:55,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:56:55,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:56:55,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:55,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:56:55,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:57:00,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:00,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:00,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:00,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:00,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:00,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-13 04:57:00,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122296098] [2020-10-13 04:57:00,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:00,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:57:00,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977385360] [2020-10-13 04:57:00,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:57:00,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:57:00,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:00,751 INFO L87 Difference]: Start difference. First operand 208 states and 214 transitions. Second operand 34 states. [2020-10-13 04:57:01,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:01,384 INFO L93 Difference]: Finished difference Result 385 states and 402 transitions. [2020-10-13 04:57:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:57:01,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 203 [2020-10-13 04:57:01,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:01,386 INFO L225 Difference]: With dead ends: 385 [2020-10-13 04:57:01,386 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 04:57:01,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:57:01,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 04:57:01,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2020-10-13 04:57:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-13 04:57:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 220 transitions. [2020-10-13 04:57:01,399 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 220 transitions. Word has length 203 [2020-10-13 04:57:01,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:01,400 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 220 transitions. [2020-10-13 04:57:01,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:57:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 220 transitions. [2020-10-13 04:57:01,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-13 04:57:01,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:01,401 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:01,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:57:01,401 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:01,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:01,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1576162029, now seen corresponding path program 31 times [2020-10-13 04:57:01,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:01,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512667341] [2020-10-13 04:57:01,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:01,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:01,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:01,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:06,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:57:06,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:07,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:07,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:07,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:07,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-13 04:57:07,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512667341] [2020-10-13 04:57:07,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:07,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:57:07,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073857896] [2020-10-13 04:57:07,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:57:07,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:07,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:57:07,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:07,166 INFO L87 Difference]: Start difference. First operand 214 states and 220 transitions. Second operand 35 states. [2020-10-13 04:57:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:07,696 INFO L93 Difference]: Finished difference Result 396 states and 413 transitions. [2020-10-13 04:57:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:57:07,697 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 209 [2020-10-13 04:57:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:07,698 INFO L225 Difference]: With dead ends: 396 [2020-10-13 04:57:07,699 INFO L226 Difference]: Without dead ends: 220 [2020-10-13 04:57:07,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:57:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-13 04:57:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-13 04:57:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-13 04:57:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 226 transitions. [2020-10-13 04:57:07,708 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 226 transitions. Word has length 209 [2020-10-13 04:57:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:07,709 INFO L479 AbstractCegarLoop]: Abstraction has 220 states and 226 transitions. [2020-10-13 04:57:07,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:57:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 226 transitions. [2020-10-13 04:57:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-13 04:57:07,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:07,710 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:07,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:57:07,711 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1331686102, now seen corresponding path program 32 times [2020-10-13 04:57:07,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:07,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978113781] [2020-10-13 04:57:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:07,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:08,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:08,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:12,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-13 04:57:12,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:57:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:13,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:13,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:13,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-13 04:57:13,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978113781] [2020-10-13 04:57:13,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:13,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:57:13,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761594012] [2020-10-13 04:57:13,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:57:13,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:13,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:57:13,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:57:13,511 INFO L87 Difference]: Start difference. First operand 220 states and 226 transitions. Second operand 36 states. [2020-10-13 04:57:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:14,121 INFO L93 Difference]: Finished difference Result 407 states and 424 transitions. [2020-10-13 04:57:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:57:14,121 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 215 [2020-10-13 04:57:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:14,123 INFO L225 Difference]: With dead ends: 407 [2020-10-13 04:57:14,123 INFO L226 Difference]: Without dead ends: 226 [2020-10-13 04:57:14,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:57:14,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-13 04:57:14,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2020-10-13 04:57:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-13 04:57:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 232 transitions. [2020-10-13 04:57:14,133 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 232 transitions. Word has length 215 [2020-10-13 04:57:14,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:14,133 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 232 transitions. [2020-10-13 04:57:14,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:57:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 232 transitions. [2020-10-13 04:57:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 04:57:14,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:14,135 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:14,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:57:14,135 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:14,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash -858922765, now seen corresponding path program 33 times [2020-10-13 04:57:14,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:14,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288864182] [2020-10-13 04:57:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:14,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:19,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:19,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 04:57:19,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:19,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 04:57:19,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:57:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-13 04:57:19,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:57:19,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:19,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:19,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-13 04:57:19,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288864182] [2020-10-13 04:57:19,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:19,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:57:19,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338625182] [2020-10-13 04:57:19,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:57:19,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:19,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:57:19,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:19,994 INFO L87 Difference]: Start difference. First operand 226 states and 232 transitions. Second operand 37 states. [2020-10-13 04:57:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:20,561 INFO L93 Difference]: Finished difference Result 418 states and 435 transitions. [2020-10-13 04:57:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:57:20,562 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 221 [2020-10-13 04:57:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:20,563 INFO L225 Difference]: With dead ends: 418 [2020-10-13 04:57:20,563 INFO L226 Difference]: Without dead ends: 232 [2020-10-13 04:57:20,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:57:20,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-13 04:57:20,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-13 04:57:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:57:20,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 238 transitions. [2020-10-13 04:57:20,572 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 238 transitions. Word has length 221 [2020-10-13 04:57:20,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:20,572 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 238 transitions. [2020-10-13 04:57:20,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:57:20,572 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 238 transitions. [2020-10-13 04:57:20,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:57:20,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:20,574 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:20,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:57:20,574 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:20,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:20,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1218029450, now seen corresponding path program 34 times [2020-10-13 04:57:20,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:20,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462557411] [2020-10-13 04:57:20,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:20,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:21,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:25,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-13 04:57:25,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:57:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:26,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:26,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:26,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:26,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-13 04:57:26,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462557411] [2020-10-13 04:57:26,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:26,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:57:26,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752589432] [2020-10-13 04:57:26,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:57:26,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:26,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:57:26,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:26,482 INFO L87 Difference]: Start difference. First operand 232 states and 238 transitions. Second operand 38 states. [2020-10-13 04:57:27,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:27,139 INFO L93 Difference]: Finished difference Result 429 states and 446 transitions. [2020-10-13 04:57:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:57:27,139 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 227 [2020-10-13 04:57:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:27,141 INFO L225 Difference]: With dead ends: 429 [2020-10-13 04:57:27,141 INFO L226 Difference]: Without dead ends: 238 [2020-10-13 04:57:27,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:57:27,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-13 04:57:27,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2020-10-13 04:57:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-13 04:57:27,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 244 transitions. [2020-10-13 04:57:27,150 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 244 transitions. Word has length 227 [2020-10-13 04:57:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:27,150 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 244 transitions. [2020-10-13 04:57:27,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:57:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 244 transitions. [2020-10-13 04:57:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-13 04:57:27,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:27,152 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:27,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:57:27,152 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:27,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:27,153 INFO L82 PathProgramCache]: Analyzing trace with hash 392551635, now seen corresponding path program 35 times [2020-10-13 04:57:27,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:27,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629989696] [2020-10-13 04:57:27,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:27,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:27,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:32,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:32,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-13 04:57:32,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-13 04:57:32,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:57:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:57:32,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:57:32,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:33,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:33,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:33,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:33,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:33,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-13 04:57:33,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629989696] [2020-10-13 04:57:33,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:33,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:57:33,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446817085] [2020-10-13 04:57:33,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:57:33,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:57:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:33,091 INFO L87 Difference]: Start difference. First operand 238 states and 244 transitions. Second operand 39 states. [2020-10-13 04:57:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:33,708 INFO L93 Difference]: Finished difference Result 440 states and 457 transitions. [2020-10-13 04:57:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:57:33,709 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 233 [2020-10-13 04:57:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:33,711 INFO L225 Difference]: With dead ends: 440 [2020-10-13 04:57:33,711 INFO L226 Difference]: Without dead ends: 244 [2020-10-13 04:57:33,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:57:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-13 04:57:33,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2020-10-13 04:57:33,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-10-13 04:57:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 250 transitions. [2020-10-13 04:57:33,721 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 250 transitions. Word has length 233 [2020-10-13 04:57:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:33,721 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 250 transitions. [2020-10-13 04:57:33,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:57:33,721 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 250 transitions. [2020-10-13 04:57:33,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-13 04:57:33,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:33,723 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:33,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:57:33,723 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:33,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:33,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1284063722, now seen corresponding path program 36 times [2020-10-13 04:57:33,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:33,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473234242] [2020-10-13 04:57:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:33,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:33,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:38,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:38,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-13 04:57:38,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:57:38,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:39,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:39,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:39,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:39,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:39,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-13 04:57:39,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473234242] [2020-10-13 04:57:39,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:39,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:57:39,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084444198] [2020-10-13 04:57:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:57:39,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:57:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:57:39,700 INFO L87 Difference]: Start difference. First operand 244 states and 250 transitions. Second operand 40 states. [2020-10-13 04:57:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:40,457 INFO L93 Difference]: Finished difference Result 451 states and 468 transitions. [2020-10-13 04:57:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:57:40,458 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 239 [2020-10-13 04:57:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:40,460 INFO L225 Difference]: With dead ends: 451 [2020-10-13 04:57:40,460 INFO L226 Difference]: Without dead ends: 250 [2020-10-13 04:57:40,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:57:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-13 04:57:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2020-10-13 04:57:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 250 states. [2020-10-13 04:57:40,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 256 transitions. [2020-10-13 04:57:40,470 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 256 transitions. Word has length 239 [2020-10-13 04:57:40,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:40,470 INFO L479 AbstractCegarLoop]: Abstraction has 250 states and 256 transitions. [2020-10-13 04:57:40,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:57:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 256 transitions. [2020-10-13 04:57:40,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-13 04:57:40,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:40,472 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:40,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:57:40,473 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:40,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:40,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1692950349, now seen corresponding path program 37 times [2020-10-13 04:57:40,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:40,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199002504] [2020-10-13 04:57:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:40,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:40,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:41,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:41,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:45,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:57:45,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:46,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:46,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:46,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:46,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:46,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-13 04:57:46,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199002504] [2020-10-13 04:57:46,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:46,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:57:46,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169467969] [2020-10-13 04:57:46,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:57:46,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:46,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:57:46,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:57:46,582 INFO L87 Difference]: Start difference. First operand 250 states and 256 transitions. Second operand 41 states. [2020-10-13 04:57:47,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:47,313 INFO L93 Difference]: Finished difference Result 462 states and 479 transitions. [2020-10-13 04:57:47,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:57:47,314 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 245 [2020-10-13 04:57:47,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:47,316 INFO L225 Difference]: With dead ends: 462 [2020-10-13 04:57:47,316 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 04:57:47,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:57:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 04:57:47,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-13 04:57:47,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-13 04:57:47,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 262 transitions. [2020-10-13 04:57:47,325 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 262 transitions. Word has length 245 [2020-10-13 04:57:47,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:47,325 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 262 transitions. [2020-10-13 04:57:47,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:57:47,326 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 262 transitions. [2020-10-13 04:57:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-13 04:57:47,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:47,327 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:47,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:57:47,328 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 28253110, now seen corresponding path program 38 times [2020-10-13 04:57:47,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:47,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512794763] [2020-10-13 04:57:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:47,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:47,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:52,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:57:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-13 04:57:52,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:57:52,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:53,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:57:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:53,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:53,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:53,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:57:53,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:57:53,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:57:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2020-10-13 04:57:53,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512794763] [2020-10-13 04:57:53,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:57:53,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:57:53,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174615626] [2020-10-13 04:57:53,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:57:53,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:57:53,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:57:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:57:53,477 INFO L87 Difference]: Start difference. First operand 256 states and 262 transitions. Second operand 42 states. [2020-10-13 04:57:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:57:54,270 INFO L93 Difference]: Finished difference Result 473 states and 490 transitions. [2020-10-13 04:57:54,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:57:54,270 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 251 [2020-10-13 04:57:54,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:57:54,273 INFO L225 Difference]: With dead ends: 473 [2020-10-13 04:57:54,273 INFO L226 Difference]: Without dead ends: 262 [2020-10-13 04:57:54,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:57:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-13 04:57:54,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-10-13 04:57:54,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-13 04:57:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 268 transitions. [2020-10-13 04:57:54,283 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 268 transitions. Word has length 251 [2020-10-13 04:57:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:57:54,283 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 268 transitions. [2020-10-13 04:57:54,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:57:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 268 transitions. [2020-10-13 04:57:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-13 04:57:54,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:57:54,285 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:57:54,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:57:54,285 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:57:54,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:57:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 799354003, now seen corresponding path program 39 times [2020-10-13 04:57:54,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:57:54,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814774448] [2020-10-13 04:57:54,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:57:54,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:57:54,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:54,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:55,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:57:59,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:57:59,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-13 04:57:59,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:57:59,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:57:59,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:57:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:57:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 04:57:59,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:57:59,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:58:00,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:00,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:00,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:00,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:00,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4680 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3900 trivial. 0 not checked. [2020-10-13 04:58:00,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814774448] [2020-10-13 04:58:00,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:00,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:58:00,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273906038] [2020-10-13 04:58:00,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:58:00,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:00,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:58:00,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:58:00,414 INFO L87 Difference]: Start difference. First operand 262 states and 268 transitions. Second operand 43 states. [2020-10-13 04:58:01,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:01,091 INFO L93 Difference]: Finished difference Result 484 states and 501 transitions. [2020-10-13 04:58:01,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:58:01,091 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 257 [2020-10-13 04:58:01,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:01,093 INFO L225 Difference]: With dead ends: 484 [2020-10-13 04:58:01,093 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 04:58:01,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:58:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 04:58:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-10-13 04:58:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-10-13 04:58:01,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 274 transitions. [2020-10-13 04:58:01,103 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 274 transitions. Word has length 257 [2020-10-13 04:58:01,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:01,103 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 274 transitions. [2020-10-13 04:58:01,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:58:01,103 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 274 transitions. [2020-10-13 04:58:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-13 04:58:01,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:01,105 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:01,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:58:01,108 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:01,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2119339690, now seen corresponding path program 40 times [2020-10-13 04:58:01,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:01,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007124254] [2020-10-13 04:58:01,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:01,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:01,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 271 [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:58:06,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:58:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:58:06,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:58:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:07,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:58:07,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:58:07,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:58:07,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:58:07,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:58:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:58:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:58:07,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:58:07,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:58:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4920 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 4100 trivial. 0 not checked. [2020-10-13 04:58:07,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007124254] [2020-10-13 04:58:07,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:58:07,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:58:07,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219843021] [2020-10-13 04:58:07,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:58:07,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:58:07,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:58:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:58:07,310 INFO L87 Difference]: Start difference. First operand 268 states and 274 transitions. Second operand 44 states. [2020-10-13 04:58:08,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:58:08,109 INFO L93 Difference]: Finished difference Result 495 states and 512 transitions. [2020-10-13 04:58:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:58:08,110 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 263 [2020-10-13 04:58:08,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:58:08,112 INFO L225 Difference]: With dead ends: 495 [2020-10-13 04:58:08,112 INFO L226 Difference]: Without dead ends: 274 [2020-10-13 04:58:08,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:58:08,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-13 04:58:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 274. [2020-10-13 04:58:08,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 274 states. [2020-10-13 04:58:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 280 transitions. [2020-10-13 04:58:08,120 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 280 transitions. Word has length 263 [2020-10-13 04:58:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:58:08,120 INFO L479 AbstractCegarLoop]: Abstraction has 274 states and 280 transitions. [2020-10-13 04:58:08,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:58:08,120 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 280 transitions. [2020-10-13 04:58:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-13 04:58:08,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:58:08,122 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:58:08,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:58:08,123 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:58:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:58:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1957658509, now seen corresponding path program 41 times [2020-10-13 04:58:08,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:58:08,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219040592] [2020-10-13 04:58:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:58:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:58:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:58:08,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking...